Service Description: AB 617 Universe – High Cumulative Exposure Burden Areas Methodology (layers) Air District CARE Program Areas within the Bay Area where air pollution contributes most to negative health impacts and where populations are most vulnerable to air pollution. Communities designated under the CARE Program are identified as: 1) areas with high concentrations of toxic air contaminants and therefore high cancer risk and 2) areas with high population vulnerability due to increased mortality and illnesses associated with high levels of fine particulate matter and ozone. Areas with episodic “exceedances” of ambient air quality standards for particulate matter or ground-level ozone were also identified through the CARE program. Large Sources Communities located near, or substantially impacted by large industrial sources and/or large goods movement facilities and other concentrations of mobile sources. Large sources include sources like petroleum refining facilities, cement kilns, rail yards, seaports and airports. CalEnviroScreen is a mapping tool that uses environmental, health and socioeconomic information from state and federal government sources to identify California communities that are most affected by multiple sources of pollution, and where people are especially vulnerable to pollution’s effects. CalEnviroScreen uses environmental, health, and socioeconomic data to produce scores for every census tract in the state. The scores are mapped so that different communities can be compared. Census tracts in the Bay Area that were ranked within the top 25 percent of statewide scores are included in the Air District’s high cumulative exposure burden areas. The California Healthy Places Index , developed by the Public Health Alliance of Southern California, includes diverse non-medical economic, social, political and environmental factors that influence physical and cognitive function, behavior and disease. The total score is used to screen for places with higher health burden. Census tracts in the Bay Area that rank within the top 25 percent of statewide scores are included in the Bay Area’s high cumulative exposure burden areas. Life Expectancy at Birth Communities with low life expectancy at birth are also included in the Air District’s high cumulative exposure burden areas. Life expectancy data was obtained from the California Healthy Places Index project. The average expected lifespan for a person born in the Bay Area in 2010 varies widely by community, generally ranging from 70 to 90 years. Bay Area populations identified as residing in a community with “low” and “lowest” average life expectancy are included in Bay Area’s high cumulative exposure burden areas.

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