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PM-10 (1987) Designated Area/State Information

Data is current as of November 30, 2022

Display:       Nonattainment and Maintenance Areas       Nonattainment Areas       Maintenance Areas
Area Name  State  Current Status  class sort Current
Classification
or at
Redesignation
 
No.
Counties
 
2010
Population
 
EPA
Region
 
Click underlined column heading to change report order.
click area name for state/county list
click for
Classification history
 
Total
Areas

Total
Counties
Total
Population
(2010)
 
Nonattainment 21 19 7,190,423  
Maintenance 68 77 33,390,743  
Nonattainment and Maintenance 89 87 40,581,166  
Ada County; Boise, ID ID Maintenance B Moderate 1 240,254 10
Adams, Denver, and Boulder Counties; Denver Metropolitan area, CO CO Maintenance B Moderate 7 2,770,524 08
Allegheny County; Liberty, Lincoln, Port Vue, Glassport, Clairton, P PA Maintenance B Moderate 1 18,700 03
Anchorage; Eagle River, AK AK Maintenance B Moderate 1 219,193 10
Archuleta County; Pagosa Springs, CO CO Maintenance B Moderate 1 2,261 08
Aroostock County; City of Presque Isle, ME ME Maintenance B Moderate 1 972 01
Bonner County; The Sandpoint Area, ID ID Maintenance B Moderate 1 40,876 10
Brooke; Follansbee area, WV WV Maintenance B Moderate 1 2,674 03
Clark County; Las Vegas planning area, NV NV Maintenance A Serious 1 1,951,248 09
Cochise County; Paul Spur/Douglas planning area, AZ AZ Nonattainment B Moderate 1 17,495 09
Cook County; Lyons Township, IL IL Maintenance B Moderate 1 111,688 05
Cook County; Southeast Chicago, IL IL Maintenance B Moderate 1 3,117 05
Coso Junction, CA CA Maintenance B Moderate 1 7,333 09
Cuyahoga County, OH OH Maintenance B Moderate 1 1,280,122 05
Dona Ana County; Anthony, NM NM Nonattainment B Moderate 1 3,096 06
East Kern County, CA CA Nonattainment A Serious 1 125,950 09
El Paso County, TX TX Nonattainment B Moderate 1 649,121 06
Flathead County; Columbia Falls and vicinity, MT MT Maintenance B Moderate 1 4,610 08
Flathead County; Kalispell and vicinity, MT MT Maintenance B Moderate 1 18,422 08
Flathead County; Whitefish and vicinity, MT MT Maintenance B Moderate 1 6,138 08
Fremont County; Canon City Area, CO CO Maintenance B Moderate 1 18,860 08
Gila County (part): Payson, AZ AZ Maintenance B Moderate 1 5,333 09
Hancock and Brooke Counties (Part); The city of Weirton, WV WV Maintenance B Moderate 2 14,199 03
Hayden, AZ AZ Nonattainment B Moderate 2 11,048 09
Imperial Valley, CA CA Maintenance A Serious 1 146,905 09
Indian Wells, CA CA Maintenance B Moderate 1 15,449 09
Inyo County; Owens Valley planning area, CA CA Nonattainment A Serious 1 7,333 09
Jackson County; Medford-Ashland (including White City), OR OR Maintenance B Moderate 1 87,458 10
Jefferson County, OH OH Maintenance B Moderate 1 3,472 05
Josephine County; Grants Pass, OR OR Maintenance B Moderate 1 22,449 10
Juneau; Mendenhall Valley area, AK AK Maintenance B Moderate 1 14,030 10
King County; Kent, WA WA Maintenance B Moderate 1 47,315 10
King County; Seattle, WA WA Maintenance B Moderate 1 661,062 10
Klamath Falls, OR OR Maintenance B Moderate 1 20,703 10
LaSalle County; Oglesby, IL IL Maintenance B Moderate 1 3,862 05
Lake County (part); Lakeview, OR OR Maintenance B Moderate 1 3,296 10
Lake County; Cities of East Chicago, Hammond, Whiting, and Gary, IN IN Maintenance B Moderate 1 214,867 05
Lake County; Polson, MT MT Nonattainment B Moderate 1 4,099 08
Lake County; Ronan, MT MT Nonattainment B Moderate 1 2,734 08
Lane County (part); Oakridge, OR OR Maintenance B Moderate 1 3,728 10
Lane County; Eugene/Springfield, OR OR Maintenance B Moderate 1 195,160 10
