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County Detail Report for 8-Hour (2008), 8-Hour Ozone (1997-Revoked) and 1-Hour (1979-Revoked)

Data is current as of April 30, 2018

The 1997 8-hour Ozone NAAQS was revoked effective April 6, 2015 (80 FR 12264).

"Part County NA" means only a portion of the county is designated nonattainment (NA).



Listed by State, County, NAAQS      * Part County NA     NA Area Name (Classification, if applicable)


ALABAMA
Jefferson County
8-Hr Ozone (1997) Birmingham, AL - (Former Subpart 1)
1-Hr Ozone (1979) Birmingham, AL - (Marginal)
Shelby County
8-Hr Ozone (1997) Birmingham, AL - (Former Subpart 1)
1-Hr Ozone (1979) Birmingham, AL - (Marginal)
ARIZONA
Maricopa County
8-Hr Ozone (1997) * Phoenix-Mesa, AZ - (Marginal)
1-Hr Ozone (1979) * Phoenix, AZ - (Serious)
8-Hr Ozone (2008) * Phoenix-Mesa, AZ - (Moderate)
Pinal County
8-Hr Ozone (1997) * Phoenix-Mesa, AZ - (Marginal)
8-Hr Ozone (2008) * Phoenix-Mesa, AZ - (Moderate)
ARKANSAS
Crittenden County
8-Hr Ozone (1997) Memphis, TN-AR - (Moderate)
8-Hr Ozone (2008) Memphis, TN-MS-AR - (Marginal)
CALIFORNIA
Alameda County
8-Hr Ozone (1997) San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) San Francisco Bay Area, CA - (Marginal)
Amador County
8-Hr Ozone (1997) Amador and Calaveras Cos. (Central Mountain Cos.), CA - (Moderate)
Butte County
8-Hr Ozone (1997) Chico, CA - (Marginal)
1-Hr Ozone (1979) Chico, CA - (Section 185A)
8-Hr Ozone (2008) Chico (Butte County), CA - (Marginal)
Calaveras County
8-Hr Ozone (1997) Amador and Calaveras Cos. (Central Mountain Cos.), CA - (Moderate)
8-Hr Ozone (2008) Calaveras County, CA - (Marginal)
Contra Costa County
8-Hr Ozone (1997) San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) San Francisco Bay Area, CA - (Marginal)
El Dorado County
8-Hr Ozone (1997) * Sacramento Metro, CA - (Severe 15)
1-Hr Ozone (1979) * Sacramento Metro, CA - (Severe 15)
8-Hr Ozone (2008) * Sacramento Metro, CA - (Severe 15)
Fresno County
8-Hr Ozone (1997) San Joaquin Valley, CA - (Extreme)
1-Hr Ozone (1979) San Joaquin Valley, CA - (Extreme)
8-Hr Ozone (2008) San Joaquin Valley, CA - (Extreme)
Imperial County
8-Hr Ozone (1997) Imperial Co, CA - (Moderate)
1-Hr Ozone (1979) Imperial Co, CA - (Section 185A)
8-Hr Ozone (2008) Imperial County, CA - (Moderate)
Kern County
8-Hr Ozone (1997) * Kern Co (Eastern Kern), CA - (Moderate)
8-Hr Ozone (1997) * San Joaquin Valley, CA - (Extreme)
1-Hr Ozone (1979) * East Kern Co, CA - (Serious)
1-Hr Ozone (1979) * San Joaquin Valley, CA - (Extreme)
8-Hr Ozone (2008) * Kern Co (Eastern Kern), CA - (Moderate)
8-Hr Ozone (2008) * San Joaquin Valley, CA - (Extreme)
Kings County
8-Hr Ozone (1997) San Joaquin Valley, CA - (Extreme)
1-Hr Ozone (1979) San Joaquin Valley, CA - (Extreme)
8-Hr Ozone (2008) San Joaquin Valley, CA - (Extreme)
Los Angeles County
8-Hr Ozone (1997) * Los Angeles-San Bernardino Cos. (W Mojave Desert), CA - (Severe 15)
8-Hr Ozone (1997) * Los Angeles-South Coast Air Basin, CA - (Extreme)
1-Hr Ozone (1979) * Los Angeles-South Coast Air Basin, CA - (Extreme)
1-Hr Ozone (1979) * Southeast Desert Modified AQMA, CA - (Severe 17)
8-Hr Ozone (2008) * Los Angeles-San Bernardino Counties (West Mojave Desert), CA - (Severe 15)
8-Hr Ozone (2008) * Los Angeles-South Coast Air Basin, CA - (Extreme)
Madera County
8-Hr Ozone (1997) San Joaquin Valley, CA - (Extreme)
1-Hr Ozone (1979) San Joaquin Valley, CA - (Extreme)
8-Hr Ozone (2008) San Joaquin Valley, CA - (Extreme)
Marin County
8-Hr Ozone (1997) San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) San Francisco Bay Area, CA - (Marginal)
Mariposa County
8-Hr Ozone (1997) Mariposa and Tuolumne Cos (Southern Mtn), CA - (Moderate)
8-Hr Ozone (2008) Mariposa County, CA - (Moderate)
Merced County
8-Hr Ozone (1997) San Joaquin Valley, CA - (Extreme)
1-Hr Ozone (1979) San Joaquin Valley, CA - (Extreme)
8-Hr Ozone (2008) San Joaquin Valley, CA - (Extreme)
Monterey County
1-Hr Ozone (1979) Monterey Bay, CA - (Moderate)
Napa County
8-Hr Ozone (1997) San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) San Francisco Bay Area, CA - (Marginal)
Nevada County
8-Hr Ozone (1997) * Nevada Co. (Western part), CA - (Moderate)
8-Hr Ozone (2008) * Nevada Co. (Western part), CA - (Moderate)
Orange County
8-Hr Ozone (1997) Los Angeles-South Coast Air Basin, CA - (Extreme)
1-Hr Ozone (1979) Los Angeles-South Coast Air Basin, CA - (Extreme)
8-Hr Ozone (2008) Los Angeles-South Coast Air Basin, CA - (Extreme)
Placer County
8-Hr Ozone (1997) * Sacramento Metro, CA - (Severe 15)
1-Hr Ozone (1979) * Sacramento Metro, CA - (Severe 15)
8-Hr Ozone (2008) * Sacramento Metro, CA - (Severe 15)
Riverside County
8-Hr Ozone (1997) * Los Angeles-South Coast Air Basin, CA - (Extreme)
8-Hr Ozone (1997) * Morongo Band of Mission Indians - (Severe 17)
8-Hr Ozone (1997) * Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation - (Severe 17)
8-Hr Ozone (1997) * Riverside Co. (Coachella Valley), CA - (Severe 15)
1-Hr Ozone (1979) * Los Angeles-South Coast Air Basin, CA - (Extreme)
1-Hr Ozone (1979) * Morongo Band of Mission Indians - (Severe 17)
1-Hr Ozone (1979) * Southeast Desert Modified AQMA, CA - (Severe 17)
8-Hr Ozone (2008) * Los Angeles-South Coast Air Basin, CA - (Extreme)
8-Hr Ozone (2008) * Morongo Band of Mission Indians - (Serious)
8-Hr Ozone (2008) * Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation - (Moderate)
8-Hr Ozone (2008) * Riverside Co, (Coachella Valley), CA - (Severe 15)
Sacramento County
8-Hr Ozone (1997) Sacramento Metro, CA - (Severe 15)
1-Hr Ozone (1979) Sacramento Metro, CA - (Severe 15)
8-Hr Ozone (2008) Sacramento Metro, CA - (Severe 15)
San Benito County
1-Hr Ozone (1979) Monterey Bay, CA - (Moderate)
San Bernardino County
8-Hr Ozone (1997) * Los Angeles-San Bernardino Cos. (W Mojave Desert), CA - (Severe 15)
8-Hr Ozone (1997) * Los Angeles-South Coast Air Basin, CA - (Extreme)
1-Hr Ozone (1979) * Los Angeles-South Coast Air Basin, CA - (Extreme)
1-Hr Ozone (1979) * Southeast Desert Modified AQMA, CA - (Severe 17)
8-Hr Ozone (2008) * Los Angeles-San Bernardino Counties (West Mojave Desert), CA - (Severe 15)
8-Hr Ozone (2008) * Los Angeles-South Coast Air Basin, CA - (Extreme)
San Diego County
8-Hr Ozone (1997) * Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation - (Severe 17)
8-Hr Ozone (1997) * San Diego, CA - (Moderate)
1-Hr Ozone (1979) San Diego, CA - (Serious)
8-Hr Ozone (2008) * Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation - (Moderate)
8-Hr Ozone (2008) * San Diego County, CA - (Moderate)
San Francisco County
8-Hr Ozone (1997) San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) San Francisco Bay Area, CA - (Marginal)
San Joaquin County
8-Hr Ozone (1997) San Joaquin Valley, CA - (Extreme)
1-Hr Ozone (1979) San Joaquin Valley, CA - (Extreme)
8-Hr Ozone (2008) San Joaquin Valley, CA - (Extreme)
San Luis Obispo County
8-Hr Ozone (2008) * San Luis Obispo (Eastern San Luis Obispo), CA - (Marginal)
San Mateo County
8-Hr Ozone (1997) San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) San Francisco Bay Area, CA - (Marginal)
Santa Barbara County
1-Hr Ozone (1979) Santa Barbara-Santa Maria-Lompoc, CA - (Serious)
Santa Clara County
8-Hr Ozone (1997) San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) San Francisco Bay Area, CA - (Marginal)
Santa Cruz County
1-Hr Ozone (1979) Monterey Bay, CA - (Moderate)
Solano County
8-Hr Ozone (1997) * Sacramento Metro, CA - (Severe 15)
8-Hr Ozone (1997) * San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) * Sacramento Metro, CA - (Severe 15)
1-Hr Ozone (1979) * San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) * Sacramento Metro, CA - (Severe 15)
8-Hr Ozone (2008) * San Francisco Bay Area, CA - (Marginal)
