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

Table 7-6: New Hampshire 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)
Cheshire Cheshire Co. 95 96 97 98 99 00 01 NA Incomplete data Whole 73,825
Hillsborough Boston-Lawrence-Worcester, MA-NH 95 96 97 98 99 00 01 NA Serious Part 194,203
Hillsborough Manchester 95 96 97 98 99 00 01 NA Marginal Part 186,638
Merrimack Manchester 95 96 97 98 99 00 01 NA Marginal Whole 136,225
Rockingham Boston-Lawrence-Worcester, MA-NH 96 96 97 98 99 00 01 NA Serious Part 155,149
Rockingham Manchester 97 96 97 98 99 00 01 NA Marginal Part 42,064
Rockingham Portsmouth-Dover-Rochester 98 96 97 98 99 00 01 NA Serious Part 80,146
Strafford Portsmouth-Dover-Rochester 99 96 97 98 99 00 01 NA Serious Whole 112,233

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 part 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.