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Carbon Monoxide Maintenance State/Area/County Report
As of March 30, 2012| ALASKA (Region X) | |
| Anchorage, AK (Serious) | |
| Anchorage Municipality (P) | |
| Portion of Anchorage urban area | |
| Fairbanks, AK (Serious) | |
| Fairbanks North Star Borough (P) | |
| Portion of Fairbanks urban area | |
| ARIZONA (Region IX) | |
| Phoenix, AZ (Serious) | |
| Maricopa Co (P) | |
| Tucson, AZ (Not Classified) | |
| Pima Co (P) | |
| Portion of Tucson urban area | |
| CALIFORNIA (Region IX) | |
| Bakersfield, CA (Not Classified) | |
| Kern Co (P) | |
| Chico, CA (Moderate <= 12.7ppm) | |
| Butte Co (P) | |
| Fresno, CA (Moderate > 12.7ppm) | |
| Fresno Co (P) | |
| Fresno Urbanized Area (11/20/85, 50 FR 47735) | |
| Lake Tahoe North Shore, CA (Not Classified) | |
| Placer Co (P) | |
| Lake Tahoe South Shore, CA (Moderate <= 12.7ppm) | |
| El Dorado Co (P) | |
| Los Angeles South Coast Air Basin, CA (Serious) | |
| Los Angeles Co (P) | |
| Orange Co | |
| Riverside Co (P) | |
| San Bernardino Co (P) | |
| Modesto, CA (Moderate <= 12.7ppm) | |
| Stanislaus Co (P) | |
| Sacramento, CA (Moderate <= 12.7ppm) | |
| Placer Co (P) | |
| Sacramento Co (P) | |
| Yolo Co (P) | |
| San Diego, CA (Moderate <= 12.7ppm) | |
| San Diego Co (P) | |
| San Francisco-Oakland-San Jose, CA (Moderate <= 12.7ppm) | |
| Alameda Co (P) | |
| Contra Costa Co (P) | |
| Marin Co (P) | |
| Napa Co (P) | |
| San Francisco Co | |
| San Mateo Co (P) | |
| Santa Clara Co (P) | |
| Solano Co (P) | |
| Sonoma Co (P) | |
| Stockton, CA (Moderate <= 12.7ppm) | |
| San Joaquin Co (P) | |
| COLORADO (Region VIII) | |
| Colorado Springs, CO (Moderate <= 12.7ppm) | |
| El Paso Co (P) | |
| Teller Co (P) | |
| Denver-Boulder, CO (Serious) | |
| Adams Co (P) | |
| Denver Metro Area | |
| Arapahoe Co (P) | |
| Denver Metro Area | |
| Boulder Co (P) | |
| Denver Metro Area | |
| Broomfield Co | |
| Denver Co | |
| Douglas Co (P) | |
| Denver Metro Area | |
| Jefferson Co (P) | |
| Denver Metro Area | |
| Fort Collins, CO (Moderate <= 12.7ppm) | |
| Larimer Co (P) | |
| Greeley, CO (Not Classified) | |
| Weld Co (P) | |
| Longmont, CO (Moderate <= 12.7ppm) | |
| Boulder Co (P) | |
| Portion of Longmont | |
| Weld Co (P) | |
| Portion of Longmont | |
| CONNECTICUT (Region I) | |
| Hartford-New Britain-Middletown, CT (Moderate <= 12.7ppm) | |
| Hartford Co (P) | |
| Litchfield Co (P) | |
| Plymouth Town | |
| Middlesex Co (P) | |
| Tolland Co (P) | |
| New Haven-Meriden-Waterbury, CT (Not Classified) | |
| Fairfield Co (P) | |
| Shelton City | |
| Litchfield Co (P) | |
| Bethlehem Town, Thomaston Town, Watertown, Woodbury Town. | |
| New Haven Co | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate > 12.7ppm) | |
| Fairfield Co (P) | |
| All cities and townships except Shelton city | |
| Litchfield Co (P) | |
| Bridgewater town, New Milford town | |
| DISTRICT OF COLUMBIA (Region III) | |
| Washington, DC-MD-VA (Moderate <= 12.7ppm) | |
| Entire District | |
| IDAHO (Region X) | |
| Boise-Northern Ada County, ID (Not Classified) | |
| Ada Co (P) | |
| Northern half of Ada Co | |
