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PM-10 (1987) Designated Area/State Information

Data is current as of October 31, 2020

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 25 23 7,235,807  
Maintenance 64 76 33,475,138  
Nonattainment and Maintenance 89 88 40,710,945  
Ajo (Pima County), AZ AZ Maintenance B Moderate 1 8,823 09
Anthony, NM NM Nonattainment B Moderate 1 3,096 06
Aspen, CO CO Maintenance B Moderate 1 6,772 08
Boise-Northern Ada County, ID ID Maintenance B Moderate 1 240,254 10
Bonner Co (Sandpoint), ID ID Maintenance B Moderate 1 40,876 10
Butte, MT MT Nonattainment B Moderate 1 34,201 08
Canon City, CO CO Maintenance B Moderate 1 18,860 08
Clairton & 4 Boroughs, PA PA Maintenance B Moderate 1 18,700 03
Clark Co, NV NV Maintenance A Serious 1 1,951,248 09
Coachella Valley, CA CA Nonattainment A Serious 1 257,794 09
Columbia Falls, MT MT Maintenance B Moderate 1 4,610 08
Coso Junction, CA CA Maintenance B Moderate 1 7,333 09
Cuyahoga Co, OH OH Maintenance B Moderate 1 1,280,122 05
Denver Metro, CO CO Maintenance B Moderate 7 2,770,524 08
Eagle River, AK AK Maintenance B Moderate 1 219,193 10
East Chicago, IN IN Maintenance B Moderate 1 214,867 05
East Kern Co, CA CA Nonattainment A Serious 1 125,950 09
El Paso Co, TX TX Nonattainment B Moderate 1 649,121 06
Eugene-Springfield, OR OR Maintenance B Moderate 1 195,160 10
Flathead County; Whitefish and vicinity, MT MT Nonattainment B Moderate 1 6,138 08
Follansbee, WV WV Maintenance B Moderate 1 2,674 03
Fort Hall Indian Reservation ID Nonattainment B Moderate 2 591 10
Granite City, Nameoki Twsp, IL IL Maintenance B Moderate 1 35,652 05
Grants Pass, OR OR Maintenance B Moderate 1 22,449 10
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
Jefferson Co, OH OH Maintenance B Moderate 1 3,472 05
Juneau, AK AK Maintenance B Moderate 1 14,030 10
Kalispell, MT MT Maintenance B Moderate 1 18,422 08
Kent, WA WA Maintenance B Moderate 1 47,315 10
King Co, WA WA Maintenance B Moderate 1 661,062 10
Klamath Falls, OR OR Maintenance B Moderate 1 20,703 10
LaGrande, OR OR Maintenance B Moderate 1 13,094 10
Lake Co, OR OR Maintenance B Moderate 1 3,296 10
Lamar, CO CO Maintenance B Moderate 1 7,523 08
Lame Deer, MT MT Nonattainment B Moderate 1 527 08
Lane Co, OR OR Nonattainment B Moderate 1 3,728 10
Libby, MT MT Maintenance B Moderate 1 3,378 08
Los Angeles South Coast Air Basin, CA CA Maintenance A Serious 4 15,799,134 09
Lyons Twsp., IL IL Maintenance B Moderate 1 111,688 05
Mammoth Lake, CA CA Maintenance B Moderate 1 7,133 09
Medford-Ashland, OR OR Maintenance B Moderate 1 87,458 10
Miami, AZ AZ Nonattainment B Moderate 2 15,218 09
Missoula, MT MT Maintenance B Moderate 1 59,733 08
Mohave Co, AZ AZ Maintenance B Moderate 1 10,710 09
Mono Basin, CA CA Nonattainment B Moderate 1 285 09
Mun. of Guaynabo, PR PR Maintenance B Moderate 1 90,470 02
New Haven Co, CT CT Maintenance B Moderate 1 129,779 01
New York Co, NY NY Nonattainment B Moderate 1 1,585,873 02
Nogales, AZ AZ Nonattainment B Moderate 1 30,359 09
Ogden, UT UT Maintenance B Moderate 1 82,825 08
Oglesby, IL IL Maintenance B Moderate 1 3,862 05
Olmsted Co, MN MN Maintenance B Moderate 1 96,199 05
Olympia, Tumwater, Lacey, WA WA Maintenance B Moderate 1 98,562 10
Owens Valley, CA CA Nonattainment A Serious 1 7,333 09
Pagosa Springs, CO CO Maintenance B Moderate 1 2,261 08
Paul Spur/Douglas (Cochise County), AZ AZ Nonattainment B Moderate 1 17,495 09
Payson, AZ AZ Maintenance B Moderate 1 5,333 09
Phoenix, AZ AZ Nonattainment A Serious 2 3,852,985 09
Pierce Co, WA WA Maintenance B Moderate 1 238,725 10
Pinehurst, ID ID Maintenance B Moderate 1 1,578 10
Polson, MT MT Nonattainment B Moderate 1 4,099 08
Portneuf Valley, ID ID Maintenance B Moderate 2 72,396 10
Presque Isle, ME ME Maintenance B Moderate 1 972 01
Ramsey Co, MN MN Maintenance B Moderate 1 284,783 05
Rillito, AZ AZ Nonattainment B Moderate 1 588 09
Ronan, MT MT Nonattainment B Moderate 1 2,734 08
Sacramento Co, CA CA Maintenance B Moderate 1 1,418,788 09
Salt Lake Co, UT UT Maintenance B Moderate 1 1,029,655 08
San Bernardino Co, CA CA Nonattainment B Moderate 1 237,418 09
San Joaquin Valley Air Basin, CA CA Maintenance A Serious 8 3,830,257 09
Sanders County (part); Thompson Falls and vicinity, MT MT Nonattainment B Moderate 1 1,317 08
Sheridan, WY WY Maintenance B Moderate 1 17,300 08
Shoshone Co, ID ID Maintenance B Moderate 1 9,691 10
Southeast Chicago, IL IL Maintenance B Moderate 1 3,117 05
Spokane Co, WA WA Maintenance B Moderate 1 230,807 10
Steamboat Springs, CO CO Maintenance B Moderate 1 12,088 08
Telluride, CO CO Maintenance B Moderate 1 2,014 08
Trona, CA CA Nonattainment B Moderate 1 4,167 09
Utah Co, UT UT Maintenance B Moderate 1 516,564 08
Vermillion Co, IN IN Maintenance B Moderate 1 9,119 05
Wallula, WA WA Maintenance A Serious 1 426 10
Washoe Co, NV NV Maintenance A Serious 1 421,404 09
Wayne Co, MI MI Maintenance B Moderate 1 713,777 05
Weirton, WV WV Maintenance B Moderate 2 14,199 03
West Pinal, AZ AZ Nonattainment A Serious 1 283,032 09
Yakima Co, 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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