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Carbon Monoxide (1971) Maintenance Area (Redesignated from Nonattainment) State/Area/County Report

Data is current as of October 31, 2024


ALASKA (Region X)
  Anchorage, AK (Serious - Maintenance)
Anchorage Municipality (P)
Portion of Anchorage urban area
 
  Fairbanks, AK (Serious - Maintenance)
Fairbanks North Star Borough (P)
Portion of Fairbanks urban area
 
ARIZONA (Region IX)
  Phoenix, AZ (Serious - Maintenance)
Maricopa County (P)
 
  Tucson, AZ (Not Classified - Maintenance)
Pima County (P)
Portion of Tucson urban area
 
CALIFORNIA (Region IX)
  Bakersfield, CA (Not Classified - Maintenance)
Kern County (P)
 
  Chico, CA (Moderate <= 12.7ppm - Maintenance)
Butte County (P)
 
  Fresno, CA (Moderate > 12.7ppm - Maintenance)
Fresno County (P)
Fresno Urbanized Area (11/20/85, 50 FR 47735)
 
  Lake Tahoe North Shore, CA (Not Classified - Maintenance)
Placer County (P)
 
  Lake Tahoe South Shore, CA (Moderate <= 12.7ppm - Maintenance)
El Dorado County (P)
 
  Los Angeles-South Coast Air Basin, CA (Serious - Maintenance)
Los Angeles County (P)
Orange County
Riverside County (P)
San Bernardino County (P)
 
  Modesto, CA (Moderate <= 12.7ppm - Maintenance)
Stanislaus County (P)
 
  Sacramento, CA (Moderate <= 12.7ppm - Maintenance)
Placer County (P)
Sacramento County (P)
Yolo County (P)
 
  San Diego, CA (Moderate <= 12.7ppm - Maintenance)
San Diego County (P)
 
  San Francisco-Oakland-San Jose, CA (Moderate <= 12.7ppm - Maintenance)
Alameda County (P)
Contra Costa County (P)
Marin County (P)
Napa County (P)
San Francisco County
San Mateo County (P)
Santa Clara County (P)
Solano County (P)
Sonoma County (P)
 
  Stockton, CA (Moderate <= 12.7ppm - Maintenance)
San Joaquin County (P)
 
COLORADO (Region VIII)
  Colorado Springs, CO (Moderate <= 12.7ppm - Maintenance)
El Paso County (P)
Teller County (P)
 
  Denver-Boulder, CO (Serious - Maintenance)
Adams County (P)
Denver Metro Area
Arapahoe County (P)
Denver Metro Area
Boulder County (P)
Denver Metro Area
Broomfield County
Denver County
Douglas County (P)
Denver Metro Area
Jefferson County (P)
Denver Metro Area
 
  Fort Collins, CO (Moderate <= 12.7ppm - Maintenance)
Larimer County (P)
 
  Greeley, CO (Not Classified - Maintenance)
Weld County (P)
 
  Longmont, CO (Moderate <= 12.7ppm - Maintenance)
Boulder County (P)
Portion of Longmont
Weld County (P)
Portion of Longmont
 
CONNECTICUT (Region I)
  Hartford-New Britain-Middletown, CT (Moderate <= 12.7ppm - Maintenance)
Hartford County (P)
Litchfield County (P)
Plymouth Town
Middlesex County (P)
Tolland County (P)
 
  New Haven-Meriden-Waterbury, CT (Not Classified - Maintenance)
Fairfield County (P)
Shelton City
Litchfield County (P)
Bethlehem Town, Thomaston Town, Watertown, Woodbury Town.
New Haven County
 
  New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate > 12.7ppm - Maintenance)
Fairfield County (P)
All cities and townships except Shelton city
Litchfield County (P)
Bridgewater town, New Milford town
 
DISTRICT OF COLUMBIA (Region III)
  Washington, DC-MD-VA (Moderate <= 12.7ppm - Maintenance)
District of Columbia
 
IDAHO (Region X)
  Boise-Northern Ada County, ID (Not Classified - Maintenance)
Ada County (P)
Northern half of Ada Co
 
