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    678 repositories

    • NEP-Water-Quality

      Public
      Code used for filtering, QAing, and visualizing monitoring data from NEP sites for ocean acidification and water quality analysis
      R
      •3•2•0•0•Updated Apr 2, 2026Apr 2, 2026

    • webcms

      Public
      Content management system for EPA's flagship website, www.epa.gov
      awsterraformoms
      awsterraformomsdrupal-10
      JavaScript
      •8•13•0•42•Updated Apr 2, 2026Apr 2, 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 lake…
      ow
      ow
      R
      •
      Creative Commons Zero v1.0 Universal
      •26•71•126•2•Updated Apr 2, 2026Apr 2, 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, …
      R
      •
      Creative Commons Zero v1.0 Universal
      •0•1•3•1•Updated Apr 2, 2026Apr 2, 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, …
      ow
      ow
      R
      •
      Creative Commons Zero v1.0 Universal
      •8•20•19•0•Updated Apr 2, 2026Apr 2, 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 Form…
      CSS
      •
      Creative Commons Zero v1.0 Universal
      •2•2•0•1•Updated Apr 2, 2026Apr 2, 2026

    • code-json-generator

      Public
      Automation that scrapes USEPA github and provides that metadata for code.gov
      oms
      oms
      JavaScript
      •
      MIT License
      •9•2•0•0•Updated Apr 2, 2026Apr 2, 2026

    • IntraCMS

      Public
      US EPA Intranet CMS
      phpdrupaloms
      phpdrupaloms
      CSS
      •
      MIT License
      •3•7•0•0•Updated Apr 1, 2026Apr 1, 2026

    • LCMRL_calculator

      Public
      OW/OGWDW/SRMD/TSB - This repository contains the code and instructions for using the LCMRL calculator
      ow
      ow
      4•4•0•0•Updated Apr 1, 2026Apr 1, 2026

    • pybeepop

      Public
      EPA's Python wrapper for the EPA/USDA honey bee colony model BeePop+
      Python
      •
      MIT License
      •3•8•1•0•Updated Apr 1, 2026Apr 1, 2026

    • govchat

      Public
      Customized GenAI chatbot interface for EPA employees
      nextjsomsgenai
      nextjsomsgenaigenai-chatbot
      TypeScript
      •
      MIT License
      •9.4k•5•0•0•Updated Apr 1, 2026Apr 1, 2026

    • ExpertQueryTMDLDashboard

      Public
      The ExpertQueryTMDLDashboard is an R Shiny application designed to summarize and count TMDLS based on user inputs to filters on various fields including state, …
      HTML
      •
      Creative Commons Zero v1.0 Universal
      •0•0•0•0•Updated Apr 1, 2026Apr 1, 2026

    • Free-Chlorine-Estimator-for-Dichlor-and-Trichlor-Systems

      Public
      Free Chlorine Estimator for Dichlor and Trichlor Systems (FCEDTS) Source Code
      rresearchshiny
      rresearchshinyorddrinking-waterdisinfectionequilibrium-modelsusepa
      CSS
      •
      MIT License
      •3•2•0•0•Updated Apr 1, 2026Apr 1, 2026

    • TADAShinyAnalyze

      Public
      ow
      ow
      R
      •
      Creative Commons Zero v1.0 Universal
      •0•1•7•1•Updated Apr 1, 2026Apr 1, 2026

    • gflow1

      Public
      Fortran
      •
      MIT License
      •6•3•5•1•Updated Apr 1, 2026Apr 1, 2026

    • WNTR

      Public
      An EPANET compatible python package to simulate and analyze water distribution networks under disaster scenarios.
      pythonresearchsimulation
      pythonresearchsimulationmodelingwaterord
      Python
      •
      Other
      •225•422•36•1•Updated Mar 31, 2026Mar 31, 2026

    • pf_python_modelbuilding

      Public
      Python based code to create qsar models for WebTEST2.0 platform
      Python
      •2•2•0•0•Updated Mar 31, 2026Mar 31, 2026

    • bmi_stream_lake_model

      Public
      Modeling of stream and lake temperatures and macroinvertebrate composition
      R
      •0•0•0•0•Updated Mar 31, 2026Mar 31, 2026

    • 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-expos…
      apiresearchctx
      apiresearchctxordcctecomptox
      R
      •
      GNU General Public License v3.0
      •9•21•7•0•Updated Mar 31, 2026Mar 31, 2026

    • ICRP113_pedfluoro

      Public
      0•1•0•0•Updated Mar 31, 2026Mar 31, 2026

    • harmonize-wq

      Public
      Standardize, clean, and wrangle Water Quality Portal data into more analytic-ready formats
      researchord
      researchord
      Python
      •
      MIT License
      •10•18•25•4•Updated Mar 31, 2026Mar 31, 2026

    • cam-api-portal

      Public
      Api for data collected to run programs designed to reduce air pollution from power plants
      oar
      oar
      JavaScript
      •
      MIT License
      •5•5•35•6•Updated Mar 31, 2026Mar 31, 2026

    • HAPEM

      Public
      HAPEM estimates inhalation exposure for selected population groups to various air toxics. The model makes use of ambient air concentration data, indoor/outdoor …
      0•1•0•0•Updated Mar 30, 2026Mar 30, 2026

    • Water_Treatment_Models

      Public
      Predicting water treatment unit operation effectiveness
      researchord
      researchord
      Python
      •
      MIT License
      •36•40•1•0•Updated Mar 30, 2026Mar 30, 2026

    • rExpertQuery

      Public
      An R package designed for retrieving ATTAINS data efficiently via Expert Query web services.
      ow
      ow
      HTML
      •
      Creative Commons Zero v1.0 Universal
      •5•8•5•0•Updated Mar 30, 2026Mar 30, 2026

    • ORD_SAB_Model

      Public
      Repository for the ORD developed model for water system service area boundaries.
      HTML
      •
      MIT License
      •7•26•0•0•Updated Mar 30, 2026Mar 30, 2026

    • EPANETMSX

      Public
      Program to model water quality problems
      researchord
      researchord
      C
      •
      MIT License
      •17•15•1•0•Updated Mar 30, 2026Mar 30, 2026

    • BMDS

      Public
      U.S EPA Benchmark Dose Modeling Software (BMDS)
      researchtoxicologyrisk-assessment
      researchtoxicologyrisk-assessmentdose-response-modelingorddose-response
      C++
      •
      MIT License
      •6•8•2•1•Updated Mar 30, 2026Mar 30, 2026

    • TEVA-SPOT-GUI

      Public archive
      DEPRECATED - This is a repository for the distribution of the TEVA-SPOT-GUI software
      researchordteva-spot
      researchordteva-spotteva-spot-gui
      R
      •6•6•0•0•Updated Mar 27, 2026Mar 27, 2026

    • CANARY

      Public archive
      DEPRECATED - Tool for finding events in water quality metrics
      researchord
      researchord
      Java
      •
      GNU Lesser General Public License v2.1
      •5•8•0•0•Updated Mar 27, 2026Mar 27, 2026
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