Table 7-5: Massachusetts Air Quality Nonattainment Areas for Carbon Monoxide (CO)
Tuesday, January 3, 2012
Table 7-5: Massachusetts Air Quality Nonattainment Areas for Carbon Monoxide (CO)
| 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.