40 C.F.R. § 52.1121

Current through March 31, 2024
Section 52.1121 - Classification of regions

The Massachusetts 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 Boston IntrastateIIIIIII
Merrimack Valley-Southern New Hampshire InterstateIIIIIIIIIII
Metropolitan Providence InterstateIIIIIIIIIII
Central Massachusetts IntrastateIIIIIIIIIIII
Hartford-New Haven-Springfield InterstateIIIIIII
Berkshire IntrastateIIIIIIIIIIIIII

40 C.F.R. §52.1121

37 FR 10872, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 61303, Sept. 16, 1980; 84 FR 29383, June 24, 2019