Table 7-6: Massachusetts Air Quality Nonattainment Areas for Ozone (O3)

Table 7-6: Massachusetts Air Quality Nonattainment Areas for Ozone (O3)

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County Area Nonattainment in year Redesignation to attainment Classification Part or whole county Population (2000)
Barnstable Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 222,230
Berkshire Springfield (Western MA), MA 95 96 97 98 99 00 01 NA Serious Whole 134,953
Bristol Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 534,678
Dukes Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 14,987
Essex Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 723,419
Franklin Springfield (Western MA), MA 95 96 97 98 99 00 01 NA Serious Whole 71,535
Hampden Springfield (Western MA), MA 95 96 97 98 99 00 01 NA Serious Whole 456,228
Hampshire Springfield (Western MA), MA 95 96 97 98 99 00 01 NA Serious Whole 152,251
Middlesex Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 1,465,396
Nantucket Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 9,520
Norfolk Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 650,308
Plymouth Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 472,822
Suffolk Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 689,807
Worcester Boston-Lawrence-Worcester (E. MA), MA-NH 95 96 97 98 99 00 01 NA Serious Whole 750,963

KEY: NA = not applicable.

NOTES: Nonattainment areas do not meet the national primary or secondary ambient air quality standard (NAAQS) for the specified pollutant. Nonattainment areas are classified based on design values: Extreme = design value of 0.280 parts per million (ppm) and above; Severe-17 = design value of 0.190 up to 0.280 ppm and has 17 years to reach attainment; Severe-15 = design value of 0.180 up to 0.190 ppm and has 15 years to reach attainment; Serious = design value of 0.160 up to 0.180 ppm; Moderate = design value of 0.138 up to 0.160 ppm; Marginal = design value of 0.121 up to 0.138 ppm; Section 185A = an area designated as an ozone nonattainment area as of the date of enactment of the Clean Air Act Amendments of 1990 and has not violated the national primary ambient air quality standard for ozone for the 36-month period commencing on Jan. 1, 1987, and ending on Dec. 31, 1989.

SOURCE: U.S. Environmental Protection Agency, Green Book, available at http://www.epa.gov/oar/oaqps/greenbk/anay.html as of Apr. 20, 2002.