East Bay north shore communities impacted by the petrochemical industry and other industrial point sources.
We used the National Air toxic Assessment NATA data to identify census tracts with elevated risk.  Specifically, we used elevated cancer and non-cancer risk from point sources emitting hazardous air pollutants (HAPs) as regulated by the U.S. EPA.  We also used CalEnviroScreen 2.0 data layers, specifically the U.S. EPA’s Risk Screening Environmental Indicators (RSEI) data.  RSEI uses toxic release inventory (TRI) data, emission locations and weather to model how chemicals spread in the air (in 810m-square grid units), and combines air concentrations with toxicity factors.
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