Carbon Monoxide (1971) Maintenance Areas (Redesignated from Nonattainment) by State/County/Area

Data is current as of March 31, 2024

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, AK	Part	286,227	02/020
ALASKA	Fairbanks North Star Borough	Fairbanks, AK	Part	46,211	02/090
ARIZONA	Maricopa County	Phoenix, AZ	Part	3,763,324	04/013
ARIZONA	Pima County	Tucson, AZ	Part	595,314	04/019
CALIFORNIA	Alameda County	San Francisco-Oakland-San Jose, CA	Part	715,578	06/001
CALIFORNIA	Butte County	Chico, CA	Part	86,963	06/007
CALIFORNIA	Contra Costa County	San Francisco-Oakland-San Jose, CA	Part	848,335	06/013
CALIFORNIA	El Dorado County	Lake Tahoe South Shore, CA	Part	43,110	06/017
CALIFORNIA	Fresno County	Fresno, CA	Part	631,483	06/019
CALIFORNIA	Kern County	Bakersfield, CA	Part	468,092	06/029
CALIFORNIA	Los Angeles County	Los Angeles-South Coast Air Basin, CA	Part	9,512,219	06/037
CALIFORNIA	Marin County	San Francisco-Oakland-San Jose, CA	Part	219,393	06/041
CALIFORNIA	Napa County	San Francisco-Oakland-San Jose, CA	Part	123,217	06/055
CALIFORNIA	Orange County	Los Angeles-South Coast Air Basin, CA	Whole	3,010,232	06/059
CALIFORNIA	Placer County	Lake Tahoe North Shore, CA	Part	16,132	06/061
CALIFORNIA	Placer County	Sacramento, CA	Part	102,822	06/061
CALIFORNIA	Riverside County	Los Angeles-South Coast Air Basin, CA	Part	1,692,996	06/065
CALIFORNIA	Sacramento County	Sacramento, CA	Part	1,381,740	06/067
CALIFORNIA	San Bernardino County	Los Angeles-South Coast Air Basin, CA	Part	1,583,687	06/071
CALIFORNIA	San Diego County	San Diego, CA	Part	2,909,194	06/073
CALIFORNIA	San Francisco County	San Francisco-Oakland-San Jose, CA	Whole	805,235	06/075
CALIFORNIA	San Joaquin County	Stockton, CA	Part	373,545	06/077
CALIFORNIA	San Mateo County	San Francisco-Oakland-San Jose, CA	Part	497,688	06/081
CALIFORNIA	Santa Clara County	San Francisco-Oakland-San Jose, CA	Part	594,906	06/085
CALIFORNIA	Solano County	San Francisco-Oakland-San Jose, CA	Part	242,850	06/095
CALIFORNIA	Sonoma County	San Francisco-Oakland-San Jose, CA	Part	249,297	06/097
CALIFORNIA	Stanislaus County	Modesto, CA	Part	320,707	06/099
CALIFORNIA	Yolo County	Sacramento, CA	Part	45,554	06/113
COLORADO	Adams County	Denver-Boulder, CO	Part	432,838	08/001
COLORADO	Arapahoe County	Denver-Boulder, CO	Part	567,075	08/005
COLORADO	Boulder County	Denver-Boulder, CO	Part	203,419	08/013
COLORADO	Boulder County	Longmont, CO	Part	36,697	08/013
COLORADO	Broomfield County	Denver-Boulder, CO	Whole	55,889	08/014
COLORADO	Denver County	Denver-Boulder, CO	Whole	600,158	08/031
COLORADO	Douglas County	Denver-Boulder, CO	Part	236,334	08/035
COLORADO	El Paso County	Colorado Springs, CO	Part	540,760	08/041
COLORADO	Jefferson County	Denver-Boulder, CO	Part	514,924	08/059
COLORADO	Larimer County	Fort Collins, CO	Part	170,639	08/069
COLORADO	Teller County	Colorado Springs, CO	Part	14,982	08/119
COLORADO	Weld County	Greeley, CO	Part	138,101	08/123
COLORADO	Weld County	Longmont, CO	Part	49,861	08/123
CONNECTICUT	Fairfield County	New Haven-Meriden-Waterbury, CT	Part	39,579	09/001
CONNECTICUT	Fairfield County	New York-N. New Jersey-Long Island, NY-NJ-CT	Part	877,270	09/001
CONNECTICUT	Hartford County	Hartford-New Britain-Middletown, CT	Part	891,900	09/003
