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    655 repositories

    • IntraCMS

      Public
      US EPA Intranet CMS
      phpdrupaloms
      CSS
      •
      MIT License
      •3•6•0•0•Updated Oct 13, 2025Oct 13, 2025

    • egrid

      Public
      Emissions & Generation Resource Integrated Database (eGRID)
      oaregrid
      R
      •
      MIT License
      •9•21•11•0•Updated Oct 13, 2025Oct 13, 2025

    • 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
      Creative Commons Zero v1.0 Universal
      •2•3•0•0•Updated Oct 13, 2025Oct 13, 2025

    • code-json-generator

      Public
      Automation that scrapes USEPA github and provides that metadata for code.gov
      oms
      JavaScript
      •
      MIT License
      •10•1•0•0•Updated Oct 13, 2025Oct 13, 2025

    • webcms

      Public
      Content management system for EPA's flagship website, www.epa.gov
      awsterraformomsdrupal-10
      JavaScript
      •9•12•0•27•Updated Oct 13, 2025Oct 13, 2025

    • SSN2

      Public
      SSN2: Spatial Modeling on Stream Networks in R
      R
      •
      GNU General Public License v3.0
      •7•24•0•0•Updated Oct 11, 2025Oct 11, 2025

    • campdRShinyDataSource

      Public
      R
      •
      MIT License
      •2•3•0•0•Updated Oct 11, 2025Oct 11, 2025

    • govchat

      Public
      Customized GenAI chatbot interface for EPA employees
      nextjsomsgenaigenai-chatbot
      TypeScript
      •
      MIT License
      •9.4k•2•0•0•Updated Oct 10, 2025Oct 10, 2025

    • 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
      ow
      PLpgSQL
      •
      Creative Commons Zero v1.0 Universal
      •2•5•0•0•Updated Oct 10, 2025Oct 10, 2025

    • EnviroAtlas_v4

      Public
      EnvrioAtlas migration to JS4. Easy to use, interactive mapping application to access hundreds of maps showing environmental data
      ord
      Jupyter Notebook
      •
      MIT License
      •0•1•0•0•Updated Oct 10, 2025Oct 10, 2025

    • harmonize-wq

      Public
      Standardize, clean, and wrangle Water Quality Portal data into more analytic-ready formats
      ord
      Python
      •
      MIT License
      •9•18•23•4•Updated Oct 10, 2025Oct 10, 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.
      ow
      R
      •
      Creative Commons Zero v1.0 Universal
      •23•60•92•2•Updated Oct 10, 2025Oct 10, 2025

    • CompTox-ToxCast-tcpl

      Public
      US EPA's Toxicity Forecaster (ToxCast) Pipeline. More information on the ToxCast program available here: https://www.epa.gov/comptox-tools/toxicity-forecasting-toxcast
      ordcctecomptox
      R
      •
      Other
      •19•40•30•1•Updated Oct 10, 2025Oct 10, 2025

    • SDAM-web-app

      Public
      Web Application for the Regional Streamflow Duration Assessment Methods (SDAMs)
      ow
      R
      •
      MIT License
      •2•2•0•0•Updated Oct 10, 2025Oct 10, 2025

    • SuRGE

      Public
      Code to reproduce the data files described in "Summertime methane and carbon dioxide emission rates and associated variables from a national-scale survey of 146 reservoirs in the United States" to be submitted to Limnology and Oceanography Letters in July 2025. The project was led by the US EPA's Office of Research and Development.
      ord
      HTML
      •
      MIT License
      •1•0•10•0•Updated Oct 9, 2025Oct 9, 2025

    • ccte-api-exposure

      Public
      Part of CCTE Public API
      Java
      •
      MIT License
      •1•0•12•0•Updated Oct 9, 2025Oct 9, 2025

    • ctxR

      Public
      US EPA's ctxR: Utilities for Interacting with the CTX APIs in R without prior API knowledge https://www.epa.gov/comptox-tools/computational-toxicology-and-exposure-apis
      ordcctecomptox
      R
      •
      GNU General Public License v3.0
      •9•15•7•0•Updated Oct 9, 2025Oct 9, 2025

    • ShinyVB

      Public
      Shiny version of Virtual Beach
      R
      •
      Apache License 2.0
      •1•0•0•0•Updated Oct 9, 2025Oct 9, 2025

    • StreamCatTools

      Public
      R package to work with the StreamCat API within R and access the full suite of StreamCat catchment and watershed scale metrics for all NHDPlusV2 stream reaches and catchments.
      streamcat
      R
      •
      Creative Commons Zero v1.0 Universal
      •10•37•12•0•Updated Oct 9, 2025Oct 9, 2025

    • camd-eia-crosswalk

      Public
      A data crosswalk to integrate U.S. power sector emission and operation data from EPA to EIA
      oaregrid
      MIT License
      •16•49•38•1•Updated Oct 9, 2025Oct 9, 2025

    • flowsa

      Public
      Library that attributes resource use, waste, emissions, and loss to economic sectors
      ord
      Python
      •
      MIT License
      •24•34•26•0•Updated Oct 8, 2025Oct 8, 2025

    • BMDS

      Public
      U.S EPA Benchmark Dose Modeling Software (BMDS)
      toxicologyrisk-assessmentdose-response-modelingorddose-response
      C++
      •
      MIT License
      •4•5•0•0•Updated Oct 8, 2025Oct 8, 2025

    • DissolvedGasNla

      Public
      ord
      HTML
      •
      MIT License
      •1•2•1•0•Updated Oct 8, 2025Oct 8, 2025

    • 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).
      CSS
      •
      Creative Commons Zero v1.0 Universal
      •2•2•0•1•Updated Oct 8, 2025Oct 8, 2025

    • FrEDI

      Public
      FrEDI estimates annual physical and economic impacts from temperature to the U.S., through the 21st century
      oar
      HTML
      •
      Other
      •17•15•2•0•Updated Oct 8, 2025Oct 8, 2025

    • standardizedinventories

      Public
      Standardized Release and Waste Inventories
      ord
      Python
      •
      MIT License
      •23•27•10•1•Updated Oct 8, 2025Oct 8, 2025

    • RAQSAPI

      Public
      A R extension to retrieve EPA Air Quality System Data via the AQS Data Mart API
      environmental-monitoringdatamartrprogrammingrpackageaqsusepar03environmental-data-retrievalairmonitoring
      R
      •
      Other
      •7•24•3•0•Updated Oct 7, 2025Oct 7, 2025

    • hwip

      Public
      Hazardous Waste Information Platform
      2•3•0•1•Updated Oct 7, 2025Oct 7, 2025

    • ccte-api-chemical

      Public
      Code for chemical microservice used in CCTE APIs
      ordccte
      Java
      •
      MIT License
      •2•3•40•0•Updated Oct 7, 2025Oct 7, 2025

    • pybeepop

      Public
      EPA's Python wrapper for the EPA/USDA honey bee colony model BeePop+
      Jupyter Notebook
      •
      MIT License
      •3•2•3•0•Updated Oct 6, 2025Oct 6, 2025
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