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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 422 225

  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 349 226

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

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

    C 326 223

Repositories

Showing 10 of 679 repositories
  • SuRGE Public

    Code to reproduce the data files described in "Summertime methane and carbon dioxide emission rates and associated variables from a national-scale survey of 146 reservoirs in the United States" to be submitted to Limnology and Oceanography Letters in July 2025. The project was led by the US EPA's Office of Research and Development.

    USEPA/SuRGE’s past year of commit activity
    HTML 1 MIT 1 8 0 Updated Apr 7, 2026
  • invitroTKdata Public

    This is an R data package containing a collection of in vitro toxicokinetic datasets (related to manuscripts) processed with the invitroTKstats R package.

    USEPA/invitroTKdata’s past year of commit activity
    R 0 0 0 0 Updated Apr 7, 2026
  • RAQSAPI Public

    A R extension to retrieve EPA Air Quality System Data via the AQS Data Mart API

    USEPA/RAQSAPI’s past year of commit activity
    R 26 8 4 0 Updated Apr 7, 2026
  • USEPA/ccte-container-scan’s past year of commit activity
    0 0 0 0 Updated Apr 7, 2026
  • 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 4 0 0 Updated Apr 7, 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 Apr 7, 2026
  • 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 Apr 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 71 CC0-1.0 26 127 (7 issues need help) 3 Updated Apr 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 Apr 6, 2026
  • USEPA/ccte-docker-build’s past year of commit activity
    0 2 0 0 Updated Apr 6, 2026

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