U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 30, 2025

All TitlesTitle 40Chapter IPart 52Subpart MM - Subpart MM—Oregon
§ 52.1970 - Identification of plan.
§ 52.1971 - Classification of regions.
§ 52.1972 - Approval status.
§ 52.1973 - [Reserved]
§ 52.1974 - Original identification of plan section.
§§ 52.1975-52.1986 - §[Reserved]
§ 52.1987 - Significant deterioration of air quality.
§ 52.1988 - Air contaminant discharge permits.
§§ 52.1989-52.2019 - §[Reserved]
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