INDIANA (Region V)
  East Chicago, IN (Not Classified - Maintenance)
Lake County (P)
 
  Indianapolis, IN (Not Classified - Maintenance)
Marion County (P)
 
MARYLAND (Region III)
  Baltimore, MD (Moderate <= 12.7ppm - Maintenance)
Baltimore city (P)
 
  Washington, DC-MD-VA (Moderate <= 12.7ppm - Maintenance)
Montgomery County (P)
Election Districts 4, 7, 13
Prince George's County (P)
Election Districts 2, 6, 12, 16, 17, 18
 
MASSACHUSETTS (Region I)
  Boston, MA (Moderate <= 12.7ppm - Maintenance)
Middlesex County (P)
Cities of: Cambridge, Everett, Malden, Medford, and Somerville.
Norfolk County (P)
Quincy CIty
Suffolk County (P)
Cities of: Boston, Chelsea, and Revere
 
  Lowell, MA (Not Classified - Maintenance)
Middlesex County (P)
Lowell City
 
  Springfield, MA (Not Classified - Maintenance)
Hampden County (P)
Springfield City
 
  Waltham, MA (Not Classified - Maintenance)
Middlesex County (P)
Waltham City
 
  Worcester, MA (Not Classified - Maintenance)
Worcester County (P)
City of Worcester
 
MICHIGAN (Region V)
  Detroit, MI (Not Classified - Maintenance)
Macomb County (P)
A portion of Detroit
Oakland County (P)
A portion of Detroit
Wayne County (P)
A portion of Detroit
 
MINNESOTA (Region V)
  Duluth, MN (Moderate <= 12.7ppm - Maintenance)
St. Louis County (P)
City of Duluth
 
  Minneapolis-St. Paul, MN (Moderate <= 12.7ppm - Maintenance)
Anoka County
Carver County (P)
Dakota County (P)
Hennepin County
Ramsey County
Scott County (P)
Washington County (P)
All cities and townships except Denmark Township.
Wright County (P)
 
MISSOURI (Region VII)
  St. Louis, MO (Not Classified - Maintenance)
St. Louis County (P)
The area encompassed by the I-270 and the Mississippi River.
St. Louis city
 
MONTANA (Region VIII)
  Billings, MT (Not Classified - Maintenance)
Yellowstone County (P)
Certain ranges and townships
 
  Great Falls, MT (Not Classified - Maintenance)
Cascade County (P)
 
  Missoula, MT (Moderate <= 12.7ppm - Maintenance)
Missoula County (P)
 
NEVADA (Region IX)
  Lake Tahoe, NV (Not Classified - Maintenance)
Carson City (P)
Hydrographic Area 90
Douglas County (P)
Hydrographic Area 90
Washoe County (P)
Hydrographic Area 90
 
  Las Vegas, NV (Serious - Maintenance)
Clark County (P)
Las Vegas Valley Hydrographic Area 212
 
  Reno, NV (Moderate <= 12.7ppm - Maintenance)
Washoe County (P)
Truckee Meadows Hydrographic Area 87
 
NEW HAMPSHIRE (Region I)
  Manchester, NH (Not Classified - Maintenance)
Hillsborough County (P)
City of Manchester
 
  Nashua, NH (Not Classified - Maintenance)
Hillsborough County (P)
City of Nashua
 
NEW JERSEY (Region II)
  Atlantic City, NJ (Not Classified - Maintenance)
Atlantic County (P)
The City of Atlantic City
 
  Burlington, NJ (Not Classified - Maintenance)
Burlington County (P)
City of Burlington
 
  Freehold, NJ (Not Classified - Maintenance)
Monmouth County (P)
Borough of Freehold
 
  Morristown, NJ (Not Classified - Maintenance)
Morris County (P)
City of Morristown
 
  New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate > 12.7ppm - Maintenance)
Bergen County
Essex County
Hudson County
Passaic County (P)
City of Clifton, City of Patterson, City of Passaic
Union County
 
