Title 42 › CHAPTER 85 — AIR POLLUTION PREVENTION AND CONTROL › SUBCHAPTER I — PROGRAMS AND ACTIVITIES › Part C — Prevention of Significant Deterioration of Air Quality › subpart i — clean air › § 7474
States can change the air-quality classification of areas they control. Areas over 10,000 acres that are national monuments, primitive areas, preserves, recreation areas, wild and scenic rivers, wildlife refuges, or national lakeshores/seashores, and national parks or wilderness areas set up after August 7, 1977 that are over 10,000 acres, can only be made class I or II. Boundary lines must follow any changes made after August 7, 1977 or after November 15, 1990. A State may make other areas class III only if the Governor approves after consulting the legislature (or state law requires the legislature to approve), local governments covering a majority of residents agree, the change won’t cause air pollution limits to be exceeded in other areas, and the change meets the rest of the rules. That Governor-approval rule does not apply when an Indian tribe is redesignating land inside its reservation. Before any redesignation there must be public notice and hearings, and a written review of health, environmental, economic, social, and energy effects must be made available. If federal land is involved, the State must notify the federal land manager and give them up to 60 days to talk and file written comments; the State must publish any differences between its choice and the federal land manager’s advice and explain why. The EPA Administrator had to issue rules within six months after August 7, 1977 to make plans for any big pollution sources available before hearings. The EPA Administrator can reject a redesignation if the procedures aren’t followed or if it conflicts with other rules; if rejected, the area stays in its old class. The federal land manager must review certain federal areas and report any class I recommendations to Congress and the states within one year after August 7, 1977. If a State and a tribe disagree about a redesignation or a new major pollution source, either can ask the EPA Administrator to negotiate; the Administrator can recommend a solution and, if needed, make a final decision that becomes part of the enforceable plan.
Full Legal Text
The Public Health and Welfare, Source: USLM XML via OLRC
Legislative History
Reference
Citation
42 U.S.C. § 7474
Title 42, The Public Health and Welfare
Last Updated
Sep 23, 2026
Release point: 119-110