California air pollution stats

County	First data available	Last data available
Alameda Co	1997	2007
Amador Co	1997	2007
Butte Co	1997	2007
Calaveras Co	1997	2007
Colusa Co	1997	2007
Contra Costa Co	1997	2007
Del Norte Co	1997	2007
El Dorado Co	1997	2007
Fresno Co	1997	2007
Glenn Co	1997	2007
Humboldt Co	1997	2007
Imperial Co	1997	2007
Inyo Co	1997	2007
Kern Co	1997	2007
Kings Co	1997	2007
Lake Co	1997	2007
Lassen Co	1997	2001
Los Angeles Co	1997	2007
Madera Co	1997	2007
Marin Co	1997	2007
Mariposa Co	1997	2007
Mendocino Co	1997	2007
Merced Co	1997	2007
Modoc Co	1997	2003
Mono Co	1997	2007
Monterey Co	1997	2007
Napa Co	1997	2007
Nevada Co	1997	2007
Orange Co	1997	2007
Placer Co	1997	2007
Plumas Co	1997	2007
Riverside Co	1997	2007
Sacramento Co	1997	2007
San Benito Co	1997	2007
San Bernardino Co	1997	2007
San Diego Co	1997	2007
San Francisco Co	1997	2007
San Joaquin Co	1997	2007
San Luis Obispo Co	1997	2007
San Mateo Co	1997	2007
Santa Barbara Co	1997	2007
Santa Clara Co	1997	2007
Santa Cruz Co	1997	2007
Shasta Co	1997	2007
Sierra Co	1997	2000
Siskiyou Co	1997	2007
Solano Co	1997	2007
Sonoma Co	1997	2007
Stanislaus Co	1997	2007
Sutter Co	1997	2007
Tehama Co	1997	2007
Trinity Co	1997	2007
Tulare Co	1997	2007
Tuolumne Co	1997	2007
Ventura Co	1997	2007
Yolo Co	1997	2007