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

Table 7-6: Maryland 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)
Anne Arundel Baltimore 95 96 97 98 99 00 01 NA Severe-15 Whole 489,656
Baltimore City Baltimore 95 96 97 98 99 00 01 NA Severe-15 Whole 651,154
Baltimore Baltimore 95 96 97 98 99 00 01 NA Severe-15 Whole 754,292
Calvert Washington, DC-MD-VA 95 96 97 98 99 00 01 NA Serious Whole 74,563
Carroll Baltimore 95 96 97 98 99 00 01 NA Severe-15 Whole 150,897
Cecil Philadelphia-Wilmington-Trenton, PA-NJ-DE-MD 95 96 97 98 99 00 01 NA Severe-15 Whole 85,951
Charles Washington, DC-MD-VA 95 96 97 98 99 00 01 NA Serious Whole 120,546
Frederick Washington, DC-MD-VA 95 96 97 98 99 00 01 NA Serious Whole 195,277
Harford Baltimore 95 96 97 98 99 00 01 NA Severe-15 Whole 218,590
Howard Baltimore 95 96 97 98 99 00 01 NA Severe-15 Whole 247,842
Kent Kent and Queen Anne's Counties 95 96 97 98 99 00 01 NA Marginal Whole 19,197
Montgomery Washington, DC-MD-VA 95 96 97 98 99 00 01 NA Serious Whole 873,341
Prince George's Washington, DC-MD-VA 95 96 97 98 99 00 01 NA Serious Whole 801,515
Queen Anne's Kent and Queen Anne's Counties 95 96 97 98 99 00 01 NA Marginal Whole 40,563

KEY: NA = not applicable.

NOTE: 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.

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