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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

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  1. WNTR WNTR Public

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

    Python 372 206

  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 291 197

Repositories

Showing 10 of 628 repositories
  • 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
    2 CC0-1.0 2 0 0 Updated Aug 12, 2025
  • 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 0 MIT 10 0 0 Updated Aug 12, 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 18 Updated Aug 12, 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 6 Updated Aug 12, 2025
  • 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 67 (7 issues need help) 4 Updated Aug 11, 2025
  • LakeCat Public

    Landscape summaries of natural and anthropogenic landscape features for ~378,088 lakes and their associated catchments across the conterminous US.

    USEPA/LakeCat’s past year of commit activity
    Python 21 6 6 0 Updated Aug 11, 2025
  • USEPA/CompTox-IUCLIDTools’s past year of commit activity
    Python 2 4 1 3 Updated Aug 12, 2025
  • GEPA Public

    This repository contains the code for the EPA U.S. gridded methane greenhouse gas inventory (gridded GHGI)

    USEPA/GEPA’s past year of commit activity
    Python 8 MIT 7 0 0 Updated Aug 12, 2025
  • test-app Public

    Repository for downloadable TEST (Toxicity Estimation Software Tool) Java application

    USEPA/test-app’s past year of commit activity
    Java 0 2 0 0 Updated Aug 11, 2025
  • IntraCMS Public

    US EPA Intranet CMS

    USEPA/IntraCMS’s past year of commit activity
    CSS 6 MIT 3 0 0 Updated Aug 11, 2025

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