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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 428 225

  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 354 227

  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 682 repositories
  • egrid Public

    Emissions & Generation Resource Integrated Database (eGRID)

    USEPA/egrid’s past year of commit activity
    R 29 MIT 11 7 0 Updated Apr 23, 2026
  • vue_chemical_transformation_AEM Public
    USEPA/vue_chemical_transformation_AEM’s past year of commit activity
    Vue 0 0 0 0 Updated Apr 23, 2026
  • TMDLDash 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/TMDLDash’s past year of commit activity
    HTML 0 CC0-1.0 0 0 0 Updated Apr 23, 2026
  • Water_Treatment_Models Public

    Predicting water treatment unit operation effectiveness

    USEPA/Water_Treatment_Models’s past year of commit activity
    Python 41 MIT 36 1 0 Updated Apr 23, 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 71 CC0-1.0 28 122 (7 issues need help) 1 Updated Apr 23, 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 5 MIT 0 0 0 Updated Apr 23, 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 0 0 Updated Apr 23, 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 23, 2026
  • inundation-time-series-mapper Public

    Map inundation (i.e., groundwater-surface intersection) through time and at large-scales (e.g., CONUS) and high resolutions (e.g., 1-m2) using high resolution topographic data, low resolution (e.g., 1-km2) dynamically simulated water table depth (e.g., from ParFlow), and TOPMODEL-based assumptions

    USEPA/inundation-time-series-mapper’s past year of commit activity
    Python 1 0 0 0 Updated Apr 22, 2026
  • spmodel Public

    spmodel: Spatial Statistical Modeling and Prediction in R

    USEPA/spmodel’s past year of commit activity
    R 23 GPL-3.0 5 0 0 Updated Apr 22, 2026
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