CONNECTICUT	Litchfield County	Hartford-New Britain-Middletown, CT	Part	12,127	09/005
CONNECTICUT	Litchfield County	New Haven-Meriden-Waterbury, CT	Part	43,556	09/005
CONNECTICUT	Litchfield County	New York-N. New Jersey-Long Island, NY-NJ-CT	Part	30,172	09/005
CONNECTICUT	Middlesex County	Hartford-New Britain-Middletown, CT	Part	113,405	09/007
CONNECTICUT	New Haven County	New Haven-Meriden-Waterbury, CT	Whole	862,477	09/009
CONNECTICUT	Tolland County	Hartford-New Britain-Middletown, CT	Part	89,246	09/013
DISTRICT OF COLUMBIA	District of Columbia	Washington, DC-MD-VA	Whole	601,723	11/001
IDAHO	Ada County	Boise-Northern Ada County, ID	Part	257,440	16/001
INDIANA	Lake County	East Chicago, IN	Part	5,208	18/089
INDIANA	Marion County	Indianapolis, IN	Part	61,160	18/097
MARYLAND	Baltimore city	Baltimore, MD	Part	15,455	24/510
MARYLAND	Montgomery County	Washington, DC-MD-VA	Part	474,416	24/031
MARYLAND	Prince George's County	Washington, DC-MD-VA	Part	369,359	24/033
MASSACHUSETTS	Hampden County	Springfield, MA	Part	153,060	25/013
MASSACHUSETTS	Middlesex County	Boston, MA	Part	338,206	25/017
MASSACHUSETTS	Middlesex County	Lowell, MA	Part	106,519	25/017
MASSACHUSETTS	Middlesex County	Waltham, MA	Part	60,632	25/017
MASSACHUSETTS	Norfolk County	Boston, MA	Part	92,271	25/021
MASSACHUSETTS	Suffolk County	Boston, MA	Part	704,526	25/025
MASSACHUSETTS	Worcester County	Worcester, MA	Part	181,045	25/027
MICHIGAN	Macomb County	Detroit, MI	Part	295,428	26/099
MICHIGAN	Oakland County	Detroit, MI	Part	435,027	26/125
MICHIGAN	Wayne County	Detroit, MI	Part	651,784	26/163
MINNESOTA	Anoka County	Minneapolis-St. Paul, MN	Whole	330,844	27/003
MINNESOTA	Carver County	Minneapolis-St. Paul, MN	Part	77,969	27/019
MINNESOTA	Dakota County	Minneapolis-St. Paul, MN	Part	380,675	27/037
MINNESOTA	Hennepin County	Minneapolis-St. Paul, MN	Whole	1,152,425	27/053
MINNESOTA	Ramsey County	Minneapolis-St. Paul, MN	Whole	508,640	27/123
MINNESOTA	Scott County	Minneapolis-St. Paul, MN	Part	119,772	27/139
MINNESOTA	St. Louis County	Duluth, MN	Part	85,857	27/137
MINNESOTA	Washington County	Minneapolis-St. Paul, MN	Part	236,399	27/163
MINNESOTA	Wright County	Minneapolis-St. Paul, MN	Part	113,454	27/171
MISSOURI	St. Louis County	St. Louis, MO	Part	908,233	29/189
MISSOURI	St. Louis city	St. Louis, MO	Whole	319,294	29/510
MONTANA	Cascade County	Great Falls, MT	Part	57,573	30/013
MONTANA	Missoula County	Missoula, MT	Part	59,733	30/063
MONTANA	Yellowstone County	Billings, MT	Part	104,360	30/111
NEVADA	Carson City	Lake Tahoe, NV	Part	10,342	32/510
NEVADA	Clark County	Las Vegas, NV	Part	679,034	32/003
NEVADA	Douglas County	Lake Tahoe, NV	Part	10,401	32/005
NEVADA	Washoe County	Lake Tahoe, NV	Part	12,516	32/031
NEVADA	Washoe County	Reno, NV	Part	221,743	32/031
NEW HAMPSHIRE	Hillsborough County	Manchester, NH	Part	109,565	33/011
NEW HAMPSHIRE	Hillsborough County	Nashua, NH	Part	86,494	33/011
NEW JERSEY	Atlantic County	Atlantic City, NJ	Part	44,944	34/001
NEW JERSEY	Bergen County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	905,116	34/003
NEW JERSEY	Burlington County	Burlington, NJ	Part	10,993	34/005
NEW JERSEY	Camden County	Philadelphia-Camden County, PA-NJ	Whole	513,657	34/007
NEW JERSEY	Essex County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	783,969	34/013
