NEPAssist is a tool that facilitates the environmental review process and project planning in relation to environmental considerations. The web-based application draws environmental data dynamically from EPA Geographic Information System databases and web services and provides immediate screening of environmental assessment indicators for a user-defined area of interest. These features contribute to a streamlined review process that potentially raises important environmental issues at the earliest stages of project development.​

Resources for NEPAssist Users

  • NEPAssist User Guide - provides assistance on how to use the NEPAssist tool.
  • Description of Map Features - provides information on available data features in NEPAssist.
  • EJSCREEN - an environmental justice mapping and screening tool that provides EPA with a nationally consistent dataset and approach for combining environmental and demographic indicators.

Launch the Tool

Note: Users are reporting problems using NEPAssist and Internet Explorer 9. No problems are being reported using other browsers.

For questions or assistance on NEPAssist, please email NEPAssist (