Sonoma County
8-Hr Ozone (1997) * San Francisco Bay Area, CA - (Marginal)
1-Hr Ozone (1979) * San Francisco Bay Area, CA - (Other)
8-Hr Ozone (2008) * San Francisco Bay Area, CA - (Marginal)
Stanislaus County
8-Hr Ozone (1997) San Joaquin Valley, CA - (Extreme)
1-Hr Ozone (1979) San Joaquin Valley, CA - (Extreme)
8-Hr Ozone (2008) San Joaquin Valley, CA - (Extreme)
Sutter County
8-Hr Ozone (1997) * Sacramento Metro, CA - (Severe 15)
8-Hr Ozone (1997) * Sutter Co (Sutter Buttes), CA - (Marginal)
1-Hr Ozone (1979) * Sacramento Metro, CA - (Severe 15)
1-Hr Ozone (1979) * Yuba City, CA - (Section 185A)
8-Hr Ozone (2008) * Sacramento Metro, CA - (Severe 15)
Tehama County
8-Hr Ozone (2008) * Tuscan Buttes, CA - (Marginal)
Tulare County
8-Hr Ozone (1997) San Joaquin Valley, CA - (Extreme)
1-Hr Ozone (1979) San Joaquin Valley, CA - (Extreme)
8-Hr Ozone (2008) San Joaquin Valley, CA - (Extreme)
Tuolumne County
8-Hr Ozone (1997) Mariposa and Tuolumne Cos (Southern Mtn), CA - (Moderate)
Ventura County
8-Hr Ozone (1997) * Ventura Co, CA - (Serious)
1-Hr Ozone (1979) Ventura Co, CA - (Severe 15)
8-Hr Ozone (2008) * Ventura County, CA - (Serious)
Yolo County
8-Hr Ozone (1997) Sacramento Metro, CA - (Severe 15)
1-Hr Ozone (1979) Sacramento Metro, CA - (Severe 15)
8-Hr Ozone (2008) Sacramento Metro, CA - (Severe 15)
Yuba County
1-Hr Ozone (1979) Yuba City, CA - (Section 185A)
COLORADO
Adams County
8-Hr Ozone (1997) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
1-Hr Ozone (1979) * Denver-Boulder, CO - (Section 185A)
8-Hr Ozone (2008) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
Arapahoe County
8-Hr Ozone (1997) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
1-Hr Ozone (1979) * Denver-Boulder, CO - (Section 185A)
8-Hr Ozone (2008) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
Boulder County
8-Hr Ozone (1997) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
1-Hr Ozone (1979) * Denver-Boulder, CO - (Section 185A)
8-Hr Ozone (2008) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
Broomfield County
8-Hr Ozone (1997) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
1-Hr Ozone (1979) Denver-Boulder, CO - (Section 185A)
8-Hr Ozone (2008) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
Denver County
8-Hr Ozone (1997) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
1-Hr Ozone (1979) Denver-Boulder, CO - (Section 185A)
8-Hr Ozone (2008) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
Douglas County
8-Hr Ozone (1997) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
1-Hr Ozone (1979) Denver-Boulder, CO - (Section 185A)
8-Hr Ozone (2008) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
Jefferson County
8-Hr Ozone (1997) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
1-Hr Ozone (1979) Denver-Boulder, CO - (Section 185A)
8-Hr Ozone (2008) Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
Larimer County
8-Hr Ozone (1997) * Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
8-Hr Ozone (2008) * Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
Weld County
8-Hr Ozone (1997) * Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Marginal)
8-Hr Ozone (2008) * Denver-Boulder-Greeley-Ft. Collins-Loveland, CO - (Moderate)
CONNECTICUT
Fairfield County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) * Greater Connecticut, CT - (Serious)
1-Hr Ozone (1979) * New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Hartford County
8-Hr Ozone (1997) Greater Connecticut, CT - (Moderate)
1-Hr Ozone (1979) Greater Connecticut, CT - (Serious)
8-Hr Ozone (2008) Greater Connecticut, CT - (Moderate)
Litchfield County
8-Hr Ozone (1997) Greater Connecticut, CT - (Moderate)
1-Hr Ozone (1979) * Greater Connecticut, CT - (Serious)
1-Hr Ozone (1979) * New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) Greater Connecticut, CT - (Moderate)
Middlesex County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) Greater Connecticut, CT - (Serious)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
New Haven County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) Greater Connecticut, CT - (Serious)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
New London County
8-Hr Ozone (1997) Greater Connecticut, CT - (Moderate)
1-Hr Ozone (1979) Greater Connecticut, CT - (Serious)
8-Hr Ozone (2008) Greater Connecticut, CT - (Moderate)
Tolland County
8-Hr Ozone (1997) Greater Connecticut, CT - (Moderate)
1-Hr Ozone (1979) Greater Connecticut, CT - (Serious)
8-Hr Ozone (2008) Greater Connecticut, CT - (Moderate)
Windham County
8-Hr Ozone (1997) Greater Connecticut, CT - (Moderate)
1-Hr Ozone (1979) Greater Connecticut, CT - (Serious)
8-Hr Ozone (2008) Greater Connecticut, CT - (Moderate)
DELAWARE
Kent County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
New Castle County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Sussex County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Sussex Co, DE - (Marginal)
8-Hr Ozone (2008) Seaford, DE - (Marginal)
DISTRICT OF COLUMBIA
District of Columbia
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
FLORIDA
Broward County
1-Hr Ozone (1979) Miami-Fort Lauderdale-W. Palm Beach, FL - (Moderate)
Duval County
1-Hr Ozone (1979) Jacksonville, FL - (Section 185A)
Hillsborough County
1-Hr Ozone (1979) Tampa-St. Petersburg-Clearwater, FL - (Marginal)
Miami-Dade County
1-Hr Ozone (1979) Miami-Fort Lauderdale-W. Palm Beach, FL - (Moderate)
Palm Beach County
1-Hr Ozone (1979) Miami-Fort Lauderdale-W. Palm Beach, FL - (Moderate)
Pinellas County
1-Hr Ozone (1979) Tampa-St. Petersburg-Clearwater, FL - (Marginal)
GEORGIA
Barrow County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
Bartow County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Bibb County
8-Hr Ozone (1997) Macon, GA - (Former Subpart 1)
Carroll County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
Cherokee County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Clayton County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Cobb County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Coweta County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
DeKalb County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Douglas County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Fayette County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Forsyth County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Fulton County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Gwinnett County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Hall County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
Henry County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Monroe County
8-Hr Ozone (1997) * Macon, GA - (Former Subpart 1)
Murray County
8-Hr Ozone (1997) * Murray Co (Chattahoochee Nat Forest), GA - (Former Subpart 1)
Newton County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Paulding County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Rockdale County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
1-Hr Ozone (1979) Atlanta, GA - (Severe 15)
8-Hr Ozone (2008) Atlanta, GA - (Moderate)
Spalding County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
Walton County
8-Hr Ozone (1997) Atlanta, GA - (Moderate)
ILLINOIS
Cook County
8-Hr Ozone (1997) Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) Chicago-Naperville, IL-IN-WI - (Moderate)
DuPage County
8-Hr Ozone (1997) Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) Chicago-Naperville, IL-IN-WI - (Moderate)
Grundy County
8-Hr Ozone (1997) * Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) * Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) * Chicago-Naperville, IL-IN-WI - (Moderate)
Jersey County
