U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 52Subpart BBB - Subpart BBB—Puerto Rico
§ 52.2720 - Identification of plan.
§ 52.2721 - Classification of regions.
§ 52.2722 - Approval status.
§ 52.2723 - EPA-approved Puerto Rico regulations and laws.
§ 52.2724 - [Reserved]
§ 52.2725 - General requirements.
§ 52.2726 - Legal authority.
§ 52.2727 - Control strategy and regulations: Lead.
§ 52.2728 - [Reserved]
§ 52.2729 - Significant deterioration of air quality.
§ 52.2730 - Section 110(a)(2) infrastructure requirements.
§ 52.2731 - Control strategy and regulations: Sulfur oxides.
§ 52.2732 - Small business technical and environmental compliance assistance program.
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