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

Table 7-5: California 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)
Alameda San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Part 684,044
Butte Chico 95 96 97 6/1/98 Moderate <= 12.7ppm Part 80,313
Contra Costa San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Part 767,307
El Dorado Lake Tahoe South Shore 95 96 97 6/1/98 Moderate <= 12.7ppm Part 37,215
Fresno Fresno 95 96 97 6/1/98 Moderate > 12.7ppm Part 542,558
Kern Bakersfield 95 96 97 6/1/98 NA Part 368,867
Los Angeles Los Angeles South Coast Air Basin 95 96 97 98 99 00 01 NA Serious Part 9,270,321
Marin San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Part 214,944
Napa San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Part 112,199
Orange Los Angeles South Coast Air Basin 95 96 97 98 99 00 01 NA Serious Whole 2,846,289
Placer Lake Tahoe North Shore 95 96 97 6/1/98 NA Part 11,501
Placer Sacramento 95 96 97 6/1/98 Moderate <= 12.7ppm Part 73,303
Riverside Los Angeles South Coast Air Basin 95 96 97 98 99 00 01 NA Serious Part 1,320,379
Sacramento Sacramento 95 96 97 6/1/98 Moderate <= 12.7ppm Part 1,191,566
San Bernardino Los Angeles South Coast Air Basin 95 96 97 98 99 00 01 NA Serious Part 1,506,524
San Diego San Diego 95 96 97 6/1/98 Moderate <= 12.7ppm Part 2,644,722
San Francisco San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Whole 776,733
San Joaquin Stockton 95 96 97 6/1/98 Moderate <= 12.7ppm Part 307,217
San Mateo San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Part 489,850
Santa Clara San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Part 561,815
Solano San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Part 231,793
Sonoma San Francisco-Oakland-San Jose 95 96 97 6/1/98 Moderate <= 12.7ppm Part 236,278
Stanislaus Modesto 95 96 97 6/1/98 Moderate <= 12.7ppm Part 278,658
Yolo Sacramento 95 96 97 6/1/98 Moderate <= 12.7ppm Part 38,252

KEY: NA = not applicable.

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 April 20, 2002.