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) Jersey Co, IL - (Marginal)
Kane County
8-Hr Ozone (1997) Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) Chicago-Naperville, IL-IN-WI - (Moderate)
Kendall County
8-Hr Ozone (1997) * Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) * Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) * Chicago-Naperville, IL-IN-WI - (Moderate)
Lake County
8-Hr Ozone (1997) Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) Chicago-Naperville, IL-IN-WI - (Moderate)
Madison County
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) St. Louis, MO-IL - (Serious)
8-Hr Ozone (2008) St. Louis-St. Charles-Farmington, MO-IL - (Marginal)
McHenry County
8-Hr Ozone (1997) Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) Chicago-Naperville, IL-IN-WI - (Moderate)
Monroe County
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) St. Louis, MO-IL - (Serious)
8-Hr Ozone (2008) St. Louis-St. Charles-Farmington, MO-IL - (Marginal)
St. Clair County
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) St. Louis, MO-IL - (Serious)
8-Hr Ozone (2008) St. Louis-St. Charles-Farmington, MO-IL - (Marginal)
Will County
8-Hr Ozone (1997) Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) Chicago-Naperville, IL-IN-WI - (Moderate)
INDIANA
Allen County
8-Hr Ozone (1997) Fort Wayne, IN - (Former Subpart 1)
Boone County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
Clark County
8-Hr Ozone (1997) Louisville, KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Louisville, KY-IN - (Moderate)
Dearborn County
8-Hr Ozone (1997) * Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
8-Hr Ozone (2008) * Cincinnati, OH-KY-IN - (Marginal)
Delaware County
8-Hr Ozone (1997) Muncie, IN - (Former Subpart 1)
Elkhart County
8-Hr Ozone (1997) South Bend-Elkhart, IN - (Former Subpart 1)
1-Hr Ozone (1979) South Bend-Elkhart, IN - (Marginal)
Floyd County
8-Hr Ozone (1997) Louisville, KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Louisville, KY-IN - (Moderate)
Greene County
8-Hr Ozone (1997) Greene Co, IN - (Former Subpart 1)
Hamilton County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
Hancock County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
Hendricks County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
Jackson County
8-Hr Ozone (1997) Jackson Co, IN - (Former Subpart 1)
Johnson County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
LaPorte County
8-Hr Ozone (1997) La Porte Co., IN - (Marginal)
Lake County
8-Hr Ozone (1997) Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) Chicago-Naperville, IL-IN-WI - (Moderate)
Madison County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
Marion County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
1-Hr Ozone (1979) Indianapolis, IN - (Marginal)
Morgan County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
Porter County
8-Hr Ozone (1997) Chicago-Gary-Lake County, IL-IN - (Moderate)
1-Hr Ozone (1979) Chicago-Gary-Lake County, IL-IN - (Severe 17)
8-Hr Ozone (2008) Chicago-Naperville, IL-IN-WI - (Moderate)
Shelby County
8-Hr Ozone (1997) Indianapolis, IN - (Former Subpart 1)
St. Joseph County
8-Hr Ozone (1997) South Bend-Elkhart, IN - (Former Subpart 1)
1-Hr Ozone (1979) South Bend-Elkhart, IN - (Marginal)
Vanderburgh County
8-Hr Ozone (1997) Evansville, IN - (Former Subpart 1)
1-Hr Ozone (1979) Evansville, IN - (Marginal)
Vigo County
8-Hr Ozone (1997) Terre Haute, IN - (Former Subpart 1)
Warrick County
8-Hr Ozone (1997) Evansville, IN - (Former Subpart 1)
KANSAS
Johnson County
1-Hr Ozone (1979) Kansas City, MO-KS - (Other)
Wyandotte County
1-Hr Ozone (1979) Kansas City, MO-KS - (Other)
KENTUCKY
Boone County
8-Hr Ozone (1997) Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Cincinnati-Hamilton, OH-KY - (Moderate)
8-Hr Ozone (2008) * Cincinnati, OH-KY-IN - (Marginal)
Boyd County
8-Hr Ozone (1997) Huntington-Ashland, WV-KY - (Former Subpart 1)
1-Hr Ozone (1979) Huntington-Ashland, WV-KY - (Moderate)
Bullitt County
8-Hr Ozone (1997) Louisville, KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) * Louisville, KY-IN - (Moderate)
Campbell County
8-Hr Ozone (1997) Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Cincinnati-Hamilton, OH-KY - (Moderate)
8-Hr Ozone (2008) * Cincinnati, OH-KY-IN - (Marginal)
Christian County
8-Hr Ozone (1997) Clarksville-Hopkinsville, TN-KY - (Former Subpart 1)
Daviess County
1-Hr Ozone (1979) Owensboro, KY - (Marginal)
Edmonson County
1-Hr Ozone (1979) Edmonson Co, KY - (Rural Transport (Marginal))
Fayette County
1-Hr Ozone (1979) Lexington-Fayette, KY - (Marginal)
Greenup County
1-Hr Ozone (1979) * Huntington-Ashland, WV-KY - (Moderate)
Hancock County
1-Hr Ozone (1979) * Owensboro, KY - (Marginal)
Jefferson County
8-Hr Ozone (1997) Louisville, KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Louisville, KY-IN - (Moderate)
Kenton County
8-Hr Ozone (1997) Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Cincinnati-Hamilton, OH-KY - (Moderate)
8-Hr Ozone (2008) * Cincinnati, OH-KY-IN - (Marginal)
Livingston County
1-Hr Ozone (1979) * Paducah, KY - (Marginal)
Marshall County
1-Hr Ozone (1979) Paducah, KY - (Marginal)
Oldham County
8-Hr Ozone (1997) Louisville, KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) * Louisville, KY-IN - (Moderate)
Scott County
1-Hr Ozone (1979) Lexington-Fayette, KY - (Marginal)
LOUISIANA
Ascension Parish
8-Hr Ozone (1997) Baton Rouge, LA - (Moderate)
1-Hr Ozone (1979) Baton Rouge, LA - (Severe 15)
8-Hr Ozone (2008) Baton Rouge, LA - (Marginal)
Beauregard Parish
1-Hr Ozone (1979) Beauregard Par, LA - (Incomplete Data)
Calcasieu Parish
1-Hr Ozone (1979) Lake Charles, LA - (Marginal)
East Baton Rouge Parish
8-Hr Ozone (1997) Baton Rouge, LA - (Moderate)
1-Hr Ozone (1979) Baton Rouge, LA - (Severe 15)
8-Hr Ozone (2008) Baton Rouge, LA - (Marginal)
Grant Parish
1-Hr Ozone (1979) Grant Par, LA - (Incomplete Data)
Iberville Parish
8-Hr Ozone (1997) Baton Rouge, LA - (Moderate)
1-Hr Ozone (1979) Baton Rouge, LA - (Severe 15)
8-Hr Ozone (2008) Baton Rouge, LA - (Marginal)
Jefferson Parish
1-Hr Ozone (1979) New Orleans, LA - (Section 185A)
Lafayette Parish
1-Hr Ozone (1979) Lafayette, LA - (Section 185A)
Lafourche Parish
1-Hr Ozone (1979) Lafourche Par, LA - (Incomplete Data)
Livingston Parish
8-Hr Ozone (1997) Baton Rouge, LA - (Moderate)
1-Hr Ozone (1979) Baton Rouge, LA - (Severe 15)
8-Hr Ozone (2008) Baton Rouge, LA - (Marginal)
Orleans Parish
1-Hr Ozone (1979) New Orleans, LA - (Section 185A)
Pointe Coupee Parish
1-Hr Ozone (1979) Pointe Coupee Parish, LA - (Marginal)
St. Bernard Parish
1-Hr Ozone (1979) New Orleans, LA - (Section 185A)
St. Charles Parish
1-Hr Ozone (1979) New Orleans, LA - (Section 185A)
St. James Parish
1-Hr Ozone (1979) St James Par, LA - (Incomplete Data)
St. Mary Parish
1-Hr Ozone (1979) St Mary Par, LA - (Incomplete Data)
West Baton Rouge Parish
8-Hr Ozone (1997) Baton Rouge, LA - (Moderate)
1-Hr Ozone (1979) Baton Rouge, LA - (Severe 15)
8-Hr Ozone (2008) Baton Rouge, LA - (Marginal)
MAINE
Androscoggin County
8-Hr Ozone (1997) * Portland, ME - (Marginal)
1-Hr Ozone (1979) Lewiston-Auburn, ME - (Moderate)
Cumberland County
8-Hr Ozone (1997) * Portland, ME - (Marginal)
1-Hr Ozone (1979) Portland, ME - (Moderate)
Hancock County
8-Hr Ozone (1997) * Hancock, Knox, Lincoln and Waldo Cos, ME - (Former Subpart 1)
1-Hr Ozone (1979) Hancock & Waldo Cos, ME - (Marginal)
Kennebec County
1-Hr Ozone (1979) Lewiston-Auburn, ME - (Moderate)
Knox County
8-Hr Ozone (1997) * Hancock, Knox, Lincoln and Waldo Cos, ME - (Former Subpart 1)
1-Hr Ozone (1979) Knox & Lincoln Co.s, ME - (Moderate)
Lincoln County
8-Hr Ozone (1997) * Hancock, Knox, Lincoln and Waldo Cos, ME - (Former Subpart 1)
