Classification of regions.

§ 52.2021 Classification of regions.

The Pennsylvania plan was evaluated on the basis of the following classifications:

Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone (hydrocarbons)
Metropolitan Philadelphia InterstateIIIIIII
Northeast Pennsylvania-Upper Delaware Valley InterstateIIIIIIIIIIII
South Central Pennsylvania IntrastateIIIIIIIIIIII
Central Pennsylvania IntrastateIIIIIIIIIIIII
Southwest Pennsylvania IntrastateIIIIIII
Northwest Pennsylvania-Youngstown InterstateIIIIIIIIIIII
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