Sulfur Dioxide (1971) Maintenance Areas (Redesignated from Nonattainment)
Data is current as of June 20, 2017
Grouped by Designation
| PRIMARY |
| Ajo (Pima County), AZ |
| Boyd County (part), KY |
| Central Steptoe Valley (White Pine Co.), NV |
| Conewango Township (Warren County), PA |
| Cuyahoga Co, OH |
| Douglas (Cochise County), AZ |
| Franklin Township (Coshocton County), OH |
| Grant Co, NM |
| Green Bay, WI |
| Groveland Township (Tazewell County), IL |
| Hazelwood, PA |
| La Porte Co, IN |
| Lake Co, OH |
| Lake County, IN |
| Lorain Co, OH |
| Lucas Co, OH |
| Madison, WI |
| Marion County: Lawrence, Washington, and Warrant Townships, IN |
| Miami (Gila County), AZ |
| Millinocket AQCR 109, ME |
| Milwaukee, WI |
| Minneapolis-St Paul, MN |
| Morenci (Greenlee County), AZ |
| Muscatine Co, IA |
| New Manchester-Grant Mag. Dis (Hancock), WV |
| Peoria, IL |
| Rochester (Olmsted County), MN |
| San Manual (Pinal County), AZ |
| Steubenville & Mingo Juction, OH |
| Vigo Co, IN |
| Wayne Co, IN |
| |
| PRIMARY, SECONDARY |
| Benton Co, TN |
| Hollis Township, IL |
| Humphreys Co, TN |
| Polk Co, TN |
| Rhinelander (Oneida County), WI |
| Rothschild,Rib Mtn,Weston (Marathon Co), WI |
| Warren Co, PA |
| Weirton, WV |
| |
| SECONDARY |
| Addison Township (Gallia County), OH |
| Center Township (Morgan County), OH |
| Colbert Co, AL |
| Lauderdale Co, AL |
| Muhlenberg Co, KY |
| Waterford Township (Washington County), OH |
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