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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 354 226

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

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

    C 329 224

Repositories

Showing 10 of 682 repositories
  • inundation-predictor Public

    Predict inundation (i.e., groundwater-surface intersection) at high resolutions (e.g., 1-m) from high resolution topographic data, low resolution (e.g., 1-km) dynamically simulated water table depth (e.g., from ParFlow), and TOPMODEL-based assumptions

    USEPA/inundation-predictor’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
  • LakeCat Public

    Landscape summaries of natural and anthropogenic landscape features for ~378,088 lakes and their associated catchments across the conterminous US.

    USEPA/LakeCat’s past year of commit activity
    Python 20 6 6 0 Updated Apr 22, 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 22, 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 22, 2026
  • egrid Public

    Emissions & Generation Resource Integrated Database (eGRID)

    USEPA/egrid’s past year of commit activity
    R 29 MIT 11 7 0 Updated Apr 22, 2026
  • BMDS-UI Public

    U.S. EPA Benchmark Dose Modeling Software User Interface (BMDS Desktop and BMDS Online)

    USEPA/BMDS-UI’s past year of commit activity
    CSS 4 MIT 4 0 0 Updated Apr 22, 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 6 1 Updated Apr 22, 2026
  • ccte-api-chemical Public

    US EPA's CTX Chemical API, available at: https://comptox.epa.gov/ctx-api/docs/chemical.html

    USEPA/ccte-api-chemical’s past year of commit activity
    Java 5 MIT 3 26 (1 issue needs help) 0 Updated Apr 22, 2026
  • ccte-api-docs Public

    US EPA's CTX APIs Documentation

    USEPA/ccte-api-docs’s past year of commit activity
    HTML 0 1 0 0 Updated Apr 22, 2026
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