| INDIANA (Region V) | |
| East Chicago, IN (Not Classified) | |
| Lake Co (P) | |
| Indianapolis, IN (Not Classified) | |
| Marion Co (P) | |
| MARYLAND (Region III) | |
| Baltimore, MD (Moderate <= 12.7ppm) | |
| Baltimore (City) (P) | |
| Washington, DC-MD-VA (Moderate <= 12.7ppm) | |
| Montgomery Co (P) | |
| Election Districts 4, 7, 13 | |
| Prince George's Co (P) | |
| Election Districts 2, 6, 12, 16, 17, 18 | |
| MASSACHUSETTS (Region I) | |
| Boston, MA (Moderate <= 12.7ppm) | |
| Middlesex Co (P) | |
| Cities of: Cambridge, Everett, Malden, Medford, and Somerville. | |
| Norfolk Co (P) | |
| Quincy CIty | |
| Suffolk Co (P) | |
| Cities of: Boston, Chelsea, and Revere | |
| Lowell, MA (Not Classified) | |
| Middlesex Co (P) | |
| Lowell City | |
| Springfield, MA (Not Classified) | |
| Hampden Co (P) | |
| Springfield City | |
| Waltham, MA (Not Classified) | |
| Middlesex Co (P) | |
| Waltham City | |
| Worcester, MA (Not Classified) | |
| Worcester Co (P) | |
| City of Worcester | |
| MICHIGAN (Region V) | |
| Detroit, MI (Not Classified) | |
| Macomb Co (P) | |
| A portion of Detroit | |
| Oakland Co (P) | |
| A portion of Detroit | |
| Wayne Co (P) | |
| A portion of Detroit | |
| MINNESOTA (Region V) | |
| Duluth, MN (Moderate <= 12.7ppm) | |
| St Louis Co (P) | |
| City of Duluth | |
| Minneapolis-St Paul, MN (Moderate <= 12.7ppm) | |
| Anoka Co | |
| Carver Co (P) | |
| Dakota Co (P) | |
| Hennepin Co | |
| Ramsey Co | |
| Scott Co (P) | |
| Washington Co (P) | |
| All cities and townships except Denmark Township. | |
| Wright Co (P) | |
| MISSOURI (Region VII) | |
| St Louis, MO (Not Classified) | |
| St Louis | |
| St Louis Co (P) | |
| The area encompassed by the I-270 and the Mississippi River. | |
| MONTANA (Region VIII) | |
| Billings, MT (Not Classified) | |
| Yellowstone Co (P) | |
| Certain ranges and townships | |
| Great Falls, MT (Not Classified) | |
| Cascade Co (P) | |
| Missoula, MT (Moderate <= 12.7ppm) | |
| Missoula Co (P) | |
| NEVADA (Region IX) | |
| Lake Tahoe, NV (Not Classified) | |
| Carson City (P) | |
| Hydrographic Area 90 | |
| Douglas Co (P) | |
| Hydrographic Area 90 | |
| Washoe Co (P) | |
| Hydrographic Area 90 | |
| Las Vegas, NV (Serious) | |
| Clark Co (P) | |
| Las Vegas Valley Hydrographic Area 212 | |
| Reno, NV (Moderate <= 12.7ppm) | |
| Washoe Co (P) | |
| Truckee Meadows Hydrographic Area 87 | |
| NEW HAMPSHIRE (Region I) | |
| Manchester, NH (Not Classified) | |
| Hillsborough Co (P) | |
| City of Manchester | |
| Nashua, NH (Not Classified) | |
| Hillsborough Co (P) | |
| City of Nashua | |
| NEW JERSEY (Region II) | |
| Atlantic City, NJ (Not Classified) | |
| Atlantic Co (P) | |
| The City of Atlantic City | |
| Burlington, NJ (Not Classified) | |
| Burlington Co (P) | |
| City of Burlington | |
| Freehold, NJ (Not Classified) | |
| Monmouth Co (P) | |
| Borough of Freehold | |
| Morristown, NJ (Not Classified) | |
| Morris Co (P) | |
| City of Morristown | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate > 12.7ppm) | |
| Bergen Co | |
| Essex Co | |
| Hudson Co | |
| Passaic Co (P) | |
| City of Clifton, City of Patterson, City of Passaic | |