  Penns Grove, NJ (Not Classified - Maintenance)
Salem County (P)
 
  Perth Amboy, NJ (Not Classified - Maintenance)
Middlesex County (P)
City of Perth Amboy
 
  Philadelphia-Camden County, PA-NJ (Moderate <= 12.7ppm - Maintenance)
Camden County
 
  Somerville, NJ (Not Classified - Maintenance)
Somerset County (P)
Borough of Somerville
 
  Toms River, NJ (Not Classified - Maintenance)
Ocean County (P)
City of Toms River
 
  Trenton, NJ (Not Classified - Maintenance)
Mercer County (P)
City of Trenton
 
NEW MEXICO (Region VI)
  Albuquerque, NM (Moderate <= 12.7ppm - Maintenance)
Bernalillo County
 
NEW YORK (Region II)
  New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate > 12.7ppm - Maintenance)
Bronx County
Kings County
Nassau County
New York County
Queens County
Richmond County
Westchester County
 
  Syracuse, NY (Moderate <= 12.7ppm - Maintenance)
Onondaga County
 
NORTH CAROLINA (Region IV)
  Charlotte, NC (Not Classified - Maintenance)
Mecklenburg County
 
  Raleigh-Durham, NC (Moderate <= 12.7ppm - Maintenance)
Durham County
Wake County
 
  Winston-Salem, NC (Moderate <= 12.7ppm - Maintenance)
Forsyth County
 
OHIO (Region V)
  Cleveland, OH (Moderate <= 12.7ppm - Maintenance)
Cuyahoga County
 
OREGON (Region X)
  Eugene-Springfield, OR (Not Classified - Maintenance)
Lane County (P)
Air Quality Maintenance Area
 
  Grants Pass, OR (Moderate <= 12.7ppm - Maintenance)
Josephine County (P)
Central Business District
 
  Klamath Falls, OR (Moderate <= 12.7ppm - Maintenance)
Klamath County (P)
Urban Growth Boundary
 
  Medford, OR (Moderate <= 12.7ppm - Maintenance)
Jackson County (P)
Medford-Ashland Urban Growth Boundary
 
  Portland, OR (Moderate <= 12.7ppm - Maintenance)
Clackamas County (P)
Portland Metro Service District Boundary
Multnomah County (P)
Portland Metro Service District Boundary
Washington County (P)
Portland Metro Service District Boundary
 
  Salem, OR (Not Classified - Maintenance)
Marion County (P)
City of Salem
Polk County (P)
City of Salem
 
PENNSYLVANIA (Region III)
  Philadelphia-Camden County, PA-NJ (Moderate <= 12.7ppm - Maintenance)
Philadelphia County (P)
 
  Pittsburgh, PA (Not Classified - Maintenance)
Allegheny County (P)
 
TENNESSEE (Region IV)
  Memphis, TN (Moderate <= 12.7ppm - Maintenance)
Shelby County
 
TEXAS (Region VI)
  El Paso, TX (Moderate <= 12.7ppm - Maintenance)
El Paso County (P)
Portion of the City Limits of El Paso
 
UTAH (Region VIII)
  Ogden, UT (Moderate <= 12.7ppm - Maintenance)
Weber County (P)
City of Ogden
 
  Provo, UT (Moderate > 12.7ppm - Maintenance)
Utah County (P)
City of Provo
 
  Salt Lake City, UT (Not Classified - Maintenance)
Salt Lake County (P)
Salt Lake City
 
VIRGINIA (Region III)
  Washington, DC-MD-VA (Moderate <= 12.7ppm - Maintenance)
Alexandria city
Arlington County
 
WASHINGTON (Region X)
  Seattle-Tacoma, WA (Moderate > 12.7ppm - Maintenance)
King County (P)
Pierce County (P)
Snohomish County (P)
 
  Spokane, WA (Serious - Maintenance)
Spokane County (P)
 
  Vancouver, WA (Moderate <= 12.7ppm - Maintenance)
Clark County (P)
 
  Yakima, WA (Not Classified - Maintenance)
Yakima County (P)
Portion of the Central Business District


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