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Nitrogen Dioxide Designations

State Designations

On January 20, 2012 EPA designated all areas of the country as “unclassifiable/attainment” for the 2010 NO2 NAAQS. The available air quality data show that all monitored areas in the country meet the 2010 NO2 NAAQS for 2008-2010. No state or tribe recommended an area be designated “nonattainment.”

State information is presented below.

Tribal information is available on the Tribal Recommendations page.

The following map groups the states by their associated EPA regional office.  Click on a region in the map or list below to view recommendations submitted to EPA by the states or tribes within that region.

Map of the US, split into EPA regions Region 1: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont Region 2: New Jersey, New York, Puerto Rico, US Virgin Islands Region 3: Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, West Virginia Region 4: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, Wisconsin Region 6: Arkansas, Louisiana, New Mexico, Oklahoma, Texas Region 7: Iowa, Kansas, Missouri, Nebraska Region 8: Colorado, Montana, North Dakota, South Dakaota, Utah, Wyoming Region 9: Arizona, California, Hawaii, Nevada, Pacific Islands Region 10: Alaska, Idaho, Oregon, Washington

Region 1: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont and Tribal Nations

Region 2: New Jersey, New York, Puerto Rico, US Virgin Islands and Tribal Nations

Region 3: Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, and West Virginia

Region 4: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee and Tribal Nations

Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, Wisconsin and Tribal Nations

Region 6: Louisiana, Arkansas, Oklahoma, New Mexico, Texas and Tribal Nations


Region 7: Iowa, Kansas, Missouri, Nebraska, and Tribal Nations

Region 8: Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming and Tribal Nations


Region 9: Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations

Region 10: Alaska, Idaho, Oregon, Washington and Tribal Nations

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