Part 81 — Designation of Areas for Air Quality Planning Purposes
Subpart A — Meaning of Terms
Subpart B — Designation of Air Quality Control Regions
- § 81.11— Scope.
- § 81.12— National Capital Interstate Air Quality Control Region (District of Columbia, Maryland, and Virginia).
- § 81.13— New Jersey-New York-Connecticut Interstate Air Quality Control Region.
- § 81.14— Metropolitan Chicago Interstate Air Quality Control Region.
- § 81.15— Metropolitan Philadelphia Interstate Air Quality Control Region (Pennsylvania-New Jersey-Delaware).
- § 81.16— Metropolitan Denver Intrastate Air Quality Control Region.
- § 81.17— Metropolitan Los Angeles Air Quality Control Region.
- § 81.18— Metropolitan St. Louis Interstate Air Quality Control Region.
- § 81.19— Metropolitan Boston Intrastate Air Quality Control Region.
- § 81.20— Metropolitan Cincinnati Interstate Air Quality Control Region.
- § 81.21— San Francisco Bay Area Intrastate Air Quality Control Region.
- § 81.22— Greater Metropolitan Cleveland Intrastate Air Quality Control Region.
- § 81.23— Southwest Pennsylvania Intrastate Air Quality Control Region.
- § 81.24— Niagara Frontier Intrastate Air Quality Control Region.
- § 81.25— Metropolitan Kansas City Interstate Air Quality Control Region.
- § 81.26— Hartford-New Haven-Springfield Interstate Air Quality Control Region.
- § 81.27— Minneapolis-St. Paul Intrastate Air Quality Control Region.
- § 81.28— Metropolitan Baltimore Intrastate Air Quality Control Region.
- § 81.29— Metropolitan Indianapolis Intrastate Air Quality Control Region.
- § 81.30— Southeastern Wisconsin Intrastate Air Quality Control Region.
- § 81.31— Metropolitan Providence Interstate Air Quality Control Region.
- § 81.32— Puget Sound Intrastate Air Quality Control Region.
- § 81.33— Steubenville-Weirton-Wheeling Interstate Air Quality Control Region.
- § 81.34— Metropolitan Dayton Intrastate Air Quality Control Region.
- § 81.35— Louisville Interstate Air Quality Control Region.
- § 81.36— Maricopa Intrastate Air Quality Control Region.
- § 81.37— Metropolitan Detroit-Port Huron Intrastate Air Quality Control Region.
- § 81.38— Metropolitan Houston-Galveston Intrastate Air Quality Control Region.
- § 81.39— Metropolitan Dallas-Fort Worth Intrastate Air Quality Control Region.
- § 81.40— Metropolitan San Antonio Intrastate Air Quality Control Region.
- § 81.41— Metropolitan Birmingham Intrastate Air Quality Control Region.
- § 81.42— Chattanooga Interstate Air Quality Control Region.
- § 81.43— Metropolitan Toledo Interstate Air Quality Control Region.
- § 81.44— Metropolitan Memphis Interstate Air Quality Control Region.
- § 81.45— Metropolitan Atlanta Intrastate Air Quality Control Region.
- § 81.46— U.S. Virgin Islands Air Quality Control Region.
- § 81.47— Central Oklahoma Intrastate Air Quality Control Region.
- § 81.48— Champlain Valley Interstate Air Quality Control Region.
- § 81.49— Southeast Florida Intrastate Air Quality Control Region.
- § 81.50— Metropolitan Omaha-Council Bluffs Interstate Air Quality Control Region.
- § 81.51— Portland Interstate Air Quality Control Region.
- § 81.52— Wasatch Front Intrastate Air Quality Control Region.
- § 81.53— Southern Louisiana-Southeast Texas Interstate Air Quality Control Region.
- § 81.54— Cook Inlet Intrastate Air Quality Control Region.
- § 81.55— Northeast Pennsylvania-Upper Delaware Valley Interstate Air Quality Control Region.
- § 81.57— Eastern Tennessee-Southwestern Virginia Interstate Air Quality Control Region.
