Collapse to view only § 81.455 - Scope.
- § 81.455 - Scope.
- § 81.457 - Ozone Transport Region.
- APPENDIX Appendix A - Appendix A to Part 81—Air Quality Control Regions (AQCR's)
§ 81.455 - Scope.
This subpart identifies interstate transport regions established for national ambient air quality standards pursuant to section 184 or section 176A of the Clean Air Act.
§ 81.457 - Ozone Transport Region.
Except as provided in paragraph (a), the Ozone Transport Region is comprised of the areas identified by Congress under 42 U.S.C. 7511c(a).
(a) Ozone Transport Region boundary. As of March 14, 2022, the boundary for the Ozone Transport Region consists of the entire States of Connecticut, Delaware, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont; portions of Maine identified in this section under Table 1; and the Consolidated Metropolitan Statistical Area that includes the District of Columbia and the following counties and cities in Virginia: Arlington County, Fairfax County, Loudoun County, Prince William County, Strafford County, Alexandria City, Fairfax City, Falls Church City, Manassas City, and Manassas Park City.
Table 1 to Paragraph (
Maine towns and cities in the ozone transport region |
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(b) Applicability. As of March 14, 2022, the provisions of 42 U.S.C. 7511c will no longer be applicable in the following areas of Maine: The State of Maine, with the exception of the towns and cities listed in this section under table 1 to paragraph (a).
Appendix A - Appendix A to Part 81—Air Quality Control Regions (AQCR's)
AQCR No. | Alabama: | Alabama and Tombigbee Rivers | 1 | Columbus-Phenix City | 2 | East Alabama | 3 | Metropolitan Birmingham | 4 | Mobile-Pensacola-Panama City-Southern Mississippi (Fla., Miss.) | 5 | Southeast Alabama | 6 | Tennessee River Valley-Cumberland Mountains (Tenn.) | 7 | Alaska: | Cook Inlet | 8 | Northern Alaska | 9 | South Central Alaska | 10 | Southeastern Alaska | 11 | Arizona: | Arizona-New Mexico Southern Border (N. Mex.) | 12 | Clark-Mohave | 13 | Four Corners (Colo., N. Mex., Utah) | 14 | Phoenix-Tucson | 15 | Arkansas: | Central Arkansas | 16 | Metropolitan Fort Smith | 17 | Metropolitan Memphis | 18 | Monroe-El Dorado (La.) | 19 | Northeast Arkansas | 20 | Northwest Arkansas | 21 | Shreveport-Texarkana-Tyler (La., Okla., Texas) | 22 | California: | Great Basin Valley | 23 | Metropolitan Los Angeles | 24 | North Central Coast | 25 | North Coast | 26 | Northeast Plateau | 27 | Sacramento Valley | 28 | San Diego | 29 | San Francisco Bay Area | 30 | San Joaquin Valley | 31 | South Central Coast | 32 | Southeast Desert | 33 | Colorado: | Comanche | 34 | Four Corners (Ariz., N. Mex., Utah) | 14 | Grand Mesa | 35 | Metropolitan Denver | 36 | Pawnee | 37 | San Isabel | 38 | San Luis | 39 | Yampa | 40 | Connecticut: | Eastern Connecticut | 41 | Hartford-New Haven-Springfield (Mass.) | 42 | New Jersey-New York-Connecticut (N.J., N.Y.) | 43 | Northwestern Connecticut | 44 | Delaware: | Metropolitan Philadelphia (N.J., Pa.) | 45 | Southern