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U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 147Subpart G - Subpart G—Colorado
§ 147.300 - State-administered program—Class II wells.
§ 147.301 - EPA-administered program—Class I, III, IV, V wells and Indian lands.
§ 147.302 - Aquifer exemptions.
§ 147.303 - Existing Class I, II (except enhanced recovery and hydrocarbon storage) and III wells authorized by rule.
§ 147.304 - Existing Class II enhanced recovery and hydrocarbon storage wells authorized by rule.
§ 147.305 - Requirements for all wells.
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