Skip to content
@USEPA

U.S. Environmental Protection Agency

Protecting Human Health and the Environment
README.md

27874383918_9e9df28bd2_k

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

Pinned Loading

  1. WNTR WNTR Public

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

    Python 407 213

  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) 1 Updated Jan 9, 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" to be submitted to Limnology and Oceanography Letters in July 2025. The project was led by the US EPA's Office of Research and Development.

    USEPA/SuRGE’s past year of commit activity
    HTML 0 MIT 1 8 0 Updated Jan 9, 2026
  • e-manifest Public

    API services documentation and reference material for the e-Manifest hazardous waste tracking system

    USEPA/e-manifest’s past year of commit activity
    HTML 30 CC0-1.0 24 2 0 Updated Jan 9, 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 9, 2026
  • haztrak Public

    Open-source waste management software, focused on interfacing with e-Manifest to track hazardous waste electronically

    USEPA/haztrak’s past year of commit activity
    Python 61 MIT 23 2 8 Updated Jan 8, 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 8, 2026
  • flowsa Public

    Library that attributes resource use, waste, emissions, and loss to economic sectors

    USEPA/flowsa’s past year of commit activity
    Python 34 MIT 24 26 1 Updated Jan 8, 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 8, 2026
  • ctxR Public

    US EPA's ctxR: Utilities for Interacting with the CTX APIs in R without prior API knowledge https://www.epa.gov/comptox-tools/computational-toxicology-and-exposure-apis

    USEPA/ctxR’s past year of commit activity
    R 18 GPL-3.0 9 7 0 Updated Jan 8, 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
    R 37 CC0-1.0 10 11 0 Updated Jan 8, 2026
View all repositories