Table 7-5: Massachusetts Air Quality Nonattainment Areas for Carbon Monoxide (CO)

Table 7-5: Massachusetts Air Quality Nonattainment Areas for Carbon Monoxide (CO)

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County Area Nonattainment in year Redesignation to attainment Classification Part or whole county Population (2000)
Hampden Springfield 95 96 97 98 99 00 01 NA Not classified Part 152,082
Middlesex Boston 95 4/1/96 Moderate <= 12.7ppm Part 328,975
Middlesex Lowell 95 96 97 98 99 00 01 NA Not classified Part 105,167
Middlesex Waltham 95 96 97 98 99 00 01 NA Not classified Part 59,226
Norfolk Boston 95 4/1/96 Moderate <= 12.7ppm Part 88,025
Suffolk Boston 95 4/1/96 Moderate <= 12.7ppm Part 671,504
Worcester Worcester 95 96 97 98 99 00 01 NA Not classified Part 172,648

KEY: NA = not applicable; ppm = parts per million.

NOTES: Nonattainment areas do not meet the national primary or secondary ambient air quality standard for the specified pollutant. Nonattainment areas are classified based on design values: Serious = an area with a design value of 16.5 ppm and above; Moderate = an area with a design value of 9.1 up to 16.4 ppm.

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