Lincoln County; Libby and vicinity, MT MT Maintenance B Moderate 1 3,378 08
Madison County; Granite City Township and Nameoki Township, IL IL Maintenance B Moderate 1 35,652 05
Maricopa and Pinal Counties; Phoenix planning area, AZ AZ Nonattainment A Serious 2 3,852,985 09
Miami, AZ AZ Nonattainment B Moderate 2 15,218 09
Missoula, MT MT Maintenance B Moderate 1 59,733 08
Mohave County (part); Bullhead City, AZ AZ Maintenance B Moderate 1 10,710 09
Mono Basin, CA CA Nonattainment B Moderate 1 285 09
Mono County; Mammoth Lake planning area, CA CA Maintenance B Moderate 1 7,133 09
Mun. of Guaynabo, PR PR Maintenance B Moderate 1 90,470 02
New York County, NY NY Nonattainment B Moderate 1 1,585,873 02
Ogden, UT UT Maintenance B Moderate 1 82,825 08
Olmsted County, MN MN Maintenance B Moderate 1 96,199 05
Pierce County; Tacoma, WA WA Maintenance B Moderate 1 238,725 10
Pima County; Ajo planning area, AZ AZ Maintenance B Moderate 1 8,823 09
Pima County; Rillito planning area, AZ AZ Nonattainment B Moderate 1 588 09
Pinal County (part); West Pinal, AZ AZ Nonattainment A Serious 1 283,032 09
Pitkin County; Aspen, CO CO Maintenance B Moderate 1 6,772 08
Power-Bannock Counties; Fort Hall Indian Reservation, ID ID Nonattainment B Moderate 2 591 10
Power-Bannock Counties; Portneuf Valley Area, ID ID Maintenance B Moderate 2 72,396 10
Prowers County; Lamar, CO CO Maintenance B Moderate 1 7,523 08
Ramsey County, MN MN Maintenance B Moderate 1 284,783 05
Riverside County; Coachella Valley planning area, CA CA Nonattainment A Serious 1 257,794 09
Riverside, Los Angeles, Orange, & San Bernardino Counties; South Coa CA Maintenance A Serious 4 15,799,134 09
Rosebud County; Lame Deer, MT MT Nonattainment B Moderate 1 527 08
Routt County (part); Steamboat Springs, CO CO Maintenance B Moderate 1 12,088 08
Sacramento County, CA CA Maintenance B Moderate 1 1,418,788 09
Salt Lake County, UT UT Maintenance B Moderate 1 1,029,655 08
San Bernardino County, CA CA Nonattainment B Moderate 1 237,418 09
San Joaquin Valley Air Basin, CA CA Maintenance A Serious 8 3,830,257 09
San Miguel County; Telluride, CO CO Maintenance B Moderate 1 2,014 08
Sanders County (part); Thompson Falls and vicinity, MT MT Maintenance B Moderate 1 1,317 08
Santa Cruz County; Nogales planning area, AZ AZ Nonattainment B Moderate 1 30,359 09
Sheridan County; City of Sheridan, WY WY Maintenance B Moderate 1 17,300 08
Shoshone County; City of Pinehurst, ID ID Maintenance B Moderate 1 1,578 10
Shoshone County; Pinehurst Expansion Area, ID ID Maintenance B Moderate 1 9,691 10
Silver Bow County; Butte, MT MT Maintenance B Moderate 1 34,201 08
Spokane County, WA WA Maintenance B Moderate 1 230,807 10
Thurston County; Cities of Olympia, Tumwater, and Lacey, WA WA Maintenance B Moderate 1 98,562 10
Trona, CA CA Nonattainment B Moderate 1 4,167 09
Union County; LaGrande, OR OR Maintenance B Moderate 1 13,094 10
Utah County, UT UT Maintenance B Moderate 1 516,564 08
Vermillion County; Part of Clinton Township, IN IN Maintenance B Moderate 1 9,119 05
Walla Walla County; Wallula, WA WA Maintenance A Serious 1 426 10
Washoe County; Reno planning area, NV NV Maintenance A Serious 1 421,404 09
Wayne County, MI MI Maintenance B Moderate 1 713,777 05
Yakima County, WA WA Maintenance B Moderate 1 69,565 10
Yuma, AZ AZ Nonattainment B Moderate 1 100,710 09

County subtotals and grand totals may not equal sum of the counties. Part counties are only counted one time within groupings. Multi-state areas are counted only once in area totals, and are counted in maintenance totals when all states in the area have been redesignated.

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