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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 464 239

  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 366 233

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

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

    C 367 240

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 76 CC0-1.0 29 150 (5 issues need help) 6 Updated Sep 30, 2026
  • webcms Public

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

    JavaScript 13 MIT 8 0 35 Updated Sep 30, 2026
  • IntraCMS Public

    US EPA Intranet CMS

    USEPA/IntraCMS's past year of commit activity
    CSS 8 MIT 3 0 1 Updated Sep 29, 2026
  • EnviroAtlas_v4 Public

    EnviroAtlas migration to JS4. Easy to use, interactive mapping application to access maps showing environmental data

    USEPA/EnviroAtlas_v4's past year of commit activity
    Svelte 6 MIT 1 0 0 Updated Sep 29, 2026
  • USEPA/ccte-container-scan's past year of commit activity
    Python 1 0 0 0 Updated Sep 29, 2026
  • provisional_habs Public

    Repository holding data from Harmful Algal Bloom (HAB) monitoring conducted by United States Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modelling, Atlantic Coastal Environmental Sciences Division researchers

    USEPA/provisional_habs's past year of commit activity
    3 CC0-1.0 2 0 0 Updated Sep 29, 2026
  • pyTRIM_EPA Public
    USEPA/pyTRIM_EPA's past year of commit activity
    Python 2 0 0 0 Updated Sep 29, 2026
  • EIB-TSD Public

    Technical Support Documents from the Emissions Inventory Branch in OSAP-AQAD

    USEPA/EIB-TSD's past year of commit activity
    TeX 0 1 0 0 Updated Sep 29, 2026
  • USEPA/ccte-api-karate's past year of commit activity
    Gherkin 1 1 2 1 Updated Sep 29, 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 Sep 29, 2026