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@USEPA

U.S. Environmental Protection Agency

Protecting Human Health and the Environment

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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 373 207

  2. CMAQ CMAQ Public

    Code for U.S. EPA’s Community Multiscale Air Quality Model (CMAQ) for estimating ozone, particulates, toxices, and deposition of acids and nutrients at neighborhood to global scales.

    Fortran 322 221

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

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

    C 291 199

Repositories

Showing 10 of 630 repositories
  • USEPA/climateBenefits’s past year of commit activity
    HTML 4 MIT 3 1 0 Updated Aug 18, 2025
  • 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 55 CC0-1.0 23 70 (7 issues need help) 2 Updated Aug 18, 2025
  • camd-eia-crosswalk Public

    A data crosswalk to integrate U.S. power sector emission and operation data from EPA to EIA

    USEPA/camd-eia-crosswalk’s past year of commit activity
    43 MIT 16 39 (1 issue needs help) 2 Updated Aug 18, 2025
  • AMET Public

    Code base for the U.S. EPA’s Atmospheric Model Evaluation Tool (AMET)

    USEPA/AMET’s past year of commit activity
    R 25 27 1 1 Updated Aug 18, 2025
  • haztrak Public

    Open-source waste management software, focused on interfacing with e-Manifest to track hazardous waste electronically

    USEPA/haztrak’s past year of commit activity
    Python 56 MIT 23 2 4 Updated Aug 18, 2025
  • spd-hfc-data-hub Public

    This repo contains the tables for the RY 2024 HFC Data Hub.

    USEPA/spd-hfc-data-hub’s past year of commit activity
    0 MIT 0 0 0 Updated Aug 18, 2025
  • 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 0 MIT 10 0 0 Updated Aug 18, 2025
  • 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 2 MIT 9,447 0 1 Updated Aug 17, 2025
  • CompTox-MIEML_HTTr Public

    Predicting Molecular Initiating Events from High Throughput Transcriptomics Data with Machine Learning

    USEPA/CompTox-MIEML_HTTr’s past year of commit activity
    HTML 0 3 0 0 Updated Aug 17, 2025
  • MCSimMod Public

    MCSim Models in R

    USEPA/MCSimMod’s past year of commit activity
    C 7 GPL-3.0 0 1 1 Updated Aug 16, 2025