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@USEPA

U.S. Environmental Protection Agency

Protecting Human Health and the Environment
README.md

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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 469 240

  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 376 249

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 29 153 (5 issues need help) 6 Updated Oct 24, 2026
  • Lepak_Hg_Models Public

    NLA sediment Hg analysis for Lepak et al.

    USEPA/Lepak_Hg_Models's past year of commit activity
    R 1 MIT 0 0 0 Updated Oct 23, 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 Oct 23, 2026
  • IntraCMS Public

    US EPA Intranet CMS

    USEPA/IntraCMS's past year of commit activity
    CSS 8 MIT 3 0 1 Updated Oct 23, 2026
  • 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" published in Limnology and Oceanography Letters (doi.org/10.1002/lol2.70080). The project was led by the US EPA's Office of Research and Development.

    USEPA/SuRGE's past year of commit activity
    HTML 2 MIT 1 8 0 Updated Oct 23, 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 Oct 23, 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 40 Updated Oct 23, 2026
  • SSN2 Public

    SSN2: Spatial Modeling on Stream Networks in R

    USEPA/SSN2's past year of commit activity
    R 26 GPL-3.0 8 0 0 Updated Oct 22, 2026
  • StreamCatTools Public

    R package to work with the StreamCat API within R and access the full suite of StreamCat catchment and watershed scale metrics for all NHDPlusV2 stream reaches and catchments.

    USEPA/StreamCatTools's past year of commit activity
    HTML 41 15 12 0 Updated Oct 22, 2026
  • expert-query Public

    Expert Query provides the public, EPA, state, and tribal users the ability to download detailed ATTAINS data.

    USEPA/expert-query's past year of commit activity
    TypeScript 1 CC0-1.0 4 0 0 Updated Oct 22, 2026
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