U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 40Chapter IPart 52Subpart G - Subpart G—Colorado
§ 52.319 - Conditional approval.
§ 52.320 - Identification of plan.
§ 52.321 - Classification of regions.
§ 52.322 - Extensions.
§ 52.323 - Approval status.
§ 52.324 - Legal authority.
§ 52.325 - [Reserved]
§ 52.326 - Area-wide nitrogen oxides (NOX) exemptions.
§§ 52.327-52.328 - §[Reserved]
§ 52.329 - Rules and regulations.
§ 52.330 - Control strategy: Total suspended particulates.
§ 52.331 - Committal SIP for the Colorado Group II PM10. areas.
§ 52.332 - Control strategy: Particulate matter.
§§ 52.333-52.342 - §[Reserved]
§ 52.343 - Significant deterioration of air quality.
§ 52.344 - Visibility protection.
§ 52.345 - Stack height regulations.
§ 52.346 - Air quality monitoring requirements.
§ 52.347 - [Reserved]
§ 52.348 - Emission inventories.
§ 52.349 - Control strategy: Carbon monoxide.
§ 52.350 - Control strategy: Ozone.
§ 52.351 - United States Postal Service substitute Clean Fuel Fleet Program.
§ 52.352 - Interstate transport.
§ 52.353 - Section 110(a)(2) infrastructure requirements.
§ 52.354 - Original identification of plan.
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