PM-10 (1987) Maintenance Area (Redesignated from Nonattainment) State/Area/County Report

Data is current as of September 30, 2024

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ALASKA (Region X)

Anchorage; Eagle River, AK (Moderate - Maintenance)

Anchorage Municipality (P)

Community of Eagle River

Juneau; Mendenhall Valley area, AK (Moderate - Maintenance)

Juneau City and Borough (P)

City of Juneau: Mendenhall Valley area

ARIZONA (Region IX)

Gila County (part): Payson, AZ (Moderate - Maintenance)

Gila County (P)

Mohave County (part); Bullhead City, AZ (Moderate - Maintenance)

Mohave County (P)

Bullhead City

Pima County; Ajo planning area, AZ (Moderate - Maintenance)

Pima County (P)

CALIFORNIA (Region IX)

Coso Junction, CA (Moderate - Maintenance)

Inyo County (P)

Searles Valley planning area Hydrologic Unit #18090205

Imperial Valley, CA (Serious - Maintenance)

Imperial County (P)

Imperial Valley planning area

Indian Wells, CA (Moderate - Maintenance)

Kern County (P)

Searles Valley planning area Hydrologic Unit #18090205

Mono County; Mammoth Lake planning area, CA (Moderate - Maintenance)

Mono County (P)

Riverside, Los Angeles, Orange, & San Bernardino Counties; South Coast Air Basin, CA (Serious - Maintenance)

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

Sacramento County, CA (Moderate - Maintenance)

Sacramento County

San Joaquin Valley Air Basin, CA (Serious - Maintenance)

Fresno County

Kern County (P)

Kings County

Madera County

Merced County

San Joaquin County

Stanislaus County

Tulare County

COLORADO (Region VIII)

Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO (Moderate - Maintenance)

Adams County (P)

Arapahoe County (P)

Boulder County (P)

Broomfield County

Denver County

Douglas County

Jefferson County

Archuleta County; Pagosa Springs, CO (Moderate - Maintenance)

Archuleta County (P)

Fremont County; Canon City Area, CO (Moderate - Maintenance)

Fremont County (P)

Pitkin County; Aspen, CO (Moderate - Maintenance)

Pitkin County (P)

Prowers County; Lamar, CO (Moderate - Maintenance)

Prowers County (P)

Routt County (part); Steamboat Springs, CO (Moderate - Maintenance)

Routt County (P)

Steamboat Springs

San Miguel County; Telluride, CO (Moderate - Maintenance)

San Miguel County (P)

IDAHO (Region X)

Ada County; Boise, ID (Moderate - Maintenance)

Ada County (P)

Bonner County; The Sandpoint Area, ID (Moderate - Maintenance)

Bonner County (P)

Power-Bannock Counties; Portneuf Valley Area, ID (Moderate - Maintenance)

Bannock County (P)

Power County (P)

Shoshone County; City of Pinehurst, ID (Moderate - Maintenance)

Shoshone County (P)

City of Pinehurst

Shoshone County; Pinehurst Expansion Area, ID (Moderate - Maintenance)

Shoshone County (P)

excluding Pinehurst

ILLINOIS (Region V)

Cook County; Lyons Township, IL (Moderate - Maintenance)

Cook County (P)

Lyons Township

Cook County; Southeast Chicago, IL (Moderate - Maintenance)

Cook County (P)

LaSalle County; Oglesby, IL (Moderate - Maintenance)

LaSalle County (P)

Madison County; Granite City Township and Nameoki Township, IL (Moderate - Maintenance)

Madison County (P)

INDIANA (Region V)

Lake County; Cities of East Chicago, Hammond, Whiting, and Gary, IN (Moderate - Maintenance)

Lake County (P)

Cities of East Chicago, Hammond, Whiting, and Gary

Vermillion County; Part of Clinton Township, IN (Moderate - Maintenance)

Vermillion County (P)

MAINE (Region I)

Aroostock County; City of Presque Isle, ME (Moderate - Maintenance)

Aroostook County (P)

City of Presque Isle

MICHIGAN (Region V)

Wayne County, MI (Moderate - Maintenance)

Wayne County (P)

