Classification of regions.

§ 52.1171 Classification of regions.

The Michigan 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 Detroit-Port Huron IntrastateIIIIIIIIIII
Metropolitan Toledo InterstateIIIIIIIII
South Central Michigan IntrastateIIIIIIIIIIIII
South Bend-Elkhart (Indiana)-Benton Harbor (Michigan) InterstateIIAIIIIIIIII
Central Michigan IntrastateIIIIIIIIIIIIII
Upper Michigan IntrastateIIIIIIIIIIIIIII
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