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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 464 239

  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 368 234

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

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

    C 367 243

Repositories

Showing 10 of 699 repositories
  • pf_python_modelbuilding Public

    Python based code to create qsar models for WebTEST2.0 platform

    USEPA/pf_python_modelbuilding's past year of commit activity
    Python 2 2 0 0 Updated Oct 6, 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 76 CC0-1.0 29 153 (5 issues need help) 9 Updated Oct 6, 2026
  • webcms Public

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

    USEPA/webcms's past year of commit activity
    JavaScript 13 MIT 8 0 39 Updated Oct 6, 2026
  • pyTRIM_EPA Public
    USEPA/pyTRIM_EPA's past year of commit activity
    Python 2 0 0 0 Updated Oct 6, 2026
  • govchat Public Forked from Patrick-Davis-MSFT/chatbot-ui

    Customized GenAI chatbot interface for EPA employees

    USEPA/govchat's past year of commit activity
    TypeScript 6 MIT 9,628 0 0 Updated Oct 6, 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 Oct 6, 2026
  • spmodel Public

    spmodel: Spatial Statistical Modeling and Prediction in R

    USEPA/spmodel's past year of commit activity
    R 27 GPL-3.0 5 0 0 Updated Oct 6, 2026
  • hawc Public

    Captures key data for health assessment of chemicals and other environmental hazards

    USEPA/hawc's past year of commit activity
    Python 12 5 0 3 Updated Oct 6, 2026
  • csb-rebate-forms-app Public

    Code related to the U.S. EPA Clean School Bus (CSB) data collection system. Specifically, this repository provides code for the cloud.gov hosted CSB Rebate Forms Application (i.e., Applicant Dashboard).

    USEPA/csb-rebate-forms-app's past year of commit activity
    CSS 2 CC0-1.0 2 0 1 Updated Oct 6, 2026
  • TADAShiny Public

    TADAShiny is a R Shiny application (link to web version below) built on top of the TADA R Package (https://github.com/USEPA/TADA). It provides a user friendly, web accessible interface.

    USEPA/TADAShiny's past year of commit activity
    R 23 CC0-1.0 10 20 1 Updated Oct 6, 2026
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