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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 405 213

  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 338 223

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

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

    C 313 210

Repositories

Showing 10 of 662 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 1 MIT 10 0 0 Updated Dec 16, 2025
  • USEPA/campdRShinyDataSource’s past year of commit activity
    R 3 MIT 2 0 0 Updated Dec 16, 2025
  • webcms Public

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

    USEPA/webcms’s past year of commit activity
    JavaScript 12 9 0 25 Updated Dec 16, 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 61 CC0-1.0 23 100 (7 issues need help) 1 Updated Dec 16, 2025
  • 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 1 2 0 0 Updated Dec 16, 2025
  • csb-rebate-forms-app Public

    Code related to the U.S. EPA Clean School Bus (CSB) data collection system. Specifically, this repository provides code for the cloud.gov hosted CSB Rebate Forms Application (i.e., Applicant Dashboard).

    USEPA/csb-rebate-forms-app’s past year of commit activity
    CSS 2 CC0-1.0 2 0 1 Updated Dec 15, 2025
  • 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 18 CC0-1.0 8 37 1 Updated Dec 15, 2025
  • BMDS Public

    U.S EPA Benchmark Dose Modeling Software (BMDS)

    USEPA/BMDS’s past year of commit activity
    C++ 6 MIT 6 2 2 Updated Dec 15, 2025
  • invitrotkstats_dataproc Public

    Data processing scripts for manuscript datasets using the invitroTKstats R package.

    USEPA/invitrotkstats_dataproc’s past year of commit activity
    HTML 0 0 1 0 Updated Dec 15, 2025
  • ccte-api-bioactivity Public

    US EPA's CTX Bioactivity API, available at: https://comptox.epa.gov/ctx-api/docs/bioactivity.html

    USEPA/ccte-api-bioactivity’s past year of commit activity
    Java 1 MIT 1 7 0 Updated Dec 15, 2025