Delaware | 46 | District of Columbia: | National Capital (Md.) | 47 | Florida: | Central Florida | 48 | Jacksonville-Brunswick (Ga.) | 49 | Mobile-Pensacola-Panama City-Southern Mississippi (Ala., Miss.) | 5 | Southeast Florida | 50 | Southwest Florida | 51 | West Central Florida | 52 | Georgia: | Augusta-Aiken (S.C.) | 53 | Central Georgia | 54 | Chattanooga (Tenn.) | 55 | Columbus-Phenix City (Ala.) | 2 | Jacksonville-Brunswick (Fla.) | 49 | Metropolitan Atlanta | 56 | Northeast Georgia | 57 | Savannah-Beaufort (S.C.) | 58 | Southwest Georgia | 59 | Hawaii: | Entire State | 60 | Idaho: | Eastern Idaho | 61 | Eastern Washington-Northern Idaho (Wash.) | 62 | Idaho | 63 | Metropolitan Boise | 64 | Illinois: | Burlington-Keokuk (Iowa) | 65 | East Central Illinois | 66 | Metropolitan Chicago (Ind.) | 67 | Metropolitan Dubuque (Iowa, Wis.) | 68 | Metropolitan Quad Cities (Iowa) | 69 | Metropolitan St. Louis (Mo.) | 70 | North Central Illinois | 71 | Paducah-Cairo (Ky.) | 72 | Rockford-Janesville-Beloit (Wis.) | 73 | Southeast Illinois | 74 | West Central Illinois | 75 | Indiana: | East Central Indiana | 76 | Evansville-Owensboro-Henderson (Ky.) | 77 | Louisville (Ky.) | 78 | Metropolitan Chicago (Ill.) | 67 | Metropolitan Cincinnati (Ky., Ohio) | 79 | Metropolitan Indianapolis | 80 | Northeast Indiana | 81 | South Bend-Elkhart-Benton Harbor (Mich.) | 82 | Southern Indiana | 83 | Wabash Valley | 84 | Iowa: | Burlington-Keokuk (Ill.) | 65 | Metropolitan Dubuque (Ill., Wis.) | 68 | Metropolitan Omaha-Council Bluffs (Nebr.) | 85 | Metropolitan Quad Cities (Ill.) | 69 | Metropolitan Sioux City (Nebr., S. Dak.) | 86 | Metropolitan Sioux Falls (S. Dak.) | 87 | Northeast Iowa | 88 | North Central Iowa | 89 | Northwest Iowa | 90 | Southeast Iowa | 91 | South Central Iowa | 92 | Southwest Iowa | 93 | Kansas: | Metropolitan Kansas City (Mo.) | 94 | Northeast Kansas | 95 | North Central Kansas | 96 | Northwest Kansas | 97 | Southeast Kansas | 98 | South Central Kansas | 99 | Southwest Kansas | 100 | Kentucky: | Appalachian | 101 | Bluegrass | 102 | Evansville-Owensboro-Henderson (Ind.) | 77 | Huntington-Ashland-Portsmouth-Ironton (Ohio, W. Va.) | 103 | Louisville (Ind.) | 78 | Metropolitan Cincinnati (Ind., Ohio) | 79 | North Central Kentucky | 104 | Paducah-Cairo (Ill.) | 72 | South Central Kentucky | 105 | Louisiana: | Monroe-El Dorado (Ark.) | 19 | Shreveport-Texarkana-Tyler (Ark., Okla., Tex.) | 22 | Southern Louisiana-Southeast Texas (Tex.) | 106 | Maine: | Androscoggin Valley (N.H.) | 107 | Aroostook | 108 | Down East | 109 | Metropolitan Portland | 110 | Northwest Maine | 111 | Maryland: | Central Maryland | 112 | Cumberland-Keyser (W. Va.) | 113 | Eastern Shore | 114 | Metropolitan Baltimore | 115 | National Capital (D.C.) | 47 | Southern Maryland | 116 | Massachusetts: | Berkshire | 117 | Central Massachusetts | 118 | Hartford-New Haven-Springfield (Conn.) | 42 | Metropolitan Boston | 119 | Metropolitan Providence (R.I.) | 120 | Merrimack Valley-Southern New Hampshire (N.H.) | 121 | Michigan: | Central Michigan | 