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PM-10 (1987) Designated Area Area/State/County Report
PM-10 (1987) Designated Area Area/State/County Report
Data is current as of November 30, 2025| Ada County; Boise, ID (Moderate - Maintenance) | |
| IDAHO (Region X) | |
| Ada County (P) | |
| Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO (Moderate - Maintenance) | |
| COLORADO (Region VIII) | |
| Adams County (P) | |
| Arapahoe County (P) | |
| Boulder County (P) | |
| Broomfield County | |
| Denver County | |
| Douglas County | |
| Jefferson County | |
| Allegheny County; Liberty, Lincoln, Port Vue, Glassport, Clairton, PA (Moderate - Maintenance) | |
| PENNSYLVANIA (Region III) | |
| Allegheny County (P) | |
| Anchorage; Eagle River, AK (Moderate - Maintenance) | |
| ALASKA (Region X) | |
| Anchorage Municipality (P) | |
| Community of Eagle River | |
| Archuleta County; Pagosa Springs, CO (Moderate - Maintenance) | |
| COLORADO (Region VIII) | |
| Archuleta County (P) | |
| Aroostock County; City of Presque Isle, ME (Moderate - Maintenance) | |
| MAINE (Region I) | |
| Aroostook County (P) | |
| City of Presque Isle | |
| Bonner County; The Sandpoint Area, ID (Moderate - Maintenance) | |
| IDAHO (Region X) | |
| Bonner County (P) | |
| Brooke; Follansbee area, WV (Moderate - Maintenance) | |
| WEST VIRGINIA (Region III) | |
| Brooke County (P) | |
| Clark County; Las Vegas planning area, NV (Serious - Maintenance) | |
| NEVADA (Region IX) | |
| Clark County (P) | |
| Las Vegas planning area Hydrographic Area 212 | |
| Cochise County; Paul Spur/Douglas planning area, AZ (Moderate - Nonattainment) | |
| ARIZONA (Region IX) | |
| Cochise County (P) | |
| Cook County; Lyons Township, IL (Moderate - Maintenance) | |
| ILLINOIS (Region V) | |
| Cook County (P) | |
| Lyons Township | |
| Cook County; Southeast Chicago, IL (Moderate - Maintenance) | |
| ILLINOIS (Region V) | |
| Cook County (P) | |
| Coso Junction, CA (Moderate - Maintenance) | |
| CALIFORNIA (Region IX) | |
| Inyo County (P) | |
| Searles Valley planning area Hydrologic Unit #18090205 | |
| Cuyahoga County, OH (Moderate - Maintenance) | |
| OHIO (Region V) | |
| Cuyahoga County | |
| Dona Ana County; Anthony, NM (Moderate - Nonattainment) | |
| NEW MEXICO (Region VI) | |
| Dona Ana County (P) | |
| East Kern County, CA (Serious - Nonattainment) | |
| CALIFORNIA (Region IX) | |
| Kern County (P) | |
| El Paso County, TX (Moderate - Nonattainment) | |
| TEXAS (Region VI) | |
| El Paso County (P) | |
| City of El Paso | |
| Flathead County; Columbia Falls and vicinity, MT (Moderate - Maintenance) | |
| MONTANA (Region VIII) | |
| Flathead County (P) | |
| Flathead County; Kalispell and vicinity, MT (Moderate - Maintenance) | |
| MONTANA (Region VIII) | |
| Flathead County (P) | |
| Flathead County; Whitefish and vicinity, MT (Moderate - Maintenance) | |
| MONTANA (Region VIII) | |
| Flathead County (P) | |
| Fremont County; Canon City Area, CO (Moderate - Maintenance) | |
| COLORADO (Region VIII) | |
| Fremont County (P) | |
| Gila County (part): Payson, AZ (Moderate - Maintenance) | |
| ARIZONA (Region IX) | |
| Gila County (P) | |
| Hancock and Brooke Counties (Part); The city of Weirton, WV (Moderate - Maintenance) | |
| WEST VIRGINIA (Region III) | |
| Brooke County (P) | |
| The city of Weirton | |
| Hancock County (P) | |
| The city of Weirton | |
| Hayden, AZ (Moderate - Nonattainment) | |
| ARIZONA (Region IX) | |
| Gila County (P) | |
| Pinal County (P) | |
| Imperial Valley, CA (Serious - Maintenance) | |
| CALIFORNIA (Region IX) | |
| Imperial County (P) | |
| Imperial Valley planning area | |
| Indian Wells, CA (Moderate - Maintenance) | |
| CALIFORNIA (Region IX) | |
| Kern County (P) | |
| Searles Valley planning area Hydrologic Unit #18090205 | |
| Inyo County; Owens Valley planning area, CA (Serious - Nonattainment) | |
| CALIFORNIA (Region IX) | |
| Inyo County (P) | |
| Owens Valley planning area Hydrologic Unit #18090103 | |
| Jackson County; Medford-Ashland (including White City), OR (Moderate - Maintenance) | |
