40 CFR Subpart B
Designation of Air Quality Control Regions
June 9, 2020
§
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
§
81.71
Rockford (Illinois)-Janesville-Beloit (Wisconsin) 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
§
81.84
Metropolitan Fargo-Moorhead 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
§
81.85
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
§
81.219
Central Oregon 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
§
81.190
Eastern Idaho 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
§
81.191
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
§
81.220
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
§
81.258
Northwest Iowa 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
§
81.259
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
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