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

Table 7-5: Washington 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)
Clark Vancouver 95 96 10/21/96 Moderate <= 12.7ppm Part 324,869
King Seattle-Tacoma 95 96 10/11/96 Moderate > 12.7ppm Part 1,523,379
Pierce Seattle-Tacoma 95 96 10/11/96 Moderate > 12.7ppm Part 614,619
Snohomish Seattle-Tacoma 95 96 10/11/96 Moderate > 12.7ppm Part 531,483
Spokane Spokane 95 96 97 98 99 00 01 NA Serious Part 322,691
Yakima Yakima 95 96 97 98 99 00 01 NA Not Classified Part 63,658

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.