Regulatory Text
40 C.F.R. § 52.2721 — Classification of regions.
§ 52.2721 Classification of regions. The Puerto Rico plan was evaluated on the basis of the following classifications. Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons) Puerto Rico IA IA III III III [37 FR 10905, May 31, 1972]
Source: ecfr.gov · govinfo.gov — public domain
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BS-CFR40-SEC-A50C83
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Citation
40 C.F.R. § 52.2721
Corpus
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The regulatory text of 40 C.F.R. § 52.2721 is reproduced from the official Code of Federal Regulations as published by the Office of the Federal Register and the National Archives and Records Administration.
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Title 40 — Protection of Environment
40 C.F.R. § 1.140 C.F.R. § 1.340 C.F.R. § 1.540 C.F.R. § 1.740 C.F.R. § 1.2140 C.F.R. § 1.2340 C.F.R. § 1.2540 C.F.R. § 1.2740 C.F.R. § 1.2940 C.F.R. § 1.3140 C.F.R. § 1.3340 C.F.R. § 1.3540 C.F.R. § 1.3740 C.F.R. § 1.3940 C.F.R. § 1.4140 C.F.R. § 1.4340 C.F.R. § 1.4540 C.F.R. § 1.4740 C.F.R. § 1.4940 C.F.R. § 1.6140 C.F.R. § 2.10040 C.F.R. § 2.10140 C.F.R. § 2.10240 C.F.R. § 2.10340 C.F.R. § 2.10440 C.F.R. § 2.10540 C.F.R. § 2.10640 C.F.R. § 2.10740 C.F.R. § 2.10840 C.F.R. § 2.201
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