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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 408 213

  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 341 224

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

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

    C 314 212

Repositories

Showing 10 of 663 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 62 CC0-1.0 23 94 (7 issues need help) 2 Updated Jan 12, 2026
  • BMDS Public

    U.S EPA Benchmark Dose Modeling Software (BMDS)

    USEPA/BMDS’s past year of commit activity
    C++ 6 MIT 6 2 3 Updated Jan 12, 2026
  • spmodel Public

    spmodel: Spatial Statistical Modeling and Prediction in R

    USEPA/spmodel’s past year of commit activity
    R 18 GPL-3.0 4 0 0 Updated Jan 12, 2026
  • 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 27 Updated Jan 12, 2026
  • 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 Jan 12, 2026
  • WMLCI Public

    Waste Management Life Cycle Inventory Model Assembler and Calculator

    USEPA/WMLCI’s past year of commit activity
    Python 2 MIT 1 0 0 Updated Jan 12, 2026
  • CHAPPIE Public

    Community Hazard-scape and Amenity Placement for Providing Improved Endpoints

    USEPA/CHAPPIE’s past year of commit activity
    Jupyter Notebook 1 MIT 0 44 5 Updated Jan 12, 2026
  • USEPA/Water-Infrastructure-and-Capacity-Assessment-Tool’s past year of commit activity
    R 1 MIT 0 0 0 Updated Jan 12, 2026
  • USEPA/pattern-scaled-climate-variables’s past year of commit activity
    R 1 MIT 2 0 0 Updated Jan 12, 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 1 MIT 10 0 0 Updated Jan 12, 2026

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