1-Hr Ozone (1979) Knox & Lincoln Co.s, ME - (Moderate)
Sagadahoc County
8-Hr Ozone (1997) Portland, ME - (Marginal)
1-Hr Ozone (1979) Portland, ME - (Moderate)
Waldo County
8-Hr Ozone (1997) * Hancock, Knox, Lincoln and Waldo Cos, ME - (Former Subpart 1)
1-Hr Ozone (1979) Hancock & Waldo Cos, ME - (Marginal)
York County
8-Hr Ozone (1997) * Portland, ME - (Marginal)
1-Hr Ozone (1979) Portland, ME - (Moderate)
MARYLAND
Anne Arundel County
8-Hr Ozone (1997) Baltimore, MD - (Serious)
1-Hr Ozone (1979) Baltimore, MD - (Severe 15)
8-Hr Ozone (2008) Baltimore, MD - (Moderate)
Baltimore County
8-Hr Ozone (1997) Baltimore, MD - (Serious)
1-Hr Ozone (1979) Baltimore, MD - (Severe 15)
8-Hr Ozone (2008) Baltimore, MD - (Moderate)
Baltimore city
8-Hr Ozone (1997) Baltimore, MD - (Serious)
1-Hr Ozone (1979) Baltimore, MD - (Severe 15)
8-Hr Ozone (2008) Baltimore, MD - (Moderate)
Calvert County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Carroll County
8-Hr Ozone (1997) Baltimore, MD - (Serious)
1-Hr Ozone (1979) Baltimore, MD - (Severe 15)
8-Hr Ozone (2008) Baltimore, MD - (Moderate)
Cecil County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Charles County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Frederick County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Harford County
8-Hr Ozone (1997) Baltimore, MD - (Serious)
1-Hr Ozone (1979) Baltimore, MD - (Severe 15)
8-Hr Ozone (2008) Baltimore, MD - (Moderate)
Howard County
8-Hr Ozone (1997) Baltimore, MD - (Serious)
1-Hr Ozone (1979) Baltimore, MD - (Severe 15)
8-Hr Ozone (2008) Baltimore, MD - (Moderate)
Kent County
8-Hr Ozone (1997) Kent and Queen Anne's Cos, MD - (Marginal)
1-Hr Ozone (1979) Kent and Queen Anne's Co.s, MD - (Marginal)
Montgomery County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Prince George's County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Queen Anne's County
8-Hr Ozone (1997) Kent and Queen Anne's Cos, MD - (Marginal)
1-Hr Ozone (1979) Kent and Queen Anne's Co.s, MD - (Marginal)
MASSACHUSETTS
Barnstable County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
Berkshire County
8-Hr Ozone (1997) Springfield (W. Mass), MA - (Moderate)
1-Hr Ozone (1979) Springfield (Western MA), MA - (Serious)
Bristol County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
Dukes County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
8-Hr Ozone (2008) Dukes County, MA - (Marginal)
Essex County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
Franklin County
8-Hr Ozone (1997) Springfield (W. Mass), MA - (Moderate)
1-Hr Ozone (1979) Springfield (Western MA), MA - (Serious)
Hampden County
8-Hr Ozone (1997) Springfield (W. Mass), MA - (Moderate)
1-Hr Ozone (1979) Springfield (Western MA), MA - (Serious)
Hampshire County
8-Hr Ozone (1997) Springfield (W. Mass), MA - (Moderate)
1-Hr Ozone (1979) Springfield (Western MA), MA - (Serious)
Middlesex County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
Nantucket County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
Norfolk County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
Plymouth County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
Suffolk County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
Worcester County
8-Hr Ozone (1997) Boston-Lawrence-Worcester (E. Mass), MA - (Moderate)
1-Hr Ozone (1979) Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
MICHIGAN
Allegan County
8-Hr Ozone (1997) Allegan Co, MI - (Former Subpart 1)
1-Hr Ozone (1979) Allegan Co, MI - (Incomplete Data)
Bay County
1-Hr Ozone (1979) Saginaw-Bay City-Midland, MI - (Incomplete Data)
Benzie County
8-Hr Ozone (1997) Benzie Co, MI - (Former Subpart 1)
Berrien County
8-Hr Ozone (1997) Benton Harbor, MI - (Former Subpart 1)
Calhoun County
8-Hr Ozone (1997) Kalamazoo-Battle Creek, MI - (Former Subpart 1)
Cass County
8-Hr Ozone (1997) Cass Co, MI - (Marginal)
Clinton County
8-Hr Ozone (1997) Lansing-East Lansing, MI - (Former Subpart 1)
Eaton County
8-Hr Ozone (1997) Lansing-East Lansing, MI - (Former Subpart 1)
Genesee County
8-Hr Ozone (1997) Flint, MI - (Former Subpart 1)
1-Hr Ozone (1979) Flint, MI - (Section 185A)
Huron County
8-Hr Ozone (1997) Huron Co, MI - (Former Subpart 1)
Ingham County
8-Hr Ozone (1997) Lansing-East Lansing, MI - (Former Subpart 1)
Kalamazoo County
8-Hr Ozone (1997) Kalamazoo-Battle Creek, MI - (Former Subpart 1)
Kent County
8-Hr Ozone (1997) Grand Rapids, MI - (Former Subpart 1)
1-Hr Ozone (1979) Grand Rapids, MI - (Moderate)
Lapeer County
8-Hr Ozone (1997) Flint, MI - (Former Subpart 1)
Lenawee County
8-Hr Ozone (1997) Detroit-Ann Arbor, MI - (Marginal)
Livingston County
8-Hr Ozone (1997) Detroit-Ann Arbor, MI - (Marginal)
1-Hr Ozone (1979) Detroit-Ann Arbor, MI - (Moderate)
Macomb County
8-Hr Ozone (1997) Detroit-Ann Arbor, MI - (Marginal)
1-Hr Ozone (1979) Detroit-Ann Arbor, MI - (Moderate)
Mason County
8-Hr Ozone (1997) Mason Co, MI - (Former Subpart 1)
Midland County
1-Hr Ozone (1979) Saginaw-Bay City-Midland, MI - (Incomplete Data)
Monroe County
8-Hr Ozone (1997) Detroit-Ann Arbor, MI - (Marginal)
1-Hr Ozone (1979) Detroit-Ann Arbor, MI - (Moderate)
Muskegon County
8-Hr Ozone (1997) Muskegon, MI - (Marginal)
1-Hr Ozone (1979) Muskegon, MI - (Moderate)
Oakland County
8-Hr Ozone (1997) Detroit-Ann Arbor, MI - (Marginal)
1-Hr Ozone (1979) Detroit-Ann Arbor, MI - (Moderate)
Ottawa County
8-Hr Ozone (1997) Grand Rapids, MI - (Former Subpart 1)
1-Hr Ozone (1979) Grand Rapids, MI - (Moderate)
Saginaw County
1-Hr Ozone (1979) Saginaw-Bay City-Midland, MI - (Incomplete Data)
St. Clair County
8-Hr Ozone (1997) Detroit-Ann Arbor, MI - (Marginal)
1-Hr Ozone (1979) Detroit-Ann Arbor, MI - (Moderate)
Van Buren County
8-Hr Ozone (1997) Kalamazoo-Battle Creek, MI - (Former Subpart 1)
Washtenaw County
8-Hr Ozone (1997) Detroit-Ann Arbor, MI - (Marginal)
1-Hr Ozone (1979) Detroit-Ann Arbor, MI - (Moderate)
Wayne County
8-Hr Ozone (1997) Detroit-Ann Arbor, MI - (Marginal)
1-Hr Ozone (1979) Detroit-Ann Arbor, MI - (Moderate)
MISSISSIPPI
DeSoto County
8-Hr Ozone (2008) * Memphis, TN-MS-AR - (Marginal)
MISSOURI
Clay County
1-Hr Ozone (1979) Kansas City, MO-KS - (Other)
Franklin County
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) St. Louis, MO-IL - (Serious)
8-Hr Ozone (2008) St. Louis-St. Charles-Farmington, MO-IL - (Marginal)
Jackson County
1-Hr Ozone (1979) Kansas City, MO-KS - (Other)
Jefferson County
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) St. Louis, MO-IL - (Serious)
8-Hr Ozone (2008) St. Louis-St. Charles-Farmington, MO-IL - (Marginal)
Platte County
1-Hr Ozone (1979) Kansas City, MO-KS - (Other)
St. Charles County
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) St. Louis, MO-IL - (Serious)
8-Hr Ozone (2008) St. Louis-St. Charles-Farmington, MO-IL - (Marginal)
St. Louis County
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) St. Louis, MO-IL - (Serious)
8-Hr Ozone (2008) St. Louis-St. Charles-Farmington, MO-IL - (Marginal)
St. Louis city
8-Hr Ozone (1997) St. Louis, MO-IL - (Moderate)
1-Hr Ozone (1979) St. Louis, MO-IL - (Serious)
8-Hr Ozone (2008) St. Louis-St. Charles-Farmington, MO-IL - (Marginal)
NEVADA
Clark County
8-Hr Ozone (1997) * Las Vegas, NV - (Marginal)
Washoe County
1-Hr Ozone (1979) Reno, NV - (Marginal)
NEW HAMPSHIRE
Cheshire County
1-Hr Ozone (1979) Cheshire Co, NH - (Incomplete Data)
Hillsborough County
8-Hr Ozone (1997) * Boston-Manchester-Portsmouth (SE), NH - (Moderate)
1-Hr Ozone (1979) * Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
1-Hr Ozone (1979) * Manchester, NH - (Marginal)
Merrimack County
8-Hr Ozone (1997) * Boston-Manchester-Portsmouth (SE), NH - (Moderate)
1-Hr Ozone (1979) Manchester, NH - (Marginal)
Rockingham County
