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Maintenance Classified Carbon Monoxide Areas

As of December 05, 2013
Current and historical design value data can be found at http://www.epa.gov/airtrends/values.html
Areas Listed Alphabetically Classification No.
Counties
NAA
2010
Population
EPA
Region
State
Albuquerque, NM Moderate <= 12.7ppm 1 662,564    6 NM
Anchorage, AK Serious 1 286,227    10 AK
Baltimore, MD Moderate <= 12.7ppm 1 15,455    3 MD
Boston, MA Moderate <= 12.7ppm 3 1,135,003    1 MA
Chico, CA Moderate <= 12.7ppm 1 86,963    9 CA
Cleveland, OH Moderate <= 12.7ppm 1 1,280,122    5 OH
Colorado Springs, CO Moderate <= 12.7ppm 2 555,742    8 CO
Denver-Boulder, CO Serious 7 2,610,637    8 CO
Duluth, MN Moderate <= 12.7ppm 1 85,857    5 MN
El Paso, TX Moderate <= 12.7ppm 1 73,100    6 TX
Fairbanks, AK Serious 1 46,211    10 AK
Fort Collins, CO Moderate <= 12.7ppm 1 170,639    8 CO
Fresno, CA Moderate > 12.7ppm 1 631,483    9 CA
Grants Pass, OR Moderate <= 12.7ppm 1 22,449    10 OR
Hartford-New Britain-Middletown, CT Moderate <= 12.7ppm 4 1,106,678    1 CT
Klamath Falls, OR Moderate <= 12.7ppm 1 20,703    10 OR
Lake Tahoe South Shore, CA Moderate <= 12.7ppm 1 43,110    9 CA
Las Vegas, NV Serious 1 679,034    9 NV
Longmont, CO Moderate <= 12.7ppm 2 86,558    8 CO
Los Angeles-South Coast Air Basin, CA Serious 4 15,799,134    9 CA
Medford, OR Moderate <= 12.7ppm 1 86,056    10 OR
Memphis, TN Moderate <= 12.7ppm 1 927,644    4 TN
Minneapolis-St. Paul, MN Moderate <= 12.7ppm 8 2,920,178    5 MN
Missoula, MT Moderate <= 12.7ppm 1 59,733    8 MT
Modesto, CA Moderate <= 12.7ppm 1 320,707    9 CA
New York-N. New Jersey-Long Island, NY-NJ-CT Moderate > 12.7ppm 14 14,531,186    2 2 1 NY-NJ-CT
Ogden, UT Moderate <= 12.7ppm 1 82,825    8 UT
Philadelphia-Camden Co, PA-NJ Moderate <= 12.7ppm 2 1,187,407    3 2 PA-NJ
Phoenix, AZ Serious 1 3,763,324    9 AZ
Portland, OR Moderate <= 12.7ppm 3 1,330,473    10 OR
Provo, UT Moderate > 12.7ppm 1 166,596    8 UT
Raleigh-Durham, NC Moderate <= 12.7ppm 2 1,168,580    4 NC
Reno, NV Moderate <= 12.7ppm 1 221,743    9 NV
Sacramento, CA Moderate <= 12.7ppm 3 1,530,116    9 CA
San Diego, CA Moderate <= 12.7ppm 1 2,909,194    9 CA
San Francisco-Oakland-San Jose, CA Moderate <= 12.7ppm 9 4,296,499    9 CA
Seattle-Tacoma, WA Moderate > 12.7ppm 3 3,016,710    10 WA
Spokane, WA Serious 1 363,834    10 WA
Stockton, CA Moderate <= 12.7ppm 1 373,545    9 CA
Syracuse, NY Moderate <= 12.7ppm 1 467,026    2 NY
Vancouver, WA Moderate <= 12.7ppm 1 400,271    10 WA
Washington, DC-MD-VA Moderate <= 12.7ppm 5 1,793,091    3 3 3 DC-MD-VA
Winston-Salem, NC Moderate <= 12.7ppm 1 350,670    4 NC
 
43 Total Areas 97 67,665,077     

The county total is adjusted to count a single county only once (in the case where part of a county may be in multiple maintenance areas). Any multi-state areas are counted in the nonattainment report until all state areas have been redesignated.


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