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§ 52.1521 Classification of regions.
The New Hampshire plan was evaluated on the basis of the following classifications:
Air quality control region | Pollutant | ||||
---|---|---|---|---|---|
Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Ozone | |
Androscoggin Valley Interstate | IA | III | III | III | III |
Central New Hampshire Intrastate | III | III | III | III | III |
Merrimack Valley—Southern New Hampshire Interstate | I | III | III | III | I |