8-Hr Ozone (1997) * Boston-Manchester-Portsmouth (SE), NH - (Moderate)
1-Hr Ozone (1979) * Boston-Lawrence-Worcester (E. Mass), MA-NH - (Serious)
1-Hr Ozone (1979) * Manchester, NH - (Marginal)
1-Hr Ozone (1979) * Portsmouth-Dover-Rochester, NH - (Serious)
Strafford County
8-Hr Ozone (1997) * Boston-Manchester-Portsmouth (SE), NH - (Moderate)
1-Hr Ozone (1979) Portsmouth-Dover-Rochester, NH - (Serious)
NEW JERSEY
Atlantic County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Atlantic City, NJ - (Moderate)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Bergen County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Burlington County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Camden County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Cape May County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Atlantic City, NJ - (Moderate)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Cumberland County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Essex County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Gloucester County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Hudson County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Hunterdon County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Mercer County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Middlesex County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Monmouth County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Morris County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Ocean County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Passaic County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Salem County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Somerset County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Sussex County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Union County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Warren County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) Allentown-Bethlehem-Easton, PA-NJ - (Marginal)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
NEW MEXICO
Dona Ana County
1-Hr Ozone (1979) * Sunland Park, NM (New Area 1995) - (Marginal)
NEW YORK
Albany County
8-Hr Ozone (1997) Albany-Schenectady-Troy, NY - (Marginal)
1-Hr Ozone (1979) Albany-Schenectady-Troy, NY - (Marginal)
Bronx County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Chautauqua County
8-Hr Ozone (1997) Jamestown, NY - (Moderate)
8-Hr Ozone (2008) Jamestown, NY - (Marginal)
Dutchess County
8-Hr Ozone (1997) Poughkeepsie, NY - (Moderate)
1-Hr Ozone (1979) Poughkeepsie, NY - (Moderate)
Erie County
8-Hr Ozone (1997) Buffalo-Niagara Falls, NY - (Moderate)
1-Hr Ozone (1979) Buffalo-Niagara Falls, NY - (Marginal)
Essex County
8-Hr Ozone (1997) * Essex Co (Whiteface Mtn), NY - (Marginal)
1-Hr Ozone (1979) * Essex Co, NY - (Rural Transport (Marginal))
Genesee County
8-Hr Ozone (1997) Rochester, NY - (Marginal)
Greene County
8-Hr Ozone (1997) Albany-Schenectady-Troy, NY - (Marginal)
1-Hr Ozone (1979) Albany-Schenectady-Troy, NY - (Marginal)
Jefferson County
8-Hr Ozone (1997) Jefferson Co, NY - (Moderate)
1-Hr Ozone (1979) Jefferson Co, NY - (Marginal)
Kings County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Livingston County
8-Hr Ozone (1997) Rochester, NY - (Marginal)
Monroe County
8-Hr Ozone (1997) Rochester, NY - (Marginal)
Montgomery County
8-Hr Ozone (1997) Albany-Schenectady-Troy, NY - (Marginal)
1-Hr Ozone (1979) Albany-Schenectady-Troy, NY - (Marginal)
Nassau County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
New York County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Niagara County
8-Hr Ozone (1997) Buffalo-Niagara Falls, NY - (Moderate)
1-Hr Ozone (1979) Buffalo-Niagara Falls, NY - (Marginal)
Ontario County
8-Hr Ozone (1997) Rochester, NY - (Marginal)
Orange County
8-Hr Ozone (1997) Poughkeepsie, NY - (Moderate)
1-Hr Ozone (1979) * New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
1-Hr Ozone (1979) * Poughkeepsie, NY - (Moderate)
Orleans County
8-Hr Ozone (1997) Rochester, NY - (Marginal)
Putnam County
8-Hr Ozone (1997) Poughkeepsie, NY - (Moderate)
1-Hr Ozone (1979) Poughkeepsie, NY - (Moderate)
Queens County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Rensselaer County
8-Hr Ozone (1997) Albany-Schenectady-Troy, NY - (Marginal)
1-Hr Ozone (1979) Albany-Schenectady-Troy, NY - (Marginal)
Richmond County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Rockland County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Saratoga County
8-Hr Ozone (1997) Albany-Schenectady-Troy, NY - (Marginal)
1-Hr Ozone (1979) Albany-Schenectady-Troy, NY - (Marginal)
Schenectady County
8-Hr Ozone (1997) Albany-Schenectady-Troy, NY - (Marginal)
1-Hr Ozone (1979) Albany-Schenectady-Troy, NY - (Marginal)
Schoharie County
8-Hr Ozone (1997) Albany-Schenectady-Troy, NY - (Marginal)
Suffolk County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
Wayne County
8-Hr Ozone (1997) Rochester, NY - (Marginal)
Westchester County
8-Hr Ozone (1997) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
1-Hr Ozone (1979) New York-N. New Jersey-Long Island, NY-NJ-CT - (Severe 17)
8-Hr Ozone (2008) New York-N. New Jersey-Long Island, NY-NJ-CT - (Moderate)
NORTH CAROLINA
Cabarrus County
8-Hr Ozone (1997) Charlotte-Gastonia-Rock Hill, NC-SC - (Moderate)
8-Hr Ozone (2008) * Charlotte-Rock Hill, NC-SC - (Marginal)
Chatham County
8-Hr Ozone (1997) * Raleigh-Durham-Chapel Hill, NC - (Former Subpart 1)
Davidson County
1-Hr Ozone (1979) Greensboro-Winston-Salem-High Point, NC - (Moderate)
Davie County
1-Hr Ozone (1979) * Greensboro-Winston-Salem-High Point, NC - (Moderate)
Durham County
8-Hr Ozone (1997) Raleigh-Durham-Chapel Hill, NC - (Former Subpart 1)
1-Hr Ozone (1979) Raleigh-Durham, NC - (Moderate)
Edgecombe County
8-Hr Ozone (1997) Rocky Mount, NC - (Former Subpart 1)
Forsyth County
1-Hr Ozone (1979) Greensboro-Winston-Salem-High Point, NC - (Moderate)
Franklin County
8-Hr Ozone (1997) Raleigh-Durham-Chapel Hill, NC - (Former Subpart 1)
Gaston County
8-Hr Ozone (1997) Charlotte-Gastonia-Rock Hill, NC-SC - (Moderate)
1-Hr Ozone (1979) Charlotte-Gastonia, NC - (Moderate)
8-Hr Ozone (2008) * Charlotte-Rock Hill, NC-SC - (Marginal)
Granville County
8-Hr Ozone (1997) Raleigh-Durham-Chapel Hill, NC - (Former Subpart 1)
1-Hr Ozone (1979) * Raleigh-Durham, NC - (Moderate)
Guilford County
1-Hr Ozone (1979) Greensboro-Winston-Salem-High Point, NC - (Moderate)
Haywood County
8-Hr Ozone (1997) * Haywood and Swain Cos (Great Smoky NP), NC - (Former Subpart 1)
Iredell County
8-Hr Ozone (1997) * Charlotte-Gastonia-Rock Hill, NC-SC - (Moderate)
8-Hr Ozone (2008) * Charlotte-Rock Hill, NC-SC - (Marginal)
Johnston County
8-Hr Ozone (1997) Raleigh-Durham-Chapel Hill, NC - (Former Subpart 1)
Lincoln County
8-Hr Ozone (1997) Charlotte-Gastonia-Rock Hill, NC-SC - (Moderate)
8-Hr Ozone (2008) * Charlotte-Rock Hill, NC-SC - (Marginal)
Mecklenburg County
8-Hr Ozone (1997) Charlotte-Gastonia-Rock Hill, NC-SC - (Moderate)
1-Hr Ozone (1979) Charlotte-Gastonia, NC - (Moderate)
8-Hr Ozone (2008) Charlotte-Rock Hill, NC-SC - (Marginal)
Nash County
8-Hr Ozone (1997) Rocky Mount, NC - (Former Subpart 1)
Orange County
8-Hr Ozone (1997) Raleigh-Durham-Chapel Hill, NC - (Former Subpart 1)
Person County
8-Hr Ozone (1997) Raleigh-Durham-Chapel Hill, NC - (Former Subpart 1)
Rowan County
8-Hr Ozone (1997) Charlotte-Gastonia-Rock Hill, NC-SC - (Moderate)
8-Hr Ozone (2008) * Charlotte-Rock Hill, NC-SC - (Marginal)
Swain County
8-Hr Ozone (1997) * Haywood and Swain Cos (Great Smoky NP), NC - (Former Subpart 1)
Union County
8-Hr Ozone (1997) Charlotte-Gastonia-Rock Hill, NC-SC - (Moderate)
