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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

Pinned Loading

  1. WNTR WNTR Public

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

    Python 473 244

  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 370 236

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

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

    C 381 250

Repositories

Showing 10 of 698 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 77 CC0-1.0 29 153 (5 issues need help) 6 Updated Nov 2, 2026
  • USEPA/TADAShinyJoinToAU's past year of commit activity
    R 1 CC0-1.0 1 20 (4 issues need help) 1 Updated Nov 2, 2026
  • USEPA/TADAShinyAnalyze's past year of commit activity
    R 2 CC0-1.0 1 13 2 Updated Nov 2, 2026
  • TADACommunityHub Public

    A collaborative hub where TADA users share and maintain information for custom workflows (e.g., state, tribal, territory, EPA, or other entities). For example, it includes user-contributed criteria and methodologies templates to support reproducible and efficient analyses.

    USEPA/TADACommunityHub's past year of commit activity
    R 1 CC0-1.0 1 15 3 Updated Nov 2, 2026
  • TADAShiny Public

    TADAShiny is a R Shiny application (link to web version below) built on top of the TADA R Package (https://github.com/USEPA/TADA). It provides a user friendly, web accessible interface.

    USEPA/TADAShiny's past year of commit activity
    R 25 CC0-1.0 10 19 1 Updated Nov 2, 2026
  • WNTR Public

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

    USEPA/WNTR's past year of commit activity
    Python 473 244 27 8 Updated Nov 2, 2026
  • webcms Public

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

    USEPA/webcms's past year of commit activity
    JavaScript 13 MIT 8 0 45 Updated Nov 2, 2026
  • mirror-bb Public

    bitbucket mirror

    USEPA/mirror-bb's past year of commit activity
    0 0 0 0 Updated Nov 2, 2026
  • spsurvey Public

    spsurvey: Spatial Sampling Design and Analysis in R

    USEPA/spsurvey's past year of commit activity
    R 22 GPL-3.0 9 1 0 Updated Nov 2, 2026
  • BMDS Public

    U.S EPA Benchmark Dose Modeling Software (BMDS)

    USEPA/BMDS's past year of commit activity
    C++ 14 MIT 7 2 4 Updated Nov 2, 2026