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Bawasan ang polusyon sa hangin. Remote na magtrabaho, maglakad, magbisikleta, makipag-carpool, o gumamit ng pampublikong transportasyon. |
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Giảm thiểu ô nhiễm không khí. Làm việc từ xa, đi bộ, đạp xe, đi chung xe hoặc sử dụng phương tiện giao thông công cộng. |
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Reduzca la contaminación atmosférica. Trabaje a distancia, camine, use la bicicleta, comparta el automóvil o use el transporte público. |
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Health Risk Screening and Modeling
The Health Risk Screening and Modeling section includes links to the Air District's Recommended Methods for Screening and Modeling Local Risks and Hazards and links to other resources to evaluate how air pollution impacts health.
These documents are used to identify the local health effects associated with air pollution.
Local Government Support Geospatial Data and Map Portal- Updated August 25, 2025
View interactive maps designed to support California Environmental Quality Act (CEQA) lead agencies and practitioners in the environmental review process. These maps can also be used by local governments and others in environmental planning, policy and analysis. The map series includes mobile source, stationary source, and project location screening tools. The Stationary Source Screening Map and Mobile Source Screening Map are available on this portal, in addition to being described below.
Stationary Source Screening Map - Updated August 25, 2025, with 2023 emissions data
GIS map of all the stationary sources permitted by the Air District with risk and hazard estimates (tool does not estimate acute hazards since these screening levels were found to be significantly below the thresholds). View the Stationary Source Screening Map Instruction Video.
Stationary Source Data Request Form(190 Kb PDF, 1 pg, posted 8/30/2022)
This form is used to request data from the Stationary Source Screening Map (see above). Follow the instructions on the form to submit the request.
Mobile Source Screening Map
Beta version screening map that supports visualization of roadway, rail, and railyard screening level risks and hazards information for CEQA practitioners conducting a cumulative analysis. The information represents conservative health estimates reflective of 2022 for residents living near roadways (freeways and surface streets), 2024 for rail lines, and rail yards. Direct links to the roadway, rail, and railyard screening data layers are provided below.
Roadway Screening Data Layers
The roadway screening data layers provide estimated cancer risks, hazards, and PM2.5 concentrations for all Bay Area highways and surface streets.
Rail and Railyard Screening Data Layers
The rail source screening data layers provide estimated cancer risks, hazards, and PM2.5 concentrations from diesel locomotives and select railyards.
Local Risks and Hazards Analysis Process Flowchart(571 Kb PDF, 1 pg, posted 5/5/2023)
Outlines screening process for estimating risks and hazards from projects.
Health Risk Calculator with Distance Multipliers(129 Kb XLSX, posted 5/3/2022)(129 Kb XLSX, posted 5/3/2022)
Estimates screen-level cancer risks, chronic hazard indices, and PM2.5 concentrations using annual emissions data from the Air District's permitting database per Regulation 2, Rule 5 – New Source Review of Toxic Air Contaminants. This tool should only be used for permitted facilities where screening-level risks have not already been calculated by the Air District. This tool should not be used for permitted gas stations. For gas dispensing facilities, please use California Air Resources Board's Gas Station Risk Assessment Screening Tool, which is listed below.
California Air Resource Board Gas Station Risk Assessment Guidance and Tool
A tool developed by CARB for assessing gas station risk and health impacts.
AERMOD-Ready Meteorological Data
AERMOD-ready meteorological data sets for 35 sites in the Bay Area, up to nine years of data for the years 2009 through 2017. These files were processed with AERMET version 18081.
Last Updated: 4/18/2022