8-Hr Ozone (2008) * Charlotte-Rock Hill, NC-SC - (Marginal)
Wake County
8-Hr Ozone (1997) Raleigh-Durham-Chapel Hill, NC - (Former Subpart 1)
1-Hr Ozone (1979) Raleigh-Durham, NC - (Moderate)
OHIO
Allen County
8-Hr Ozone (1997) Lima, OH - (Former Subpart 1)
Ashtabula County
8-Hr Ozone (1997) Cleveland-Akron-Lorain, OH - (Moderate)
1-Hr Ozone (1979) Cleveland-Akron-Lorain, OH - (Moderate)
8-Hr Ozone (2008) Cleveland-Akron-Lorain, OH - (Marginal)
Belmont County
8-Hr Ozone (1997) Wheeling, WV-OH - (Former Subpart 1)
Butler County
8-Hr Ozone (1997) Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Cincinnati-Hamilton, OH-KY - (Moderate)
8-Hr Ozone (2008) Cincinnati, OH-KY-IN - (Marginal)
Clark County
8-Hr Ozone (1997) Dayton-Springfield, OH - (Former Subpart 1)
1-Hr Ozone (1979) Dayton-Springfield, OH - (Moderate)
Clermont County
8-Hr Ozone (1997) Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Cincinnati-Hamilton, OH-KY - (Moderate)
8-Hr Ozone (2008) Cincinnati, OH-KY-IN - (Marginal)
Clinton County
8-Hr Ozone (1997) Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Clinton Co, OH - (Section 185A)
8-Hr Ozone (2008) Cincinnati, OH-KY-IN - (Marginal)
Columbiana County
8-Hr Ozone (1997) Youngstown-Warren-Sharon, OH-PA - (Former Subpart 1)
1-Hr Ozone (1979) Columbiana Co, OH - (Incomplete Data)
Cuyahoga County
8-Hr Ozone (1997) Cleveland-Akron-Lorain, OH - (Moderate)
1-Hr Ozone (1979) Cleveland-Akron-Lorain, OH - (Moderate)
8-Hr Ozone (2008) Cleveland-Akron-Lorain, OH - (Marginal)
Delaware County
8-Hr Ozone (1997) Columbus, OH - (Former Subpart 1)
1-Hr Ozone (1979) Columbus, OH - (Marginal)
8-Hr Ozone (2008) Columbus, OH - (Marginal)
Fairfield County
8-Hr Ozone (1997) Columbus, OH - (Former Subpart 1)
8-Hr Ozone (2008) Columbus, OH - (Marginal)
Franklin County
8-Hr Ozone (1997) Columbus, OH - (Former Subpart 1)
1-Hr Ozone (1979) Columbus, OH - (Marginal)
8-Hr Ozone (2008) Columbus, OH - (Marginal)
Geauga County
8-Hr Ozone (1997) Cleveland-Akron-Lorain, OH - (Moderate)
1-Hr Ozone (1979) Cleveland-Akron-Lorain, OH - (Moderate)
8-Hr Ozone (2008) Cleveland-Akron-Lorain, OH - (Marginal)
Greene County
8-Hr Ozone (1997) Dayton-Springfield, OH - (Former Subpart 1)
1-Hr Ozone (1979) Dayton-Springfield, OH - (Moderate)
Hamilton County
8-Hr Ozone (1997) Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Cincinnati-Hamilton, OH-KY - (Moderate)
8-Hr Ozone (2008) Cincinnati, OH-KY-IN - (Marginal)
Jefferson County
8-Hr Ozone (1997) Steubenville-Weirton, OH-WV - (Former Subpart 1)
1-Hr Ozone (1979) Steubenville, OH - (Section 185A)
Knox County
8-Hr Ozone (1997) Columbus, OH - (Former Subpart 1)
8-Hr Ozone (2008) Columbus, OH - (Marginal)
Lake County
8-Hr Ozone (1997) Cleveland-Akron-Lorain, OH - (Moderate)
1-Hr Ozone (1979) Cleveland-Akron-Lorain, OH - (Moderate)
8-Hr Ozone (2008) Cleveland-Akron-Lorain, OH - (Marginal)
Licking County
8-Hr Ozone (1997) Columbus, OH - (Former Subpart 1)
1-Hr Ozone (1979) Columbus, OH - (Marginal)
8-Hr Ozone (2008) Columbus, OH - (Marginal)
Lorain County
8-Hr Ozone (1997) Cleveland-Akron-Lorain, OH - (Moderate)
1-Hr Ozone (1979) Cleveland-Akron-Lorain, OH - (Moderate)
8-Hr Ozone (2008) Cleveland-Akron-Lorain, OH - (Marginal)
Lucas County
8-Hr Ozone (1997) Toledo, OH - (Former Subpart 1)
1-Hr Ozone (1979) Toledo, OH - (Moderate)
Madison County
8-Hr Ozone (1997) Columbus, OH - (Former Subpart 1)
8-Hr Ozone (2008) Columbus, OH - (Marginal)
Mahoning County
8-Hr Ozone (1997) Youngstown-Warren-Sharon, OH-PA - (Former Subpart 1)
1-Hr Ozone (1979) Youngstown-Warren-Sharon, OH-PA (OH portion) - (Marginal)
Medina County
8-Hr Ozone (1997) Cleveland-Akron-Lorain, OH - (Moderate)
1-Hr Ozone (1979) Cleveland-Akron-Lorain, OH - (Moderate)
8-Hr Ozone (2008) Cleveland-Akron-Lorain, OH - (Marginal)
Miami County
8-Hr Ozone (1997) Dayton-Springfield, OH - (Former Subpart 1)
1-Hr Ozone (1979) Dayton-Springfield, OH - (Moderate)
Montgomery County
8-Hr Ozone (1997) Dayton-Springfield, OH - (Former Subpart 1)
1-Hr Ozone (1979) Dayton-Springfield, OH - (Moderate)
Portage County
8-Hr Ozone (1997) Cleveland-Akron-Lorain, OH - (Moderate)
1-Hr Ozone (1979) Cleveland-Akron-Lorain, OH - (Moderate)
8-Hr Ozone (2008) Cleveland-Akron-Lorain, OH - (Marginal)
Preble County
1-Hr Ozone (1979) Preble Co, OH - (Section 185A)
Stark County
8-Hr Ozone (1997) Canton-Massillon, OH - (Former Subpart 1)
1-Hr Ozone (1979) Canton, OH - (Marginal)
Summit County
8-Hr Ozone (1997) Cleveland-Akron-Lorain, OH - (Moderate)
1-Hr Ozone (1979) Cleveland-Akron-Lorain, OH - (Moderate)
8-Hr Ozone (2008) Cleveland-Akron-Lorain, OH - (Marginal)
Trumbull County
8-Hr Ozone (1997) Youngstown-Warren-Sharon, OH-PA - (Former Subpart 1)
1-Hr Ozone (1979) Youngstown-Warren-Sharon, OH-PA (OH portion) - (Marginal)
Warren County
8-Hr Ozone (1997) Cincinnati-Hamilton, OH-KY-IN - (Former Subpart 1)
1-Hr Ozone (1979) Cincinnati-Hamilton, OH-KY - (Moderate)
8-Hr Ozone (2008) Cincinnati, OH-KY-IN - (Marginal)
Washington County
8-Hr Ozone (1997) Parkersburg-Marietta, WV-OH - (Former Subpart 1)
Wood County
8-Hr Ozone (1997) Toledo, OH - (Former Subpart 1)
1-Hr Ozone (1979) Toledo, OH - (Moderate)
OREGON
Clackamas County
1-Hr Ozone (1979) * Portland-Vancouver AQMA, OR-WA - (Marginal)
Marion County
1-Hr Ozone (1979) * Salem, OR - (Incomplete Data)
Multnomah County
1-Hr Ozone (1979) * Portland-Vancouver AQMA, OR-WA - (Marginal)
Polk County
1-Hr Ozone (1979) * Salem, OR - (Incomplete Data)
Washington County
1-Hr Ozone (1979) * Portland-Vancouver AQMA, OR-WA - (Marginal)
PENNSYLVANIA
Adams County
8-Hr Ozone (1997) York, PA - (Former Subpart 1)
1-Hr Ozone (1979) York, PA - (Marginal)
Allegheny County
8-Hr Ozone (1997) Pittsburgh-Beaver Valley, PA - (Moderate)
1-Hr Ozone (1979) Pittsburgh-Beaver Valley, PA - (Moderate)
8-Hr Ozone (2008) Pittsburgh-Beaver Valley, PA - (Marginal)
Armstrong County
8-Hr Ozone (1997) Pittsburgh-Beaver Valley, PA - (Moderate)
1-Hr Ozone (1979) Pittsburgh-Beaver Valley, PA - (Moderate)
8-Hr Ozone (2008) Pittsburgh-Beaver Valley, PA - (Marginal)
Beaver County
8-Hr Ozone (1997) Pittsburgh-Beaver Valley, PA - (Moderate)
1-Hr Ozone (1979) Pittsburgh-Beaver Valley, PA - (Moderate)
8-Hr Ozone (2008) Pittsburgh-Beaver Valley, PA - (Marginal)
Berks County
8-Hr Ozone (1997) Reading, PA - (Former Subpart 1)
1-Hr Ozone (1979) Reading, PA - (Moderate)
8-Hr Ozone (2008) Reading, PA - (Marginal)
Blair County
8-Hr Ozone (1997) Altoona, PA - (Former Subpart 1)
1-Hr Ozone (1979) Altoona, PA - (Marginal)
Bucks County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Butler County
8-Hr Ozone (1997) Pittsburgh-Beaver Valley, PA - (Moderate)
1-Hr Ozone (1979) Pittsburgh-Beaver Valley, PA - (Moderate)
8-Hr Ozone (2008) Pittsburgh-Beaver Valley, PA - (Marginal)
Cambria County
8-Hr Ozone (1997) Johnstown, PA - (Former Subpart 1)
1-Hr Ozone (1979) Johnstown, PA - (Marginal)
Carbon County
8-Hr Ozone (1997) Allentown-Bethlehem-Easton, PA - (Former Subpart 1)
1-Hr Ozone (1979) Allentown-Bethlehem-Easton, PA-NJ - (Marginal)
8-Hr Ozone (2008) Allentown-Bethlehem-Easton, PA - (Marginal)
Centre County
8-Hr Ozone (1997) State College, PA - (Former Subpart 1)
Chester County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Clearfield County
8-Hr Ozone (1997) Clearfield and Indiana Cos, PA - (Former Subpart 1)
Columbia County
1-Hr Ozone (1979) Scranton-Wilkes-Barre, PA - (Marginal)
Crawford County
1-Hr Ozone (1979) Crawford Co, PA - (Incomplete Data)
Cumberland County
8-Hr Ozone (1997) Harrisburg-Lebanon-Carlisle, PA - (Former Subpart 1)
1-Hr Ozone (1979) Harrisburg-Lebanon-Carlisle, PA - (Marginal)
Dauphin County
8-Hr Ozone (1997) Harrisburg-Lebanon-Carlisle, PA - (Former Subpart 1)
1-Hr Ozone (1979) Harrisburg-Lebanon-Carlisle, PA - (Marginal)
