§ 52.621. Classification of regions.
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/us/cfr/t40/s§ 52.621·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
The Hawaii plan was evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons) State of HawaiiIIIIIIIIIIIIII [37 FR 10860, May 31, 1972]