Statistical References About Asthma:

http://www.californiabreathing.org/index.php?option=com_content&task=view&id=34&Itemid=44
This location offers a two page County Asthma Profile report for each county in California with statistical reference information on disease prevalence by age, ethnicity and other factors

California Breathing is a program of the California Department of Public Health's Environmental Health Investigations Branch. Their purpose is to advance strategies outlined in the  Strategic Plan for Asthma in California 2008-2012.  To learn more about asthma in California, download, The Burden of Asthma in California: A Surveillance Report

http://www.calcleanair.org
This site offers current reports on air quality for the San Joaquin Valley