- § 81.58— Columbus (Georgia)-Phenix City (Alabama) Interstate Air Quality Control Region.
- § 81.59— Cumberland-Keyser Interstate Air Quality Control Region.
- § 81.60— Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region.
- § 81.61— Evansville (Indiana)-Owensboro-Henderson (Kentucky) Interstate Air Quality Control Region.
- § 81.62— Northeast Mississippi Intrastate Air Quality Control Region.
- § 81.63— Metropolitan Fort Smith Interstate Air Quality Control Region.
- § 81.64— Huntington (West Virginia)-Ashland (Kentucky)-Portsmouth-Ironton (Ohio) Interstate Air Quality Control Region.
- § 81.65— Joplin (Missouri)-Northeast Oklahoma Interstate Air Quality Control Region.
- § 81.66— Southeast Minnesota-La Crosse (Wisconsin) Interstate Air Quality Control Region.
- § 81.67— Lake Michigan Intrastate Air Quality Control Region.
- § 81.68— Mobile (Alabama)-Pensacola-Panama City (Florida)-Southern Mississippi Interstate Air Quality Control Region.
- § 81.69— Paducah (Kentucky)-Cairo (Illinois) Interstate Air Quality Control Region.
- § 81.70— Parkersburg (West Virginia)-Marietta (Ohio) Interstate Air Quality Control Region.
- § 81.71— Rockford (Illinois)-Janesville-Beloit (Wisconsin) Interstate Air Quality Control Region.
- § 81.72— Tennessee River Valley (Alabama)-Cumberland Mountains (Tennessee) Interstate Air Quality Control Region.
- § 81.73— South Bend-Elkhart (Indiana)-Benton Harbor (Michigan) Interstate Air Quality Control Region.
- § 81.74— Northwest Pennsylvania-Youngstown Interstate Air Quality Control Region.
- § 81.75— Metropolitan Charlotte Interstate Air Quality Control Region.
- § 81.76— State of Hawaii Air Quality Control Region.
- § 81.77— Puerto Rico Air Quality Control Region.
- § 81.78— Metropolitan Portland Intrastate Air Quality Control Region.
- § 81.79— Northeastern Oklahoma Intrastate Air Quality Control Region.
- § 81.80— Las Vegas Intrastate Air Quality Control Region.
- § 81.81— Merrimack Valley-Southern New Hampshire Interstate Air Quality Control Region.
- § 81.82— El Paso-Las Cruces-Alamogordo Interstate Air Quality Control Region.
- § 81.83— Albuquerque-Mid Rio Grande Intrastate Air Quality Control Region.
- § 81.84— Metropolitan Fargo-Moorhead Interstate Air Quality Control Region.
- § 81.85— Metropolitan Sioux Falls Interstate Air Quality Control Region.
- § 81.86— Metropolitan Sioux City Interstate Air Quality Control Region.
- § 81.87— Metropolitan Boise Intrastate Air Quality Control Region.
- § 81.88— Billings Intrastate Air Quality Control Region.
- § 81.89— Metropolitan Cheyenne Intrastate Air Quality Control Region.
- § 81.90— Androscoggin Valley Interstate Air Quality Control Region.
- § 81.91— Jacksonville (Florida)-Brunswick (Georgia) Interstate Air Quality Control Region.
- § 81.92— Monroe (Louisiana)—El Dorado (Arkansas) Interstate Air Quality Control Region.
- § 81.93— Hampton Roads Intrastate Air Quality Control Region.
- § 81.94— Shreveport-Texarkana-Tyler Interstate Air Quality Control Region.
- § 81.95— Central Florida Intrastate Air Quality Control Region.
- § 81.96— West Central Florida Intrastate Air Quality Control Region.
- § 81.97— Southwest Florida Intrastate Air Quality Control Region.
- § 81.98— Burlington-Keokuk Interstate Air Quality Control Region.
- § 81.99— New Mexico Southern Border Intrastate Air Quality Control Region.
- § 81.100— Eastern Washington-Northern Idaho Interstate Air Quality Control Region.