Detroit

MINNESOTA (Region V)

Olmsted County, MN (Moderate - Maintenance)

Olmsted County (P)

Ramsey County, MN (Moderate - Maintenance)

Ramsey County (P)

St. Paul

MONTANA (Region VIII)

Flathead County; Columbia Falls and vicinity, MT (Moderate - Maintenance)

Flathead County (P)

Flathead County; Kalispell and vicinity, MT (Moderate - Maintenance)

Flathead County (P)

Flathead County; Whitefish and vicinity, MT (Moderate - Maintenance)

Flathead County (P)

Lincoln County; Libby and vicinity, MT (Moderate - Maintenance)

Lincoln County (P)

Missoula, MT (Moderate - Maintenance)

Missoula County (P)

Sanders County (part); Thompson Falls and vicinity, MT (Moderate - Maintenance)

Sanders County (P)

Silver Bow County; Butte, MT (Moderate - Maintenance)

Silver Bow County (P)

NEVADA (Region IX)

Clark County; Las Vegas planning area, NV (Serious - Maintenance)

Clark County (P)

Las Vegas planning area Hydrographic Area 212

Washoe County; Reno planning area, NV (Serious - Maintenance)

Washoe County (P)

Reno planning area Hydrographic area 87

OHIO (Region V)

Cuyahoga County, OH (Moderate - Maintenance)

Cuyahoga County

Jefferson County, OH (Moderate - Maintenance)

Jefferson County (P)

Mingo Junction

OREGON (Region X)

Jackson County; Medford-Ashland (including White City), OR (Moderate - Maintenance)

Jackson County (P)

Josephine County; Grants Pass, OR (Moderate - Maintenance)

Josephine County (P)

Urban Growth Boundary

Klamath Falls, OR (Moderate - Maintenance)

Klamath County (P)

Urban Growth Boundary

Lake County (part); Lakeview, OR (Moderate - Maintenance)

Lake County (P)

Lakeview (Urban Growth Boundary).

Lane County (part); Oakridge, OR (Moderate - Maintenance)

Lane County (P)

Oakridge (Urban Growth Boundary)

Lane County; Eugene/Springfield, OR (Moderate - Maintenance)

Lane County (P)

Urban Growth Boundary

Union County; LaGrande, OR (Moderate - Maintenance)

Union County (P)

Urban Growth Boundary

PENNSYLVANIA (Region III)

Allegheny County; Liberty, Lincoln, Port Vue, Glassport, Clairton, PA (Moderate - Maintenance)

Allegheny County (P)

PUERTO RICO (Region II)

Mun. of Guaynabo, PR (Moderate - Maintenance)

Guaynabo Municipio (P)

UTAH (Region VIII)

Ogden, UT (Moderate - Maintenance)

Weber County (P)

City of Ogden

Salt Lake County, UT (Moderate - Maintenance)

Salt Lake County

Utah County, UT (Moderate - Maintenance)

Utah County

WASHINGTON (Region X)

King County; Kent, WA (Moderate - Maintenance)

King County (P)

King County; Seattle, WA (Moderate - Maintenance)

King County (P)

Seattle

Pierce County; Tacoma, WA (Moderate - Maintenance)

Pierce County (P)

Tacoma

Spokane County, WA (Moderate - Maintenance)

Spokane County (P)

Thurston County; Cities of Olympia, Tumwater, and Lacey, WA (Moderate - Maintenance)

Thurston County (P)

Cities of Olympia, Tumwater, and Lacey

Walla Walla County; Wallula, WA (Serious - Maintenance)

Walla Walla County (P)

Wallula

Yakima County, WA (Moderate - Maintenance)

Yakima County (P)

WEST VIRGINIA (Region III)

Brooke; Follansbee area, WV (Moderate - Maintenance)

Brooke County (P)

Hancock and Brooke Counties (Part); The city of Weirton, WV (Moderate - Maintenance)

Brooke County (P)

The city of Weirton

Hancock County (P)

The city of Weirton

WYOMING (Region VIII)

Sheridan County; City of Sheridan, WY (Moderate - Maintenance)

Sheridan County (P)

City of Sheridan

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