Delaware County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Erie County
8-Hr Ozone (1997) Erie, PA - (Former Subpart 1)
1-Hr Ozone (1979) Erie, PA - (Marginal)
Fayette County
8-Hr Ozone (1997) Pittsburgh-Beaver Valley, PA - (Moderate)
1-Hr Ozone (1979) Pittsburgh-Beaver Valley, PA - (Moderate)
8-Hr Ozone (2008) Pittsburgh-Beaver Valley, PA - (Marginal)
Franklin County
8-Hr Ozone (1997) Franklin Co, PA - (Former Subpart 1)
1-Hr Ozone (1979) Franklin Co, PA - (Incomplete Data)
Greene County
8-Hr Ozone (1997) Greene Co, PA - (Former Subpart 1)
1-Hr Ozone (1979) Greene Co, PA - (Incomplete Data)
Indiana County
8-Hr Ozone (1997) Clearfield and Indiana Cos, PA - (Former Subpart 1)
Juniata County
1-Hr Ozone (1979) Juniata Co, PA - (Incomplete Data)
Lackawanna County
8-Hr Ozone (1997) Scranton-Wilkes-Barre, PA - (Former Subpart 1)
1-Hr Ozone (1979) Scranton-Wilkes-Barre, PA - (Marginal)
Lancaster County
8-Hr Ozone (1997) Lancaster, PA - (Marginal)
1-Hr Ozone (1979) Lancaster, PA - (Marginal)
8-Hr Ozone (2008) Lancaster, PA - (Marginal)
Lawrence County
1-Hr Ozone (1979) Lawrence Co, PA - (Incomplete Data)
Lebanon County
8-Hr Ozone (1997) Harrisburg-Lebanon-Carlisle, PA - (Former Subpart 1)
1-Hr Ozone (1979) Harrisburg-Lebanon-Carlisle, PA - (Marginal)
Lehigh County
8-Hr Ozone (1997) Allentown-Bethlehem-Easton, PA - (Former Subpart 1)
1-Hr Ozone (1979) Allentown-Bethlehem-Easton, PA-NJ - (Marginal)
8-Hr Ozone (2008) Allentown-Bethlehem-Easton, PA - (Marginal)
Luzerne County
8-Hr Ozone (1997) Scranton-Wilkes-Barre, PA - (Former Subpart 1)
1-Hr Ozone (1979) Scranton-Wilkes-Barre, PA - (Marginal)
Mercer County
8-Hr Ozone (1997) Youngstown-Warren-Sharon, OH-PA - (Former Subpart 1)
1-Hr Ozone (1979) Youngstown-Warren-Sharon, OH-PA (PA portion) - (Marginal)
Monroe County
8-Hr Ozone (1997) Scranton-Wilkes-Barre, PA - (Former Subpart 1)
1-Hr Ozone (1979) Scranton-Wilkes-Barre, PA - (Marginal)
Montgomery County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Northampton County
8-Hr Ozone (1997) Allentown-Bethlehem-Easton, PA - (Former Subpart 1)
1-Hr Ozone (1979) Allentown-Bethlehem-Easton, PA-NJ - (Marginal)
8-Hr Ozone (2008) Allentown-Bethlehem-Easton, PA - (Marginal)
Northumberland County
1-Hr Ozone (1979) Northumberland Co, PA - (Incomplete Data)
Perry County
8-Hr Ozone (1997) Harrisburg-Lebanon-Carlisle, PA - (Former Subpart 1)
1-Hr Ozone (1979) Harrisburg-Lebanon-Carlisle, PA - (Marginal)
Philadelphia County
8-Hr Ozone (1997) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Moderate)
1-Hr Ozone (1979) Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD - (Severe 15)
8-Hr Ozone (2008) Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE - (Marginal)
Pike County
1-Hr Ozone (1979) Pike Co, PA - (Incomplete Data)
Schuylkill County
1-Hr Ozone (1979) Schuylkill Co, PA - (Incomplete Data)
Snyder County
1-Hr Ozone (1979) Snyder Co, PA - (Incomplete Data)
Somerset County
1-Hr Ozone (1979) Johnstown, PA - (Marginal)
Susquehanna County
1-Hr Ozone (1979) Susquehanna Co, PA - (Incomplete Data)
Tioga County
8-Hr Ozone (1997) Tioga Co, PA - (Former Subpart 1)
Warren County
1-Hr Ozone (1979) Warren Co, PA - (Incomplete Data)
Washington County
8-Hr Ozone (1997) Pittsburgh-Beaver Valley, PA - (Moderate)
1-Hr Ozone (1979) Pittsburgh-Beaver Valley, PA - (Moderate)
8-Hr Ozone (2008) Pittsburgh-Beaver Valley, PA - (Marginal)
Wayne County
1-Hr Ozone (1979) Wayne Co, PA - (Incomplete Data)
Westmoreland County
8-Hr Ozone (1997) Pittsburgh-Beaver Valley, PA - (Moderate)
1-Hr Ozone (1979) Pittsburgh-Beaver Valley, PA - (Moderate)
8-Hr Ozone (2008) Pittsburgh-Beaver Valley, PA - (Marginal)
Wyoming County
8-Hr Ozone (1997) Scranton-Wilkes-Barre, PA - (Former Subpart 1)
1-Hr Ozone (1979) Scranton-Wilkes-Barre, PA - (Marginal)
York County
8-Hr Ozone (1997) York, PA - (Former Subpart 1)
1-Hr Ozone (1979) York, PA - (Marginal)
RHODE ISLAND
Bristol County
8-Hr Ozone (1997) Providence (all of RI), RI - (Moderate)
1-Hr Ozone (1979) Providence (all of RI), RI - (Serious)
Kent County
8-Hr Ozone (1997) Providence (all of RI), RI - (Moderate)
1-Hr Ozone (1979) Providence (all of RI), RI - (Serious)
Newport County
8-Hr Ozone (1997) Providence (all of RI), RI - (Moderate)
1-Hr Ozone (1979) Providence (all of RI), RI - (Serious)
Providence County
8-Hr Ozone (1997) Providence (all of RI), RI - (Moderate)
1-Hr Ozone (1979) Providence (all of RI), RI - (Serious)
Washington County
8-Hr Ozone (1997) Providence (all of RI), RI - (Moderate)
1-Hr Ozone (1979) Providence (all of RI), RI - (Serious)
SOUTH CAROLINA
Cherokee County
1-Hr Ozone (1979) Cherokee Co, SC - (Marginal)
York County
8-Hr Ozone (1997) * Charlotte-Gastonia-Rock Hill, NC-SC - (Moderate)
8-Hr Ozone (2008) * Charlotte-Rock Hill, NC-SC - (Marginal)
TENNESSEE
Anderson County
8-Hr Ozone (1997) Knoxville, TN - (Former Subpart 1)
8-Hr Ozone (2008) * Knoxville, TN - (Marginal)
Blount County
8-Hr Ozone (1997) Knoxville, TN - (Former Subpart 1)
8-Hr Ozone (2008) Knoxville, TN - (Marginal)
Cocke County
8-Hr Ozone (1997) * Knoxville, TN - (Former Subpart 1)
Davidson County
1-Hr Ozone (1979) Nashville, TN - (Moderate)
Jefferson County
8-Hr Ozone (1997) Knoxville, TN - (Former Subpart 1)
Knox County
8-Hr Ozone (1997) Knoxville, TN - (Former Subpart 1)
1-Hr Ozone (1979) Knoxville, TN - (Marginal)
8-Hr Ozone (2008) Knoxville, TN - (Marginal)
Loudon County
8-Hr Ozone (1997) Knoxville, TN - (Former Subpart 1)
Montgomery County
8-Hr Ozone (1997) Clarksville-Hopkinsville, TN-KY - (Former Subpart 1)
Rutherford County
1-Hr Ozone (1979) Nashville, TN - (Moderate)
Sevier County
8-Hr Ozone (1997) Knoxville, TN - (Former Subpart 1)
Shelby County
8-Hr Ozone (1997) Memphis, TN-AR - (Moderate)
1-Hr Ozone (1979) Memphis, TN - (Marginal)
8-Hr Ozone (2008) Memphis, TN-MS-AR - (Marginal)
Sumner County
1-Hr Ozone (1979) Nashville, TN - (Moderate)
Williamson County
1-Hr Ozone (1979) Nashville, TN - (Moderate)
Wilson County
1-Hr Ozone (1979) Nashville, TN - (Moderate)
TEXAS
Brazoria County
8-Hr Ozone (1997) Houston-Galveston-Brazoria, TX - (Severe 15)
1-Hr Ozone (1979) Houston-Galveston-Brazoria, TX - (Severe 17)
8-Hr Ozone (2008) Houston-Galveston-Brazoria, TX - (Moderate)
Chambers County
8-Hr Ozone (1997) Houston-Galveston-Brazoria, TX - (Severe 15)
1-Hr Ozone (1979) Houston-Galveston-Brazoria, TX - (Severe 17)
8-Hr Ozone (2008) Houston-Galveston-Brazoria, TX - (Moderate)
Collin County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
1-Hr Ozone (1979) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
Dallas County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
1-Hr Ozone (1979) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
Denton County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
1-Hr Ozone (1979) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
El Paso County
1-Hr Ozone (1979) El Paso, TX - (Serious)
Ellis County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
Fort Bend County
8-Hr Ozone (1997) Houston-Galveston-Brazoria, TX - (Severe 15)
1-Hr Ozone (1979) Houston-Galveston-Brazoria, TX - (Severe 17)
8-Hr Ozone (2008) Houston-Galveston-Brazoria, TX - (Moderate)
Galveston County
8-Hr Ozone (1997) Houston-Galveston-Brazoria, TX - (Severe 15)
1-Hr Ozone (1979) Houston-Galveston-Brazoria, TX - (Severe 17)
8-Hr Ozone (2008) Houston-Galveston-Brazoria, TX - (Moderate)
Hardin County
8-Hr Ozone (1997) Beaumont-Port Arthur, TX - (Moderate)
1-Hr Ozone (1979) Beaumont-Port Arthur, TX - (Serious)
Harris County
8-Hr Ozone (1997) Houston-Galveston-Brazoria, TX - (Severe 15)
1-Hr Ozone (1979) Houston-Galveston-Brazoria, TX - (Severe 17)
8-Hr Ozone (2008) Houston-Galveston-Brazoria, TX - (Moderate)
Jefferson County
8-Hr Ozone (1997) Beaumont-Port Arthur, TX - (Moderate)
