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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:

  • 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

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  1. WNTR WNTR Public

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

    Python 406 214

  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 316 211

Repositories

Showing 10 of 664 repositories
  • IntraCMS Public

    US EPA Intranet CMS

    USEPA/IntraCMS’s past year of commit activity
    CSS 6 MIT 3 0 0 Updated Jan 20, 2026
  • RAQSAPI Public

    A R extension to retrieve EPA Air Quality System Data via the AQS Data Mart API

    USEPA/RAQSAPI’s past year of commit activity
    R 26 8 3 0 Updated Jan 20, 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 63 CC0-1.0 23 95 (7 issues need help) 2 Updated Jan 20, 2026
  • invitroTKdata Public

    This is an R data package containing a collection of in vitro toxicokinetic datasets (related to manuscripts) processed with the invitroTKstats R package.

    USEPA/invitroTKdata’s past year of commit activity
    R 0 0 1 0 Updated Jan 20, 2026
  • OW_Survey_Design_Tool Public

    This R Shiny app presents an easy-to-use user interface for the calculation of spatially balanced survey designs of point, linear, or areal resources (i.e. lakes, streams, wetlands and coastal resources) using the Generalized Random-Tessellation Stratified (GRTS) algorithm.

    USEPA/OW_Survey_Design_Tool’s past year of commit activity
    R 8 MIT 3 0 0 Updated Jan 20, 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 20, 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 19, 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 5 CC0-1.0 2 0 0 Updated Jan 19, 2026
  • campdRShinyDataSource Public
    USEPA/campdRShinyDataSource’s past year of commit activity
    R 3 MIT 2 0 0 Updated Jan 19, 2026
  • MCSimMod Public

    MCSim Models in R

    USEPA/MCSimMod’s past year of commit activity
    C 9 GPL-3.0 0 0 1 Updated Jan 18, 2026
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