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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

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  1. WNTR WNTR Public

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

    Python 408 215

  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 348 224

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

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

    C 319 211

Repositories

Showing 10 of 668 repositories
  • SW_Model Public

    New, organized version of water_temp_model

    USEPA/SW_Model’s past year of commit activity
    R 0 0 0 0 Updated Jan 30, 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 65 CC0-1.0 24 111 (7 issues need help) 2 Updated Jan 30, 2026
  • EnviroAtlas_v4 Public

    EnvrioAtlas migration to JS4. Easy to use, interactive mapping application to access hundreds of maps showing environmental data

    USEPA/EnviroAtlas_v4’s past year of commit activity
    Svelte 3 MIT 0 0 0 Updated Jan 30, 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 2 MIT 10 0 0 Updated Jan 30, 2026
  • USEPA/campdRShinyDataSource’s past year of commit activity
    R 3 MIT 2 0 0 Updated Jan 30, 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 38 CC0-1.0 10 11 0 Updated Jan 29, 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 Jan 29, 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 29, 2026
  • FrEDI_Data Public

    Data repo for FrEDI, a tool to estimate economic impacts from temperature

    USEPA/FrEDI_Data’s past year of commit activity
    HTML 2 MIT 4 10 0 Updated Jan 29, 2026
  • spmodel Public

    spmodel: Spatial Statistical Modeling and Prediction in R

    USEPA/spmodel’s past year of commit activity
    R 22 GPL-3.0 4 0 0 Updated Jan 29, 2026

Most used topics

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