| OREGON (Region X) | |
| Jackson County (P) | |
| Jefferson County, OH (Moderate - Maintenance) | |
| OHIO (Region V) | |
| Jefferson County (P) | |
| Mingo Junction | |
| Josephine County; Grants Pass, OR (Moderate - Maintenance) | |
| OREGON (Region X) | |
| Josephine County (P) | |
| Urban Growth Boundary | |
| Juneau; Mendenhall Valley area, AK (Moderate - Maintenance) | |
| ALASKA (Region X) | |
| Juneau City and Borough (P) | |
| City of Juneau: Mendenhall Valley area | |
| King County; Kent, WA (Moderate - Maintenance) | |
| WASHINGTON (Region X) | |
| King County (P) | |
| King County; Seattle, WA (Moderate - Maintenance) | |
| WASHINGTON (Region X) | |
| King County (P) | |
| Seattle | |
| Klamath Falls, OR (Moderate - Maintenance) | |
| OREGON (Region X) | |
| Klamath County (P) | |
| Urban Growth Boundary | |
| LaSalle County; Oglesby, IL (Moderate - Maintenance) | |
| ILLINOIS (Region V) | |
| LaSalle County (P) | |
| Lake County (part); Lakeview, OR (Moderate - Maintenance) | |
| OREGON (Region X) | |
| Lake County (P) | |
| Lakeview (Urban Growth Boundary). | |
| Lake County; Cities of East Chicago, Hammond, Whiting, and Gary, IN (Moderate - Maintenance) | |
| INDIANA (Region V) | |
| Lake County (P) | |
| Cities of East Chicago, Hammond, Whiting, and Gary | |
| Lake County; Polson, MT (Moderate - Nonattainment) | |
| MONTANA (Region VIII) | |
| Lake County (P) | |
| Polson | |
| Lake County; Ronan, MT (Moderate - Nonattainment) | |
| MONTANA (Region VIII) | |
| Lake County (P) | |
| Ronan | |
| Lane County (part); Oakridge, OR (Moderate - Maintenance) | |
| OREGON (Region X) | |
| Lane County (P) | |
| Oakridge (Urban Growth Boundary) | |
| Lane County; Eugene/Springfield, OR (Moderate - Maintenance) | |
| OREGON (Region X) | |
| Lane County (P) | |
| Urban Growth Boundary | |
| Lincoln County; Libby and vicinity, MT (Moderate - Maintenance) | |
| MONTANA (Region VIII) | |
| Lincoln County (P) | |
| Madison County; Granite City Township and Nameoki Township, IL (Moderate - Maintenance) | |
| ILLINOIS (Region V) | |
| Madison County (P) | |
| Maricopa and Pinal Counties; Phoenix planning area, AZ (Serious - Nonattainment) | |
| ARIZONA (Region IX) | |
| Maricopa County (P) | |
| Pinal County (P) | |
| Miami, AZ (Moderate - Nonattainment) | |
| ARIZONA (Region IX) | |
| Gila County (P) | |
| Pinal County (P) | |
| Missoula, MT (Moderate - Maintenance) | |
| MONTANA (Region VIII) | |
| Missoula County (P) | |
| Mohave County (part); Bullhead City, AZ (Moderate - Maintenance) | |
| ARIZONA (Region IX) | |
| Mohave County (P) | |
| Bullhead City | |
| Mono Basin, CA (Moderate - Nonattainment) | |
| CALIFORNIA (Region IX) | |
| Mono County (P) | |
| Hydrologic Unit 1809010 | |
| Mono County; Mammoth Lake planning area, CA (Moderate - Maintenance) | |
| CALIFORNIA (Region IX) | |
| Mono County (P) | |
| Mun. of Guaynabo, PR (Moderate - Maintenance) | |
| PUERTO RICO (Region II) | |
| Guaynabo Municipio (P) | |
| New York County, NY (Moderate - Nonattainment) | |
| NEW YORK (Region II) | |
| New York County | |
| Ogden, UT (Moderate - Maintenance) | |
| UTAH (Region VIII) | |
| Weber County (P) | |
| City of Ogden | |
| Olmsted County, MN (Moderate - Maintenance) | |
| MINNESOTA (Region V) | |
| Olmsted County (P) | |
| Pierce County; Tacoma, WA (Moderate - Maintenance) | |
| WASHINGTON (Region X) | |
| Pierce County (P) | |
| Tacoma | |
| Pima County; Ajo planning area, AZ (Moderate - Maintenance) | |
| ARIZONA (Region IX) | |
| Pima County (P) | |
| Pima County; Rillito planning area, AZ (Moderate - Nonattainment) | |
| ARIZONA (Region IX) | |
| Pima County (P) | |
| Pinal County (part); West Pinal, AZ (Serious - Nonattainment) | |
| ARIZONA (Region IX) | |
| Pinal County (P) | |
| Pitkin County; Aspen, CO (Moderate - Maintenance) | |
| COLORADO (Region VIII) | |
| Pitkin County (P) | |
| Power-Bannock Counties; Fort Hall Indian Reservation, ID (Moderate - Nonattainment) | |
| IDAHO (Region X) | |
| Bannock County (P) | |
| Power County (P) | |
| Power-Bannock Counties; Portneuf Valley Area, ID (Moderate - Maintenance) | |
