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@USEPA

U.S. Environmental Protection Agency

Protecting Human Health and the Environment
README.md

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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 426 225

  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 354 226

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

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

    C 330 224

Repositories

Showing 10 of 680 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 71 CC0-1.0 28 124 (7 issues need help) 2 Updated Apr 20, 2026
  • CIP-service Public

    Updated version of Catchment Index Processing (CIP) Service to provide an API where outside users can index their own GIS data to NHDPlus hydrography

    USEPA/CIP-service’s past year of commit activity
    PLpgSQL 8 CC0-1.0 2 0 0 Updated Apr 19, 2026
  • provisional_habs Public

    Repository holding data from Harmful Algal Bloom (HAB) monitoring conducted by United States Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modelling, Atlantic Coastal Environmental Sciences Division researchers

    USEPA/provisional_habs’s past year of commit activity
    3 CC0-1.0 2 1 0 Updated Apr 19, 2026
  • ExpertQueryTMDLDashboard Public

    The ExpertQueryTMDLDashboard is an R Shiny application designed to summarize and count TMDLS based on user inputs to filters on various fields including state, region, pollutant, year, and addressed parameter. TMDL data from ATTAINS are downloaded via Expert Query web services and are refreshed weekly.

    USEPA/ExpertQueryTMDLDashboard’s past year of commit activity
    HTML 0 CC0-1.0 0 0 0 Updated Apr 19, 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 Apr 19, 2026
  • webcms Public

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

    USEPA/webcms’s past year of commit activity
    JavaScript 13 8 0 42 Updated Apr 17, 2026
  • surge_morpho Public

    Repository for working with lake morphometry and bathy datasets

    USEPA/surge_morpho’s past year of commit activity
    Rich Text Format 0 0 0 0 Updated Apr 17, 2026
  • AMET Public

    Code base for the U.S. EPA’s Atmospheric Model Evaluation Tool (AMET)

    USEPA/AMET’s past year of commit activity
    R 26 26 1 2 Updated Apr 17, 2026
  • BMDS Public

    U.S EPA Benchmark Dose Modeling Software (BMDS)

    USEPA/BMDS’s past year of commit activity
    C++ 8 MIT 6 2 1 Updated Apr 17, 2026
  • rExpertQuery Public

    An R package designed for retrieving ATTAINS data efficiently via Expert Query web services.

    USEPA/rExpertQuery’s past year of commit activity
    HTML 8 CC0-1.0 5 5 1 Updated Apr 17, 2026
View all repositories

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