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Code · CFR · Title 40 — Protection of Environment · Part 52 · § 52.721

§ 52.721. Classification of regions.

88 words·~1 min read·/us/cfr/t40/s§ 52.721·

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The Illinois plan was evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone Burlington-Keokuk InterstateIIIIIIIIIII East Central Illinois IntrastateIIIIIIIIIIIIII Metropolitan Chicago Interstate (Indiana-Illinois)IIIII Metropolitan Dubuque InterstateIIIIIIIIIIIII Metropolitan Quad Cities InterstateIIIIIIIIIIIII Metropolitan St. Louis Interstate (Missouri-Illinois)IIIIIII North Central Illinois IntrastateIIIAIIIIIIIII Paducah (Kentucky)-Cairo (Illinois) InterstateIIIIIIIIIIII Rockford (Illinois)-Janesville-Beloit (Wisconsin) InterstateIIIIIIIIIIIIII Southeast Illinois IntrastateIIIIIIIIIIIIII West Central Illinois IntrastateIIAIIIIIIIII [37 FR 10862, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 11493, Feb. 21, 1980]
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