- § 81.101— Metropolitan Dubuque Interstate Air Quality Control Region.
- § 81.102— Metropolitan Quad Cities Interstate Air Quality Control Region.
- § 81.104— Central Pennsylvania Intrastate Air Quality Control Region.
- § 81.105— South Central Pennsylvania Intrastate Air Quality Control Region.
- § 81.106— Greenville-Spartanburg Intrastate Air Quality Control Region.
- § 81.107— Greenwood Intrastate Air Quality Control Region.
- § 81.108— Columbia Intrastate Air Quality Control Region.
- § 81.109— Florence Intrastate Air Quality Control Region.
- § 81.110— Camden-Sumter Intrastate Air Quality Control Region.
- § 81.111— Georgetown Intrastate Air Quality Control Region.
- § 81.112— Charleston Intrastate Air Quality Control Region.
- § 81.113— Savannah (Georgia)-Beaufort (South Carolina) Interstate Air Quality Control Region.
- § 81.114— Augusta (Georgia)-Aiken (South Carolina) Interstate Air Quality Control Region.
- § 81.115— Northwest Nevada Intrastate Air Quality Control Region.
- § 81.116— Northern Missouri Intrastate Air Quality Control Region.
- § 81.117— Southeast Missouri Intrastate Air Quality Control Region.
- § 81.118— Southwest Missouri Intrastate Air Quality Control Region.
- § 81.119— Western Tennessee Intrastate Air Quality Control Region.
- § 81.120— Middle Tennessee Intrastate Air Quality Control Region.
- § 81.121— Four Corners Interstate Air Quality Control Region.
- § 81.122— Mississippi Delta Intrastate Air Quality Control Region.
- § 81.123— Southeastern Oklahoma Intrastate Air Quality Control Region.
- § 81.124— North Central Oklahoma Intrastate Air Quality Control Region.
- § 81.125— Southwestern Oklahoma Intrastate Air Quality Control Region.
- § 81.126— Northwestern Oklahoma Intrastate Air Quality Control Region.
- § 81.127— Central New York Intrastate Air Quality Control Region.
- § 81.128— Genesee-Finger Lakes Intrastate Air Quality Control Region.
- § 81.129— Hudson Valley Intrastate Air Quality Control Region.
- § 81.130— Southern Tier East Intrastate Air Quality Control Region.
- § 81.131— Southern Tier West Intrastate Air Quality Control Region.
- § 81.132— Abilene-Wichita Falls Intrastate Air Quality Control Region.
- § 81.133— Amarillo-Lubbock Intrastate Air Quality Control Region.
- § 81.134— Austin-Waco Intrastate Air Quality Control Region.
- § 81.135— Brownsville-Laredo Intrastate Air Quality Control Region.
- § 81.136— Corpus Christi-Victoria Intrastate Air Quality Control Region.
- § 81.137— Midland-Odessa-San Angelo Intrastate Air Quality Control Region.
- § 81.138— Central Arkansas Intrastate Air Quality Control Region.
- § 81.139— Northeast Arkansas Intrastate Air Quality Control Region.
- § 81.140— Northwest Arkansas Intrastate Air Quality Control Region.
- § 81.141— Berkshire Intrastate Air Quality Control Region.
- § 81.142— Central Massachusetts Intrastate Air Quality Control Region.
- § 81.143— Central Virginia Intrastate Air Quality Control Region.
- § 81.144— Northeastern Virginia Intrastate Air Quality Control Region.
- § 81.145— State Capital Intrastate Air Quality Control Region.
- § 81.146— Valley of Virginia Intrastate Air Quality Control Region.
- § 81.147— Eastern Mountain Intrastate Air Quality Control Region.
- § 81.148— Eastern Piedmont Intrastate Air Quality Control Region.
- § 81.149— Northern Coastal Plain Intrastate Air Quality Control Region.
- § 81.150— Northern Piedmont Intrastate Air Quality Control Region.
- § 81.151— Sandhills Intrastate Air Quality Control Region.
- § 81.152— Southern Coastal Plain Intrastate Air Quality Control Region.
