EPA, Air Resources Board, Air Quality Information
http://www.arb.ca.gov/aqd/aqinfo.htm

AIRNOW (CA)
http://www.avaqmd.ca.gov/

Antelope Valley Air Quality Management District, Daily Air Quality Report
http://64.227.226.15/.../today.htm

Bay Area Air Quality Management District
http://www.baaqmd.gov/

Bay Area daily air quality forecast
http://www.sparetheair.org/

Butte County Air Quality Management District
http://www.bcaqmd.org/

Colusa County Air Quality Control District
http://www.colusanet.com/apcd/air_quality.asp

County of San Diego, Air Pollution Control District
http://www.sdapcd.org/

Mojave Desert Air Quality Management District
http://www.mdaqmd.ca.gov/

Monterey Bay Unified Air Pollution Control District
http://www.mbuapcd.org/maps/

Sacramento Metropolitan Air Quality Management District
http://www.sparetheair.com/

San Joaquin Valley Air Pollution Control District, Air Quality Info.
http://www.valleyair.org/

San Luis Obispo County Air Pollution Control District, Weekly Ozone Report
http://www.slocleanair.org/...weekly-ozone.asp

Santa Barbara County Air Pollution Control District, AQI
http://www.sbcapcd.org/airdata/dlywebaqi.htm

South Coast Air Quality Management District
http://www.aqmd.gov/telemweb/Reading.html

Ventura County Air Pollution Control District
http://www.vcapcd.org/forecast/fcst.htm