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@USEPA

U.S. Environmental Protection Agency

Protecting Human Health and the Environment

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The US Environmental Protection Agency's mission is to protect human health and the environment. We develop models, tool, data sets, libraries, and applications to help serve our mission.

As part of the government's open source initiative, we publish software here and are open to recieving contributions depending on the project. Please see each repository's CONTRIBUTING.md file for how you can help.

Check out EPA's public open job postings usajobs.gov.

Here are some interesting topics to explore:

  • research -- EPA develops models and tools to study environmental issues
  • ow -- EPA's office of water studies and regulates the US's waterways
  • oar -- EPA's Office of Air and Radiation studies and regulates air pollution and emissions

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  1. WNTR WNTR Public

    An EPANET compatible python package to simulate and analyze water distribution networks under disaster scenarios.

    Python 414 222

  2. CMAQ CMAQ Public

    Code for U.S. EPA’s Community Multiscale Air Quality Model (CMAQ) for estimating ozone, particulates, toxics, and deposition of acids and nutrients at neighborhood to global scales.

    Fortran 349 225

  3. Stormwater-Management-Model Stormwater-Management-Model Public

    Dynamic hydrology-hydraulic water quality simulation model for stormwater, wastewater, and combined sewer collection systems

    C 319 213

Repositories

Showing 10 of 675 repositories
  • code-json-generator Public Forked from emartinez-usgs/code-json-generator

    Automation that scrapes USEPA github and provides that metadata for code.gov

    USEPA/code-json-generator’s past year of commit activity
    JavaScript 2 MIT 10 0 0 Updated Mar 7, 2026
  • USEPA/campdRShinyDataSource’s past year of commit activity
    R 3 MIT 2 0 0 Updated Mar 7, 2026
  • EPATADA Public

    This R package can be used to compile and evaluate Water Quality Portal (WQP) data for samples collected from surface water monitoring sites on streams and lakes. It can be used to create applications that support water quality programs and help states, tribes, and other stakeholders efficiently analyze the data.

    USEPA/EPATADA’s past year of commit activity
    R 69 CC0-1.0 26 123 (7 issues need help) 5 Updated Mar 7, 2026
  • webcms Public

    Content management system for EPA's flagship website, www.epa.gov

    USEPA/webcms’s past year of commit activity
    JavaScript 13 8 0 42 Updated Mar 7, 2026
  • UACM Public

    Urban Version of WRF-CMAQ

    USEPA/UACM’s past year of commit activity
    Fortran 2 3 0 0 Updated Mar 6, 2026
  • pf_python_modelbuilding Public

    Python based code to create qsar models for WebTEST2.0 platform

    USEPA/pf_python_modelbuilding’s past year of commit activity
    Python 2 2 0 0 Updated Mar 6, 2026
  • emf Public

    Emissions Modeling Framework (EMF)

    USEPA/emf’s past year of commit activity
    Java 6 MIT 5 58 0 Updated Mar 6, 2026
  • govchat Public Forked from Patrick-Davis-MSFT/chatbot-ui

    Customized GenAI chatbot interface for EPA employees

    USEPA/govchat’s past year of commit activity
    TypeScript 5 MIT 9,653 0 0 Updated Mar 6, 2026
  • IntraCMS Public

    US EPA Intranet CMS

    USEPA/IntraCMS’s past year of commit activity
    CSS 7 MIT 3 0 0 Updated Mar 6, 2026
  • hawc Public

    Captures key data for health assessment of chemicals and other environmental hazards

    USEPA/hawc’s past year of commit activity
    Python 10 4 0 1 Updated Mar 6, 2026

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