The New Hampshire plan was evaluated on the basis of the following classifications: ----------------------------------------------------------------------------------------------------------------
Pollutant
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Air quality control region Particulate Sulfur Nitrogen Carbon
matter oxides dioxide monoxide Ozone----------------------------------------------------------------------------------------------------------------Androscoggin Valley Interstate............................ IA IA III III IIICentral New Hampshire Intrastate.......................... III III III III IIIMerrimack Valley-Southern New Hampshire Interstate........ I I III III III---------------------------------------------------------------------------------------------------------------- [37 FR 10879, May 31, 1972, as amended at 45 FR 24876, Apr. 11, 1980]