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

Data is current as of May 31, 2025

Click underlined column heading to change report order

State	County	Area Name	County NA Whole/Part	2010 Population	State/ County FIPS
			click link for partial county description	whole or partial county population
ALASKA	Anchorage Municipality	Anchorage; Eagle River, AK	Part	219,193	02/020
ALASKA	Juneau City and Borough	Juneau; Mendenhall Valley area, AK	Part	14,030	02/110
ARIZONA	Gila County	Gila County (part): Payson, AZ	Part	5,333	04/007
ARIZONA	Mohave County	Mohave County (part); Bullhead City, AZ	Part	10,710	04/015
ARIZONA	Pima County	Pima County; Ajo planning area, AZ	Part	8,823	04/019
CALIFORNIA	Fresno County	San Joaquin Valley Air Basin, CA	Whole	930,450	06/019
CALIFORNIA	Imperial County	Imperial Valley, CA	Part	146,905	06/025
CALIFORNIA	Inyo County	Coso Junction, CA	Part	7,333	06/027
CALIFORNIA	Kern County	Indian Wells, CA	Part	15,449	06/029
CALIFORNIA	Kern County	San Joaquin Valley Air Basin, CA	Part	698,229	06/029
CALIFORNIA	Kings County	San Joaquin Valley Air Basin, CA	Whole	152,982	06/031
CALIFORNIA	Los Angeles County	Riverside, Los Angeles, Orange, & San Bernardino Counties; South Coast Air Basin, CA	Part	9,512,219	06/037
CALIFORNIA	Madera County	San Joaquin Valley Air Basin, CA	Whole	150,865	06/039
CALIFORNIA	Merced County	San Joaquin Valley Air Basin, CA	Whole	255,793	06/047
CALIFORNIA	Mono County	Mono County; Mammoth Lake planning area, CA	Part	7,133	06/051
CALIFORNIA	Orange County	Riverside, Los Angeles, Orange, & San Bernardino Counties; South Coast Air Basin, CA	Whole	3,010,232	06/059
CALIFORNIA	Riverside County	Riverside, Los Angeles, Orange, & San Bernardino Counties; South Coast Air Basin, CA	Part	1,692,996	06/065
CALIFORNIA	Sacramento County	Sacramento County, CA	Whole	1,418,788	06/067
CALIFORNIA	San Bernardino County	Riverside, Los Angeles, Orange, & San Bernardino Counties; South Coast Air Basin, CA	Part	1,583,687	06/071
CALIFORNIA	San Joaquin County	San Joaquin Valley Air Basin, CA	Whole	685,306	06/077
CALIFORNIA	Stanislaus County	San Joaquin Valley Air Basin, CA	Whole	514,453	06/099
CALIFORNIA	Tulare County	San Joaquin Valley Air Basin, CA	Whole	442,179	06/107
COLORADO	Adams County	Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO	Part	432,838	08/001
COLORADO	Arapahoe County	Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO	Part	567,075	08/005
COLORADO	Archuleta County	Archuleta County; Pagosa Springs, CO	Part	2,261	08/007
COLORADO	Boulder County	Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO	Part	294,556	08/013
COLORADO	Broomfield County	Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO	Whole	55,889	08/014
COLORADO	Denver County	Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO	Whole	600,158	08/031
COLORADO	Douglas County	Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO	Whole	285,465	08/035
COLORADO	Fremont County	Fremont County; Canon City Area, CO	Part	18,860	08/043
COLORADO	Jefferson County	Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO	Whole	534,543	08/059
COLORADO	Pitkin County	Pitkin County; Aspen, CO	Part	6,772	08/097
COLORADO	Prowers County	Prowers County; Lamar, CO	Part	7,523	08/099
COLORADO	Routt County	Routt County (part); Steamboat Springs, CO	Part	12,088	08/107
COLORADO	San Miguel County	San Miguel County; Telluride, CO	Part	2,014	08/113
IDAHO	Ada County	Ada County; Boise, ID	Part	240,254	16/001
IDAHO	Bannock County	Power-Bannock Counties; Portneuf Valley Area, ID	Part	65,778	16/005
IDAHO	Bonner County	Bonner County; The Sandpoint Area, ID	Part	40,876	16/017
IDAHO	Power County	Power-Bannock Counties; Portneuf Valley Area, ID	Part	6,618	16/077