122 | Metropolitan Detroit-Port Huron | 123 | Metropolitan Toledo (Ohio) | 124 | South Bend-Elkhart-Benton Harbor (Ind.) | 82 | South Central Michigan | 125 | Upper Michigan | 126 | Minnesota: | Central Minnesota | 127 | Southeast Minnesota-La Crosse (Wis.) | 128 | Duluth-Superior (Wis.) | 129 | Metropolitan Fargo-Moorhead (N. Dak.) | 130 | Minneapolis-St. Paul | 131 | Northwest Minnesota | 132 | Southwest Minnesota | 133 | Mississippi: | Metropolitan Memphis (Ark., Tenn.) | 18 | Mississippi Delta | 134 | Mobile-Pensacola-Panama City-Southern Mississippi (Ala., Fla.) | 5 | Northeast Mississippi | 135 | Missouri: | Metropolitan Kansas City (Kans.) | 94 | Metropolitan St. Louis (Ill.) | 70 | Northern Missouri | 137 | Southeast Missouri | 138 | Southwest Missouri | 139 | Montana: | Billings | 140 | Great Falls | 141 | Helena | 142 | Miles City | 143 | Missoula | 144 | Nebraska: | Lincoln-Beatrice-Fairbury | 145 | Metropolitan Omaha-Council Bluffs (Iowa) | 85 | Metropolitan Sioux City (Iowa, S. Dak.) | 86 | Nebraska | 146 | Nevada: | Clark-Mohave (Ariz.) | 13 | Nevada | 147 | Northwest Nevada | 148 | New Hampshire: | Androscoggin Valley (Maine) | 107 | Merrimack Valley-Southern New Hampshire (Mass.) | 121 | New Hampshire | 149 | New Jersey: | Metropolitan Philadelphia (Del., Pa.) | 45 | New Jersey | 150 | New Jersey-New York-Connecticut (N.Y., Conn.) | 43 | Northeast Pennsylvania-Upper Delaware Valley (Pa.) | 151 | New Mexico: | Albuquerque-Mid Rio Grande | 152 | Arizona-New Mexico Southern Border (Ariz.) | 12 | El Paso-Las Cruces-Alamogordo (Tex.) | 153 | Four Corners (Ariz., Colo., Utah) | 14 | Northeastern Plains | 154 | Pecos-Permian Basin | 155 | Southwestern Mountains-Augustine Plains | 156 | Upper Rio Grande Valley | 157 | New York: | Central New York | 158 | Champlain Valley (Vt.) | 159 | Genesee-Finger Lakes | 160 | Hudson Valley | 161 | New Jersey-New York-Connecticut (N.J., Conn.) | 43 | Niagara Frontier | 162 | Southern Tier East | 163 | Southern Tier West | 164 | North Carolina: | Eastern Mountain | 165 | Eastern Piedmont | 166 | Metropolitan Charlotte (S.C.) | 167 | Northern Coastal Plain | 168 | Northern Piedmont | 136 | Sandhills | 169 | Southern Coastal Plain | 170 | Western Mountain | 171 | North Dakota: | Metropolitan Fargo-Moorhead (Minn.) | 130 | North Dakota | 172 | Ohio: | Dayton | 173 | Greater Metropolitan Cleveland | 174 | Huntington-Ashland-Portsmouth-Ironton (Ky., W. Va.) | 103 | Mansfield-Marion | 175 | Metropolitan Cincinnati (Ind., Ky.) | 79 | Metropolitan Columbus | 176 | Metropolitan Toledo (Mich.) | 124 | Northwest Ohio | 177 | Northwest Pennsylvania-Youngstown (Pa.) | 178 | Parkersburg-Marietta (W. Va.) | 179 | Sandusky | 180 | Steubenville-Weirton-Wheeling (W. Va.) | 181 | Wilmington-Chillicothe-Logan | 182 | Zanesville-Cambridge | 183 | Oklahoma: | Central Oklahoma | 184 | Metropolitan Fort Smith (Ark.) | 17 | North Central Oklahoma | 185 | Northeastern Oklahoma | 186 | Northwestern Oklahoma | 187 | Shreveport-Texarkana-Tyler (Ark., La., Texas) | 22 | Southeastern Oklahoma | 188 | Southwestern Oklahoma | 189 | Oregon: | Central Oregon | 190 | Eastern Oregon | 191 | Northwest Oregon | 192 | Portland (Wash.) | 193 | Southwest Oregon | 194 | Pennsylvania: | Central Pennsylvania | 195 | Metropolitan Philadelphia (Del., N.J.) | 45 | Northeast Pennsylvania-Upper Delaware Valley (N.J.) | 151 | Northwest Pennsylvania-Youngstown (Ohio) | 178 | South Central Pennsylvania | 196 | Southwest Pennsylvania | 197 | Rhode Island: | Metropolitan Providence (Mass.) | 120 | South Carolina: | Augusta-Aiken (Ga.) | 53 | Camden-Sumter | 198 | Charleston | 199 | Columbia | 200 | Florence | 201 | Greenville-Spartanburg | 202 | Greenwood | 203 | Georgetown | 204 | Metropolitan Charlotte (N.C.) | 167 | Savannah-Beaufort (Ga.) | 58 | South Dakota: | Black Hills-Rapid City | 205 | Metropolitan Sioux City (Iowa, Neb.) | 86 | Metropolitan Sioux Falls (Iowa) | 87 | South Dakota | 206 | Tennessee: | Chattanooga (Ga.) | 55 | Eastern Tennessee-Southwestern Virginia (Va.) | 207 | Metropolitan Memphis (Ark., Miss.) | 18 | Middle Tennessee | 208 | Tennessee River Valley-Cumberland Mountains (Ala.) | 7 | Western Tennessee | 209 | Texas: | Abilene-Wichita Falls | 210 | Amarillo-Lubbock | 211 | Austin-Waco | 212 | Brownsville-Laredo | 213 | Corpus Christi-Victoria | 214 | El Paso-Las Cruces-Alamagordo (N. Mex.) | 153 | Metropolitan Dallas-Ft. Worth | 215 | Metropolitan Houston-Galveston | 216 | Metropolitan San Antonio | 217 | Midland-Odessa-San Angelo | 218 | Shreveport-Texarkana-Tyler (Ark., La., Okla.) | 22 | Southern Louisiana-Southeast Texas (La.) | 106 | Utah: | Four Corners (Ariz., Colo., N. Mex.) | 14 | Utah | 219 | Wasatch Front | 220 | Vermont: | Champlain Valley (N.Y.) | 159 | Vermont | 221 | Virginia: | Central Virginia | 222 | Eastern Tennessee-Southwestern Virginia (Tenn.) | 207 | Hampton Roads | 223 | National Capital (D.C., Md.) | 47 | Northeastern Virginia | 224 | State Capital | 225 | Valley of Virginia | 226 | Washington: | Eastern Washington-Northern Idaho (Idaho) | 62 | Northern Washington | 227 | Olympia-Northwest Washington | 228 | Portland (Ore.) | 193 | Puget Sound | 229 | South Central Washington | 230 | West Virginia: | Allegheny | 231 | Central West Virginia | 232 | Cumberland-Keyser (Md.) | 113 | Eastern Panhandle | 233 | Huntington-Ashland-Portsmouth-Iron- ton (Ky., Ohio) | 103 | Kanawha Valley | 234 | North Central West Virginia | 235 | Parkersburg-Marietta (Ohio) | 179 | Southern West Virginia | 236 | Steubenville-Wierton-Wheeling (Ohio) | 181 | Wisconsin: | Duluth-Superior (Minn.) | 129 | Lake Michigan | 237 | Metropolitan Dubuque (Ill., Iowa) | 68 | North Central Wisconsin | 238 | Rockford- Janesville- Beloit (Ill.) | 73 | Southeastern Wisconsin | 239 | Southeast Minnesota- La Crosse (Minn.) | 128 | Southern Wisconsin | 240 | Wyoming: | Casper | 241 | Metropolitan Cheyenne | 242 | Wyoming | 243 | Puerto Rico: | Puerto Rico | 244 | American Samoa: | American Samoa | 245 | Guam: | Guam | 246 | U.S. Virgin Islands: | U.S. Virgin Islands | 247 |
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