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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 411 218

  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 348 225

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

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

    C 319 213

Repositories

Showing 10 of 669 repositories
  • 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 Feb 14, 2026
  • USEPA/campdRShinyDataSource’s past year of commit activity
    R 3 MIT 2 0 0 Updated Feb 14, 2026
  • power-profiler Public

    Code used to develop eGRID's Power Profiler

    USEPA/power-profiler’s past year of commit activity
    Vue 24 MIT 7 34 7 Updated Feb 14, 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 68 CC0-1.0 25 121 (7 issues need help) 7 Updated Feb 14, 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 20 CC0-1.0 8 25 1 Updated Feb 14, 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 Feb 13, 2026
  • StreamCat Public

    Landscape summaries of natural and anthropogenic landscape features for ~2.65 million streams, and their associated catchments, within the conterminous USA

    USEPA/StreamCat’s past year of commit activity
    Python 56 17 39 0 Updated Feb 13, 2026
  • ShinyVB Public

    Shiny version of Virtual Beach

    USEPA/ShinyVB’s past year of commit activity
    R 0 Apache-2.0 1 0 0 Updated Feb 13, 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 2 1 Updated Feb 13, 2026
  • invitroTKstats Public

    Data processing pipeline R package for in vitro HTTK data (raw MS data to HTTK physiological parameters), including both frequentist and Bayesian estimates.

    USEPA/invitroTKstats’s past year of commit activity
    R 2 0 0 0 Updated Feb 13, 2026