| IDAHO (Region X) | |
| Bannock County (P) | |
| Power County (P) | |
| Prowers County; Lamar, CO (Moderate - Maintenance) | |
| COLORADO (Region VIII) | |
| Prowers County (P) | |
| Ramsey County, MN (Moderate - Maintenance) | |
| MINNESOTA (Region V) | |
| Ramsey County (P) | |
| St. Paul | |
| Riverside County; Coachella Valley planning area, CA (Serious - Nonattainment) | |
| CALIFORNIA (Region IX) | |
| Riverside County (P) | |
| Coachella Valley planning area | |
| Riverside, Los Angeles, Orange, & San Bernardino Counties; South Coast Air Basin, CA (Serious - Maintenance) | |
| CALIFORNIA (Region IX) | |
| Los Angeles County (P) | |
| South Coast Air Basin | |
| Orange County | |
| Riverside County (P) | |
| South Coast Air Basin | |
| San Bernardino County (P) | |
| South Coast Air Basin | |
| Rosebud County; Lame Deer, MT (Moderate - Nonattainment) | |
| MONTANA (Region VIII) | |
| Rosebud County (P) | |
| Routt County (part); Steamboat Springs, CO (Moderate - Maintenance) | |
| COLORADO (Region VIII) | |
| Routt County (P) | |
| Steamboat Springs | |
| Sacramento County, CA (Moderate - Maintenance) | |
| CALIFORNIA (Region IX) | |
| Sacramento County | |
| Salt Lake County, UT (Moderate - Maintenance) | |
| UTAH (Region VIII) | |
| Salt Lake County | |
| San Bernardino County, CA (Moderate - Nonattainment) | |
| CALIFORNIA (Region IX) | |
| San Bernardino County (P) | |
| San Joaquin Valley Air Basin, CA (Serious - Maintenance) | |
| CALIFORNIA (Region IX) | |
| Fresno County | |
| Kern County (P) | |
| Kings County | |
| Madera County | |
| Merced County | |
| San Joaquin County | |
| Stanislaus County | |
| Tulare County | |
| San Miguel County; Telluride, CO (Moderate - Maintenance) | |
| COLORADO (Region VIII) | |
| San Miguel County (P) | |
| Sanders County (part); Thompson Falls and vicinity, MT (Moderate - Maintenance) | |
| MONTANA (Region VIII) | |
| Sanders County (P) | |
| Santa Cruz County; Nogales planning area, AZ (Moderate - Nonattainment) | |
| ARIZONA (Region IX) | |
| Santa Cruz County (P) | |
| Sheridan County; City of Sheridan, WY (Moderate - Maintenance) | |
| WYOMING (Region VIII) | |
| Sheridan County (P) | |
| City of Sheridan | |
| Shoshone County; City of Pinehurst, ID (Moderate - Maintenance) | |
| IDAHO (Region X) | |
| Shoshone County (P) | |
| City of Pinehurst | |
| Shoshone County; Pinehurst Expansion Area, ID (Moderate - Maintenance) | |
| IDAHO (Region X) | |
| Shoshone County (P) | |
| excluding Pinehurst | |
| Silver Bow County; Butte, MT (Moderate - Maintenance) | |
| MONTANA (Region VIII) | |
| Silver Bow County (P) | |
| Spokane County, WA (Moderate - Maintenance) | |
| WASHINGTON (Region X) | |
| Spokane County (P) | |
| Thurston County; Cities of Olympia, Tumwater, and Lacey, WA (Moderate - Maintenance) | |
| WASHINGTON (Region X) | |
| Thurston County (P) | |
| Cities of Olympia, Tumwater, and Lacey | |
| Trona, CA (Moderate - Nonattainment) | |
| CALIFORNIA (Region IX) | |
| San Bernardino County (P) | |
| Searles Valley planning area Hydrologic Unit #18090205 | |
| Union County; LaGrande, OR (Moderate - Maintenance) | |
| OREGON (Region X) | |
| Union County (P) | |
| Urban Growth Boundary | |
| Utah County, UT (Moderate - Maintenance) | |
| UTAH (Region VIII) | |
| Utah County | |
| Vermillion County; Part of Clinton Township, IN (Moderate - Maintenance) | |
| INDIANA (Region V) | |
| Vermillion County (P) | |
| Walla Walla County; Wallula, WA (Serious - Maintenance) | |
| WASHINGTON (Region X) | |
| Walla Walla County (P) | |
| Wallula | |
| Washoe County; Reno planning area, NV (Serious - Maintenance) | |
| NEVADA (Region IX) | |
| Washoe County (P) | |
| Reno planning area Hydrographic area 87 | |
| Wayne County, MI (Moderate - Maintenance) | |
| MICHIGAN (Region V) | |
| Wayne County (P) | |
| Detroit | |
| Yakima County, WA (Moderate - Maintenance) | |
| WASHINGTON (Region X) | |
| Yakima County (P) | |
| Yuma, AZ (Moderate - Nonattainment) | |
| ARIZONA (Region IX) | |
| Yuma County (P) | |
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