- § 81.153— Western Mountain Intrastate Air Quality Control Region.
- § 81.154— Eastern Shore Intrastate Air Quality Control Region.
- § 81.155— Central Maryland Intrastate Air Quality Control Region.
- § 81.156— Southern Maryland Intrastate Air Quality Control Region.
- § 81.157— North Central Wisconsin Intrastate Air Quality Control Region.
- § 81.158— Southern Wisconsin Intrastate Air Quality Control Region.
- § 81.159— Great Basin Valley Intrastate Air Quality Control Region.
- § 81.160— North Central Coast Intrastate Air Quality Control Region.
- § 81.161— North Coast Intrastate Air Quality Control Region.
- § 81.162— Northeast Plateau Intrastate Air Quality Control Region.
- § 81.163— Sacramento Valley Intrastate Air Quality Control Region.
- § 81.164— San Diego Intrastate Air Quality Control Region.
- § 81.165— San Joaquin Valley Intrastate Air Quality Control Region.
- § 81.166— South Central Coast Intrastate Air Quality Control Region.
- § 81.167— Southeast Desert Intrastate Air Quality Control Region.
- § 81.168— Great Falls Intrastate Air Quality Control Region.
- § 81.169— Helena Intrastate Air Quality Control Region.
- § 81.170— Miles City Intrastate Air Quality Control Region.
- § 81.171— Missoula Intrastate Air Quality Control Region.
- § 81.172— Comanche Intrastate Air Quality Control Region.
- § 81.173— Grand Mesa Intrastate Air Quality Control Region.
- § 81.174— Pawnee Intrastate Air Quality Control Region.
- § 81.175— San Isabel Intrastate Air Quality Control Region.
- § 81.176— San Luis Intrastate Air Quality Control Region.
- § 81.177— Yampa Intrastate Air Quality Control Region.
- § 81.178— Southern Delaware Intrastate Air Quality Control Region.
- § 81.179— Aroostook Intrastate Air Quality Control Region.
- § 81.181— Down East Intrastate Air Quality Control Region.
- § 81.182— Northwest Maine Intrastate Air Quality Control Region.
- § 81.183— Eastern Connecticut Intrastate Air Quality Control Region.
- § 81.184— Northwestern Connecticut Intrastate Air Quality Control Region.
- § 81.185— Northern Washington Intrastate Air Quality Control Region.
- § 81.187— Olympic-Northwest Washington Intrastate Air Quality Control Region.
- § 81.189— South Central Washington Intrastate Air Quality Control Region.
- § 81.190— Eastern Idaho Intrastate Air Quality Control Region.
- § 81.191— Appalachian Intrastate Air Quality Control Region.
- § 81.192— Bluegrass Intrastate Air Quality Control Region.
- § 81.193— North Central Kentucky Intrastate Air Quality Control Region.
- § 81.194— South Central Kentucky Intrastate Air Quality Control Region.
- § 81.195— Central Michigan Intrastate Air Quality Control Region.
- § 81.196— South Central Michigan Intrastate Air Quality Control Region.
- § 81.197— Upper Michigan Intrastate Air Quality Control Region.
- § 81.199— East Alabama Intrastate Air Quality Control Region.
- § 81.200— Metropolitan Columbus Intrastate Air Quality Control Region.
- § 81.201— Mansfield-Marion Intrastate Air Quality Control Region.
- § 81.202— Northwest Ohio Intrastate Air Quality Control Region.
- § 81.203— Sandusky Intrastate Air Quality Control Region.
- § 81.204— Wilmington-Chillicothe-Logan Intrastate Air Quality Control Region.
- § 81.205— Zanesville-Cambridge Intrastate Air Quality Control Region.
- § 81.213— Casper Intrastate Air Quality Control Region.
- § 81.214— Black Hills-Rapid City Intrastate Air Quality Control Region.
- § 81.215— East Central Indiana Intrastate Air Quality Control Region.
- § 81.216— Northeast Indiana Intrastate Air Quality Control Region.
- § 81.217— Southern Indiana Intrastate Air Quality Control Region.
