CalEnviroScreen 3.0

The Office of Environmental Health Hazard Assessment (OEHHA), on behalf of the California Environmental Protection Agency (CalEPA), announces the availability of the California Communities Environmental Health Screening Tool: CalEnviroScreen 3.0.

CalEPA has used CalEnviroScreen 3.0 to designate disadvantaged communities pursuant to Senate Bill 535 in April 2017.

CalEnviroScreen is a screening methodology that can be used to help identify California communities that are disproportionately burdened by multiple sources of pollution. This version updates CalEnviroScreen in a variety of ways. The updates are described in more detail in the New in CalEnviroScreen 3.0 document below. 

Major changes include:

  • More recent data for all indicators.
  • The addition of two new indicators reflecting health and socioeconomic vulnerability to pollution.
  • Improvements in the way some indicators are calculated to better reflect environmental conditions or a community’s vulnerability to pollution.
  • Additional information on pollution along the California-Mexico border.
  • The removal of the “children and elderly” age indicator, and replacement with an analysis of age.
  • A change in overall scoring methodology that enables each of the four categories of indicators to make a clearer contribution to a census tract's overall CalEnviroScreen score.

Press Release

CalEPA and OEHHA Finalize Major Update to Environmental Health Screening Tool:
CalEnviroScreen 3.0 to help guide investment in disadvantaged communities across the state


CalEnviroScreen 3.0 Report and documents:

OEHHA held a series of webinars and workshops for the public to learn about the updates and provide public comment on the draft. Public comments and workshop summaries can be viewed here.

CalEnviroScreen 3.0 Map:

Map of CalEnviroScreen 3.0 Results. Click to open in a new window.

Note: The map of SB535 disadvantaged communities (2017) can be found here.

Indicator maps are available on the individual indicator pages, or through this combined map.

CalEnviroScreen 3.0 Data and Additional Materials:

  • Microsoft Excel spreadsheet: A spreadsheet showing raw data and calculated percentiles for individual indicators and combined CalEnviroScreen scores for individual census tracts with additional demographic information: CES3results.xlsx
  • Factsheet on CalEnviroScreen 3.0 (English). Available in Spanish (Disponible aquí).
  • Google Earth file: A zipped file which can be opened using the free Google Earth application to view results in map format (Google Earth may be downloaded here). Please refer to the 'Data Dictionary' tab in the spreadsheet above for information on the values in the google earth file:
  • ArcGIS Geodatabase: Includes CalEnviroScreen 3.0 results by census tract. Additional information describing the data and its limitations is part of the geodatabase (metadata).   A zipped file which can be unzipped, then opened using ArcGIS software to view the results in a File Geodatabase Feature Class format (ArcGIS is a paid subscription):
  • Shapefile: Includes CalEnviroScreen 3.0 results by census tract. Additional information describing the data and its limitations is part of the shapefile (metadata). Zipped file can be unzipped, and then opened in any GIS software:
  • Methodology for A Statewide Drinking Water Contaminant Indicator: Technical document on the Drinking Water Contaminant Index indicator. CES3_dwmethodology.pdf

En Español

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