Skip to content
@USEPA

U.S. Environmental Protection Agency

Protecting Human Health and the Environment
README.md

27874383918_9e9df28bd2_k

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

Pinned Loading

  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
  • power-profiler Public

    Code used to develop eGRID's Power Profiler

    USEPA/power-profiler’s past year of commit activity
    Vue 24 MIT 7 34 6 Updated Jan 21, 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 23 103 (7 issues need help) 5 Updated Jan 21, 2026
  • webcms Public

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

    USEPA/webcms’s past year of commit activity
    JavaScript 12 9 0 30 Updated Jan 21, 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 21, 2026
  • invitrotkstats_dataproc Public

    Data processing scripts for manuscript datasets using the invitroTKstats R package.

    USEPA/invitrotkstats_dataproc’s past year of commit activity
    HTML 0 0 1 0 Updated Jan 21, 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 21, 2026
  • invitroTKstats Public

    Data processing pipeline R package for in vitro HTTK data (raw MS data to HTTK physiological parameters), including both frequentist and Bayesian estimates.

    USEPA/invitroTKstats’s past year of commit activity
    R 2 0 1 0 Updated Jan 21, 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 21, 2026
  • IntraCMS Public

    US EPA Intranet CMS

    USEPA/IntraCMS’s past year of commit activity
    CSS 6 MIT 3 0 0 Updated Jan 21, 2026
  • TADACommunityHub Public

    A collaborative hub where TADA users share and maintain information for custom workflows (e.g., state, tribal, territory, EPA, or other entities). For example, it includes user-contributed criteria and methodologies templates to support reproducible and efficient analyses.

    USEPA/TADACommunityHub’s past year of commit activity
    R 1 CC0-1.0 0 2 1 Updated Jan 21, 2026
View all repositories