IDAHO	Shoshone County	Shoshone County; City of Pinehurst, ID	Part	1,578	16/079
IDAHO	Shoshone County	Shoshone County; Pinehurst Expansion Area, ID	Part	9,691	16/079
ILLINOIS	Cook County	Cook County; Lyons Township, IL	Part	111,688	17/031
ILLINOIS	Cook County	Cook County; Southeast Chicago, IL	Part	3,117	17/031
ILLINOIS	LaSalle County	LaSalle County; Oglesby, IL	Part	3,862	17/099
ILLINOIS	Madison County	Madison County; Granite City Township and Nameoki Township, IL	Part	35,652	17/119
INDIANA	Lake County	Lake County; Cities of East Chicago, Hammond, Whiting, and Gary, IN	Part	214,867	18/089
INDIANA	Vermillion County	Vermillion County; Part of Clinton Township, IN	Part	9,119	18/165
MAINE	Aroostook County	Aroostock County; City of Presque Isle, ME	Part	972	23/003
MICHIGAN	Wayne County	Wayne County, MI	Part	713,777	26/163
MINNESOTA	Olmsted County	Olmsted County, MN	Part	96,199	27/109
MINNESOTA	Ramsey County	Ramsey County, MN	Part	284,783	27/123
MONTANA	Flathead County	Flathead County; Columbia Falls and vicinity, MT	Part	4,610	30/029
MONTANA	Flathead County	Flathead County; Kalispell and vicinity, MT	Part	18,422	30/029
MONTANA	Flathead County	Flathead County; Whitefish and vicinity, MT	Part	6,138	30/029
MONTANA	Lincoln County	Lincoln County; Libby and vicinity, MT	Part	3,378	30/053
MONTANA	Missoula County	Missoula, MT	Part	59,733	30/063
MONTANA	Sanders County	Sanders County (part); Thompson Falls and vicinity, MT	Part	1,317	30/089
MONTANA	Silver Bow County	Silver Bow County; Butte, MT	Part	34,201	30/093
NEVADA	Clark County	Clark County; Las Vegas planning area, NV	Part	1,951,248	32/003
NEVADA	Washoe County	Washoe County; Reno planning area, NV	Part	421,404	32/031
OHIO	Cuyahoga County	Cuyahoga County, OH	Whole	1,280,122	39/035
OHIO	Jefferson County	Jefferson County, OH	Part	3,472	39/081
OREGON	Jackson County	Jackson County; Medford-Ashland (including White City), OR	Part	87,458	41/029
OREGON	Josephine County	Josephine County; Grants Pass, OR	Part	22,449	41/033
OREGON	Klamath County	Klamath Falls, OR	Part	20,703	41/035
OREGON	Lake County	Lake County (part); Lakeview, OR	Part	3,296	41/037
OREGON	Lane County	Lane County (part); Oakridge, OR	Part	3,728	41/039
OREGON	Lane County	Lane County; Eugene/Springfield, OR	Part	195,160	41/039
OREGON	Union County	Union County; LaGrande, OR	Part	13,094	41/061
PENNSYLVANIA	Allegheny County	Allegheny County; Liberty, Lincoln, Port Vue, Glassport, Clairton, PA	Part	18,700	42/003
PUERTO RICO	Guaynabo Municipio	Mun. of Guaynabo, PR	Part	90,470	72/061
UTAH	Salt Lake County	Salt Lake County, UT	Whole	1,029,655	49/035
UTAH	Utah County	Utah County, UT	Whole	516,564	49/049
UTAH	Weber County	Ogden, UT	Part	82,825	49/057
WASHINGTON	King County	King County; Kent, WA	Part	47,315	53/033
WASHINGTON	King County	King County; Seattle, WA	Part	661,062	53/033
WASHINGTON	Pierce County	Pierce County; Tacoma, WA	Part	238,725	53/053
WASHINGTON	Spokane County	Spokane County, WA	Part	230,807	53/063
WASHINGTON	Thurston County	Thurston County; Cities of Olympia, Tumwater, and Lacey, WA	Part	98,562	53/067
WASHINGTON	Walla Walla County	Walla Walla County; Wallula, WA	Part	426	53/071
WASHINGTON	Yakima County	Yakima County, WA	Part	69,565	53/077
WEST VIRGINIA	Brooke County	Brooke; Follansbee area, WV	Part	2,674	54/009
WEST VIRGINIA	Brooke County	Hancock and Brooke Counties (Part); The city of Weirton, WV	Part	4,621	54/009
WEST VIRGINIA	Hancock County	Hancock and Brooke Counties (Part); The city of Weirton, WV	Part	9,578	54/029
WYOMING	Sheridan County	Sheridan County; City of Sheridan, WY	Part	17,300	56/033

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