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Code · CFR · Title 40 — Protection of Environment · Part 52 · § 52.1121

§ 52.1121. Classification of regions.

72 words·~1 min read·/us/cfr/t40/s§ 52.1121·

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The Massachusetts plan was evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone Metropolitan Boston IntrastateIIIIIII Merrimack Valley-Southern New Hampshire InterstateIIIIIIIIIII Metropolitan Providence InterstateIIIIIIIIIII Central Massachusetts IntrastateIIIIIIIIIIII Hartford-New Haven-Springfield InterstateIIIIIII Berkshire IntrastateIIIIIIIIIIIIII [37 FR 10872, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 61303, Sept. 16, 1980; 84 FR 29383, June 24, 2019]
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§ 52.1121
Classification of regions.
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