| Union Co | |
| Penns Grove, NJ (Not Classified) | |
| Salem Co (P) | |
| Perth Amboy, NJ (Not Classified) | |
| Middlesex Co (P) | |
| City of Perth Amboy | |
| Philadelphia-Camden Co, PA-NJ (Moderate <= 12.7ppm) | |
| Camden Co | |
| Somerville, NJ (Not Classified) | |
| Somerset Co (P) | |
| Borough of Somerville | |
| Toms River, NJ (Not Classified) | |
| Ocean Co (P) | |
| City of Toms River | |
| Trenton, NJ (Not Classified) | |
| Mercer Co (P) | |
| City of Trenton | |
| NEW MEXICO (Region VI) | |
| Albuquerque, NM (Moderate <= 12.7ppm) | |
| Bernalillo Co | |
| NEW YORK (Region II) | |
| New York-N. New Jersey-Long Island, NY-NJ-CT (Moderate > 12.7ppm) | |
| Bronx Co | |
| Kings Co | |
| Nassau Co | |
| New York Co | |
| Queens Co | |
| Richmond Co | |
| Westchester Co | |
| Syracuse, NY (Moderate <= 12.7ppm) | |
| Onondaga Co | |
| NORTH CAROLINA (Region IV) | |
| Charlotte, NC (Not Classified) | |
| Mecklenburg Co | |
| Raleigh-Durham, NC (Moderate <= 12.7ppm) | |
| Durham Co | |
| Wake Co | |
| Winston-Salem, NC (Moderate <= 12.7ppm) | |
| Forsyth Co | |
| OHIO (Region V) | |
| Cleveland, OH (Moderate <= 12.7ppm) | |
| Cuyahoga Co | |
| OREGON (Region X) | |
| Eugene-Springfield, OR (Not Classified) | |
| Lane Co (P) | |
| Air Quality Maintenance Area | |
| Grants Pass, OR (Moderate <= 12.7ppm) | |
| Josephine Co (P) | |
| Central Business District | |
| Klamath Falls, OR (Moderate <= 12.7ppm) | |
| Klamath Co (P) | |
| Urban Growth Boundary | |
| Medford, OR (Moderate <= 12.7ppm) | |
| Jackson Co (P) | |
| Medford-Ashland Urban Growth Boundary | |
| Portland, OR (Moderate <= 12.7ppm) | |
| Clackamas Co (P) | |
| Portland Metro Service District Boundary | |
| Multnomah Co (P) | |
| Portland Metro Service District Boundary | |
| Washington Co (P) | |
| Portland Metro Service District Boundary | |
| Salem, OR (Not Classified) | |
| Marion Co (P) | |
| City of Salem | |
| Polk Co (P) | |
| City of Salem | |
| PENNSYLVANIA (Region III) | |
| Philadelphia-Camden Co, PA-NJ (Moderate <= 12.7ppm) | |
| Philadelphia Co (P) | |
| Pittsburgh, PA (Not Classified) | |
| Allegheny Co (P) | |
| TENNESSEE (Region IV) | |
| Memphis, TN (Moderate <= 12.7ppm) | |
| Shelby Co | |
| TEXAS (Region VI) | |
| El Paso, TX (Moderate <= 12.7ppm) | |
| El Paso Co (P) | |
| Portion of the City Limits of El Paso | |
| UTAH (Region VIII) | |
| Ogden, UT (Moderate <= 12.7ppm) | |
| Weber Co (P) | |
| City of Ogden | |
| Provo, UT (Moderate > 12.7ppm) | |
| Utah Co (P) | |
| City of Provo | |
| Salt Lake City, UT (Not Classified) | |
| Salt Lake Co (P) | |
| Salt Lake City | |
| VIRGINIA (Region III) | |
| Washington, DC-MD-VA (Moderate <= 12.7ppm) | |
| Alexandria | |
| Arlington Co | |
| WASHINGTON (Region X) | |
| Seattle-Tacoma, WA (Moderate > 12.7ppm) | |
| King Co (P) | |
| Pierce Co (P) | |
| Snohomish Co (P) | |
| Spokane, WA (Serious) | |
| Spokane Co (P) | |
| Vancouver, WA (Moderate <= 12.7ppm) | |
| Clark Co (P) | |
| Yakima, WA (Not Classified) | |
| Yakima Co (P) | |
| Portion of the Central Business District | |
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