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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:

  • ord -- EPA's office of research and development 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

Pinned Loading

  1. WNTR WNTR Public

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

    Python 373 208

  2. CMAQ CMAQ Public

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

    Fortran 322 221

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

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

    C 292 199

Repositories

Showing 10 of 630 repositories
  • 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 55 CC0-1.0 23 72 (7 issues need help) 2 Updated Aug 19, 2025
  • BMDS-UI Public

    U.S. EPA Benchmark Dose Modeling Software User Interface (BMDS Desktop and BMDS Online)

    USEPA/BMDS-UI’s past year of commit activity
    CSS 4 MIT 3 0 0 Updated Aug 19, 2025
  • webcms Public

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

    USEPA/webcms’s past year of commit activity
    JavaScript 11 9 0 26 Updated Aug 19, 2025
  • IntraCMS Public

    US EPA Intranet CMS

    USEPA/IntraCMS’s past year of commit activity
    CSS 6 MIT 3 0 0 Updated Aug 19, 2025
  • WATERSGeoViewer Public

    Source Code for the EPA WATERS GeoViewer

    USEPA/WATERSGeoViewer’s past year of commit activity
    Python 0 CC0-1.0 0 0 0 Updated Aug 19, 2025
  • ShinyVB Public

    Shiny version of Virtual Beach

    USEPA/ShinyVB’s past year of commit activity
    R 0 Apache-2.0 1 0 0 Updated Aug 19, 2025
  • FrEDI Public

    FrEDI estimates annual physical and economic impacts from temperature to the U.S., through the 21st century

    USEPA/FrEDI’s past year of commit activity
    HTML 15 15 6 1 Updated Aug 19, 2025
  • MCSimMod Public

    MCSim Models in R

    USEPA/MCSimMod’s past year of commit activity
    C 7 GPL-3.0 0 1 0 Updated Aug 19, 2025
  • BMDS Public

    U.S EPA Benchmark Dose Modeling Software (BMDS)

    USEPA/BMDS’s past year of commit activity
    C++ 4 MIT 4 0 1 Updated Aug 19, 2025
  • SSN2 Public

    SSN2: Spatial Modeling on Stream Networks in R

    USEPA/SSN2’s past year of commit activity
    R 23 GPL-3.0 7 0 0 Updated Aug 19, 2025