NEW JERSEY	Hudson County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	634,266	34/017
NEW JERSEY	Mercer County	Trenton, NJ	Part	97,712	34/021
NEW JERSEY	Middlesex County	Perth Amboy, NJ	Part	49,645	34/023
NEW JERSEY	Monmouth County	Freehold, NJ	Part	12,734	34/025
NEW JERSEY	Morris County	Morristown, NJ	Part	21,955	34/027
NEW JERSEY	Ocean County	Toms River, NJ	Part	10,667	34/029
NEW JERSEY	Passaic County	New York-N. New Jersey-Long Island, NY-NJ-CT	Part	300,116	34/031
NEW JERSEY	Salem County	Penns Grove, NJ	Part	5,201	34/033
NEW JERSEY	Somerset County	Somerville, NJ	Part	15,557	34/035
NEW JERSEY	Union County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	536,499	34/039
NEW MEXICO	Bernalillo County	Albuquerque, NM	Whole	662,564	35/001
NEW YORK	Bronx County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	1,385,108	36/005
NEW YORK	Kings County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	2,504,700	36/047
NEW YORK	Nassau County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	1,339,532	36/059
NEW YORK	New York County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	1,585,873	36/061
NEW YORK	Onondaga County	Syracuse, NY	Whole	467,026	36/067
NEW YORK	Queens County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	2,230,722	36/081
NEW YORK	Richmond County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	468,730	36/085
NEW YORK	Westchester County	New York-N. New Jersey-Long Island, NY-NJ-CT	Whole	949,113	36/119
NORTH CAROLINA	Durham County	Raleigh-Durham, NC	Whole	267,587	37/063
NORTH CAROLINA	Forsyth County	Winston-Salem, NC	Whole	350,670	37/067
NORTH CAROLINA	Mecklenburg County	Charlotte, NC	Whole	919,628	37/119
NORTH CAROLINA	Wake County	Raleigh-Durham, NC	Whole	900,993	37/183
OHIO	Cuyahoga County	Cleveland, OH	Whole	1,280,122	39/035
OREGON	Clackamas County	Portland, OR	Part	233,262	41/005
OREGON	Jackson County	Medford, OR	Part	86,056	41/029
OREGON	Josephine County	Grants Pass, OR	Part	22,449	41/033
OREGON	Klamath County	Klamath Falls, OR	Part	20,703	41/035
OREGON	Lane County	Eugene-Springfield, OR	Part	234,972	41/039
OREGON	Marion County	Salem, OR	Part	80,695	41/047
OREGON	Multnomah County	Portland, OR	Part	629,654	41/051
OREGON	Polk County	Salem, OR	Part	75,405	41/053
OREGON	Washington County	Portland, OR	Part	467,557	41/067
PENNSYLVANIA	Allegheny County	Pittsburgh, PA	Part	320,395	42/003
PENNSYLVANIA	Philadelphia County	Philadelphia-Camden County, PA-NJ	Part	673,750	42/101
TENNESSEE	Shelby County	Memphis, TN	Whole	927,644	47/157
TEXAS	El Paso County	El Paso, TX	Part	73,100	48/141
UTAH	Salt Lake County	Salt Lake City, UT	Part	186,440	49/035
UTAH	Utah County	Provo, UT	Part	166,596	49/049
UTAH	Weber County	Ogden, UT	Part	82,825	49/057
VIRGINIA	Alexandria city	Washington, DC-MD-VA	Whole	139,966	51/510
VIRGINIA	Arlington County	Washington, DC-MD-VA	Whole	207,627	51/013
WASHINGTON	Clark County	Vancouver, WA	Part	400,271	53/011
WASHINGTON	King County	Seattle-Tacoma, WA	Part	1,693,693	53/033
WASHINGTON	Pierce County	Seattle-Tacoma, WA	Part	697,408	53/053
WASHINGTON	Snohomish County	Seattle-Tacoma, WA	Part	625,609	53/061
WASHINGTON	Spokane County	Spokane, WA	Part	363,834	53/063
WASHINGTON	Yakima County	Yakima, WA	Part	69,565	53/077

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