- § 81.218— Wabash Valley Intrastate Air Quality Control Region.
- § 81.219— Central Oregon Intrastate Air Quality Control Region.
- § 81.220— Eastern Oregon Intrastate Air Quality Control Region.
- § 81.221— Southwest Oregon Intrastate Air Quality Control Region.
- § 81.226— Lincoln-Beatrice-Fairbury Intrastate Air Quality Control Region.
- § 81.230— Allegheny Intrastate Air Quality Control Region.
- § 81.231— Central West Virginia Intrastate Air Quality Control Region.
- § 81.232— Eastern Panhandle Intrastate Air Quality Control Region.
- § 81.233— Kanawha Valley Intrastate Air Quality Control Region.
- § 81.234— North Central West Virginia Intrastate Air Quality Control Region.
- § 81.235— Southern West Virginia Intrastate Air Quality Control Region.
- § 81.236— Central Georgia Intrastate Air Quality Control Region.
- § 81.237— Northeast Georgia Intrastate Air Quality Control Region.
- § 81.238— Southwest Georgia Intrastate Air Quality Control Region.
- § 81.239— Upper Rio Grande Valley Intrastate Air Quality Control Region.
- § 81.240— Northeastern Plains Intrastate Air Quality Control Region.
- § 81.241— Southwestern Mountains-Augustine Plains Intrastate Air Quality Control Region.
- § 81.242— Pecos-Permian Basin Intrastate Air Quality Control Region.
- § 81.243— Central Minnesota Intrastate Air Quality Control Region.
- § 81.244— Northwest Minnesota Intrastate Air Quality Control Region.
- § 81.245— Southwest Minnesota Intrastate Air Quality Control Region.
- § 81.246— Northern Alaska Intrastate Air Quality Control Region.
- § 81.247— South Central Alaska Intrastate Air Quality Control Region.
- § 81.248— Southeastern Alaska Intrastate Air Quality Control Region.
- § 81.249— Northwest Oregon Intrastate Air Quality Control Region.
- § 81.250— North Central Kansas Intrastate Air Quality Control Region.
- § 81.251— Northeast Kansas Intrastate Air Quality Control Region.
- § 81.252— Northwest Kansas Intrastate Air Quality Control Region.
- § 81.253— South Central Kansas Intrastate Air Quality Control Region.
- § 81.254— Southeast Kansas Intrastate Air Quality Control Region.
- § 81.255— Southwest Kansas Intrastate Air Quality Control Region.
- § 81.256— Northeast Iowa Intrastate Air Quality Control Region.
- § 81.257— North Central Iowa Intrastate Air Quality Control Region.
- § 81.258— Northwest Iowa Intrastate Air Quality Control Region.
- § 81.259— Southwest Iowa Intrastate Air Quality Control Region.
- § 81.260— South Central Iowa Intrastate Air Quality Control Region.
- § 81.261— Southeast Iowa Intrastate Air Quality Control Region.
- § 81.262— North Central Illinois Intrastate Air Quality Control Region.
- § 81.263— East Central Illinois Intrastate Air Quality Control Region.
- § 81.264— West Central Illinois Intrastate Air Quality Control Region.
- § 81.265— Southeast Illinois Intrastate Air Quality Control Region.
- § 81.266— Alabama and Tombigbee Rivers Intrastate Air Quality Control Region.
- § 81.267— Southeast Alabama Intrastate Air Quality Control Region.
- § 81.268— Mohave-Yuma Intrastate Air Quality Control Region.
- § 81.269— Pima Intrastate Air Quality Control Region.
- § 81.270— Northern Arizona Intrastate Air Quality Control Region.
- § 81.271— Central Arizona Intrastate Air Quality Control Region.
- § 81.272— Southeast Arizona Intrastate Air Quality Control Region.
- § 81.273— Lake County Intrastate Air Quality Control Region.
- § 81.274— Mountain Counties Intrastate Air Quality Control Region.
- § 81.275— Lake Tahoe Intrastate Air Quality Control Region.
- § 81.276— Nevada Intrastate Air Quality Control Region.