CalEnviroScreen 3.0 “is a screening methodology that can be used to help identify California communities that are disproportionately burdened by multiple sources of pollution.”

California Health Interview Survey (CHIS) California health data on asthma and other health conditions.

Caltrans Divisions of Traffic Operations  California Department of Transportation traffic count information for traffic volumes and truck traffic on freeways, city and county streets.

California Environmental Health Tracking Program Traffic volume data from the Environmental Health Investigations Branch of the California Department of Public Health.

Census.gov has demographic data on cities including population, race and ethnicity, income, and housing.

Centers for Disease Control and Prevention (CDC) has U.S. data and statistics on diseases and health conditions such as asthma.

Environmental Health Perspectives: Children's Health page features timely children's health research and news articles from the journal.