U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 40Chapter IPart 147Subpart NN - Subpart NN—Pennsylvania
§ 147.1950 - State-administered program. [Reserved]
§ 147.1951 - EPA-administered program.
§ 147.1952 - Aquifer exemptions.
§ 147.1953 - Existing Class I, II (except enhanced recovery and hydrocarbon storage) and III wells authorized by rule.
§ 147.1954 - Existing Class II enhanced recovery and hydrocarbon storage wells authorized by rule.
§ 147.1955 - Requirements for wells authorized by permit.
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