1-Hr Ozone (1979) Beaumont-Port Arthur, TX - (Serious)
Johnson County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
Kaufman County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
Liberty County
8-Hr Ozone (1997) Houston-Galveston-Brazoria, TX - (Severe 15)
1-Hr Ozone (1979) Houston-Galveston-Brazoria, TX - (Severe 17)
8-Hr Ozone (2008) Houston-Galveston-Brazoria, TX - (Moderate)
Montgomery County
8-Hr Ozone (1997) Houston-Galveston-Brazoria, TX - (Severe 15)
1-Hr Ozone (1979) Houston-Galveston-Brazoria, TX - (Severe 17)
8-Hr Ozone (2008) Houston-Galveston-Brazoria, TX - (Moderate)
Orange County
8-Hr Ozone (1997) Beaumont-Port Arthur, TX - (Moderate)
1-Hr Ozone (1979) Beaumont-Port Arthur, TX - (Serious)
Parker County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
Rockwall County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
Tarrant County
8-Hr Ozone (1997) Dallas-Fort Worth, TX - (Serious)
1-Hr Ozone (1979) Dallas-Fort Worth, TX - (Serious)
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
Victoria County
1-Hr Ozone (1979) Victoria, TX - (Incomplete Data)
Waller County
8-Hr Ozone (1997) Houston-Galveston-Brazoria, TX - (Severe 15)
1-Hr Ozone (1979) Houston-Galveston-Brazoria, TX - (Severe 17)
8-Hr Ozone (2008) Houston-Galveston-Brazoria, TX - (Moderate)
Wise County
8-Hr Ozone (2008) Dallas-Fort Worth, TX - (Moderate)
UTAH
Davis County
1-Hr Ozone (1979) Salt Lake City, UT - (Moderate)
Salt Lake County
1-Hr Ozone (1979) Salt Lake City, UT - (Moderate)
VIRGINIA
Alexandria city
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Arlington County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Charles City County
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
1-Hr Ozone (1979) * Richmond, VA - (Moderate)
Chesapeake city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Chesterfield County
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
1-Hr Ozone (1979) Richmond, VA - (Moderate)
Colonial Heights city
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
1-Hr Ozone (1979) Richmond, VA - (Moderate)
Fairfax County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Fairfax city
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Falls Church city
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Fredericksburg city
8-Hr Ozone (1997) Fredericksburg, VA - (Moderate)
Gloucester County
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Hampton city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Hanover County
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
1-Hr Ozone (1979) Richmond, VA - (Moderate)
Henrico County
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
1-Hr Ozone (1979) Richmond, VA - (Moderate)
Hopewell city
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
1-Hr Ozone (1979) Richmond, VA - (Moderate)
Isle of Wight County
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
James City County
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Loudoun County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Madison County
8-Hr Ozone (1997) * Madison and Page Cos (Shenandoah NP), VA - (Former Subpart 1)
Manassas Park city
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Manassas city
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Newport News city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Norfolk city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Page County
8-Hr Ozone (1997) * Madison and Page Cos (Shenandoah NP), VA - (Former Subpart 1)
Petersburg city
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
Poquoson city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Portsmouth city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Prince George County
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
Prince William County
8-Hr Ozone (1997) Washington, DC-MD-VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
8-Hr Ozone (2008) Washington, DC-MD-VA - (Marginal)
Richmond city
8-Hr Ozone (1997) Richmond-Petersburg, VA - (Marginal)
1-Hr Ozone (1979) Richmond, VA - (Moderate)
Smyth County
1-Hr Ozone (1979) * Smyth Co, VA (White Top Mtn) - (Rural Transport (Marginal))
Spotsylvania County
8-Hr Ozone (1997) Fredericksburg, VA - (Moderate)
Stafford County
8-Hr Ozone (1997) Fredericksburg, VA - (Moderate)
1-Hr Ozone (1979) Washington, DC-MD-VA - (Severe 15)
Suffolk city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Virginia Beach city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
Williamsburg city
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
York County
8-Hr Ozone (1997) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
1-Hr Ozone (1979) Norfolk-Virginia Beach-Newport News (Hampton Roads), VA - (Marginal)
WASHINGTON
Clark County
1-Hr Ozone (1979) * Portland-Vancouver AQMA, OR-WA - (Marginal)
King County
1-Hr Ozone (1979) * Seattle-Tacoma, WA - (Marginal)
Pierce County
1-Hr Ozone (1979) Seattle-Tacoma, WA - (Marginal)
Snohomish County
1-Hr Ozone (1979) * Seattle-Tacoma, WA - (Marginal)
WEST VIRGINIA
Brooke County
8-Hr Ozone (1997) Steubenville-Weirton, OH-WV - (Former Subpart 1)
Cabell County
8-Hr Ozone (1997) Huntington-Ashland, WV-KY - (Former Subpart 1)
1-Hr Ozone (1979) Huntington-Ashland, WV-KY - (Moderate)
Greenbrier County
1-Hr Ozone (1979) Greenbrier, WV - (Marginal)
Hancock County
8-Hr Ozone (1997) Steubenville-Weirton, OH-WV - (Former Subpart 1)
Kanawha County
8-Hr Ozone (1997) Charleston, WV - (Former Subpart 1)
1-Hr Ozone (1979) Charleston, WV - (Moderate)
Marshall County
8-Hr Ozone (1997) Wheeling, WV-OH - (Former Subpart 1)
Ohio County
8-Hr Ozone (1997) Wheeling, WV-OH - (Former Subpart 1)
Putnam County
8-Hr Ozone (1997) Charleston, WV - (Former Subpart 1)
1-Hr Ozone (1979) Charleston, WV - (Moderate)
Wayne County
8-Hr Ozone (1997) Huntington-Ashland, WV-KY - (Former Subpart 1)
1-Hr Ozone (1979) Huntington-Ashland, WV-KY - (Moderate)
Wood County
8-Hr Ozone (1997) Parkersburg-Marietta, WV-OH - (Former Subpart 1)
1-Hr Ozone (1979) Parkersburg-Marietta, WV - (Moderate)
WISCONSIN
Door County
8-Hr Ozone (1997) Door Co, WI - (Former Subpart 1)
1-Hr Ozone (1979) Door Co, WI - (Rural Transport (Marginal))
Kenosha County
8-Hr Ozone (1997) Milwaukee-Racine, WI - (Moderate)
1-Hr Ozone (1979) Milwaukee-Racine, WI - (Severe 17)
8-Hr Ozone (2008) * Chicago-Naperville, IL-IN-WI - (Moderate)
Kewaunee County
8-Hr Ozone (1997) Kewaunee Co, WI - (Former Subpart 1)
1-Hr Ozone (1979) Kewaunee Co, WI - (Moderate)
Manitowoc County
8-Hr Ozone (1997) Manitowoc Co, WI - (Former Subpart 1)
1-Hr Ozone (1979) Manitowoc Co, WI - (Moderate)
Milwaukee County
8-Hr Ozone (1997) Milwaukee-Racine, WI - (Moderate)
1-Hr Ozone (1979) Milwaukee-Racine, WI - (Severe 17)
Ozaukee County
8-Hr Ozone (1997) Milwaukee-Racine, WI - (Moderate)
1-Hr Ozone (1979) Milwaukee-Racine, WI - (Severe 17)
Racine County
8-Hr Ozone (1997) Milwaukee-Racine, WI - (Moderate)
1-Hr Ozone (1979) Milwaukee-Racine, WI - (Severe 17)
Sheboygan County
8-Hr Ozone (1997) Sheboygan, WI - (Moderate)
1-Hr Ozone (1979) Sheboygan, WI - (Moderate)
8-Hr Ozone (2008) Sheboygan County, WI - (Moderate)
Walworth County
1-Hr Ozone (1979) Walworth Co, WI - (Marginal)
Washington County
8-Hr Ozone (1997) Milwaukee-Racine, WI - (Moderate)
1-Hr Ozone (1979) Milwaukee-Racine, WI - (Severe 17)
Waukesha County
8-Hr Ozone (1997) Milwaukee-Racine, WI - (Moderate)
1-Hr Ozone (1979) Milwaukee-Racine, WI - (Severe 17)
WYOMING
Lincoln County
8-Hr Ozone (2008) * Upper Green River Basin Area, WY - (Marginal)
Sublette County
8-Hr Ozone (2008) Upper Green River Basin Area, WY - (Marginal)
Sweetwater County
8-Hr Ozone (2008) * Upper Green River Basin Area, WY - (Marginal)


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