Science & Technology
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Greenhouse Gas Emissions Model (GEM) for Medium- and Heavy-Duty Vehicle Compliance
EPA’s Greenhouse Gas Emissions Model (GEM) is a free, desktop computer application that estimates the greenhouse gas (GHG) emissions and fuel efficiency performance of specific aspects of heavy-duty vehicles.
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StreamCat Metrics REST API
StreamCat Metrics REST API, documentation for the API that allows the return metrics from StreamCat data tables
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National Rivers and Streams Assessment 2018-19 Technical Support Document
PDF of the National Coastal Condition Assessment 2015 Technical Support Document.
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Ecoregional Results - National Wetland Condition Assessment 2021
Results for the National Lakes Assessment 2012, including key findings, national results, ecoregional results, and state highlights.
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Online Resources for CAMEO Users
A list of online resources for CAMEO users
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Sanitary Surveys for Recreational Waters
A sanitary survey is a tool that allows users to investigate the sources of pollution and conditions in a recreational water body. The EPA developed a free application to help waterbody managers conduct sanitary surveys and store their data.
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StreamCat Metrics and Definitions
The Stream-Catchment (StreamCat) dataset is an extensive collection of landscape metrics for 2.6 million streams and associated catchments within the conterminous U.S.
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Level III and IV Ecoregions by State
Information and links to downloadable maps and datasets for Level III and IV ecoregions, listed by state. Ecoregions are areas of general similarity in the type, quality, and quantity of environmental resources.
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What is the National Rivers and Streams Assessment?
The National Rivers and Streams Assessment (NRSA) is a statistical survey of the condition of our Nation’s rivers and streams.
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Small Drinking Water Systems Webinar Series
Schedule for EPA's Office of Research and Development and Office of Water's monthly webinar series: challenges and treatment solutions for small drinking water systems. Certificates of attendance offered for each webinar.
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U.S. Department of Energy, National Renewable Energy Laboratory: IT Sustainability Case Study
U.S. Department of Energy, National Renewable Energy Laboratory: IT Sustainability Case Study
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Cherokee County National Priorities List (NPL) Superfund Site, Cherokee County, Kansas - Fact Sheet, January 2023
Community Update - Sixth Five-Year Review Summary
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Interim Final Brownfields Quality Assurance Project Plan Template
March 2001 Brownfields quality assurance project plan template, a generic format to be used for generating a QAPP for Brownfields pilot projects in Region 3 and an addendum to the template.
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Benefits Reports for Air Pollution Regulations
This page contains links to information supporting benefits analyses prepared by OAQPS.
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Supply Chain Guidance
Find information on the steps an organization can take to reduce their supply chain emissions.
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EPA EcoBox Tools by Effects
Eco-Box is a toolbox for exposure assessors. Its purpose is to provide a compendium of exposure assessment and risk characterization tools that will present comprehensive step-by-step guidance and links to relevant exposure assessment data bases
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IRIS Public Science Meeting (Oct 2016)
This September 2016 public meeting is made available to solicit comments on the public comment draft of the IRIS Assessment of ETBE.
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Exposure Factors Handbook Chapter 3
Exposure Factors Handbook: 2011 Edition, Chapter 3:Ingestion of Water and Other Select Liquids. This update of chapter 3 provides newinformation on various physiological and behavioral factors commonly used in assessing exposure to environmental chemicals.
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Exposure Factors Interactive Resource for Scenarios Tool (ExpoFIRST)
Information about the Exposure Factors Handbook: 2011 Edition, including the history of the document, highlights documents, tables and spreadsheets, and more recent updates.
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ExpoKids: Background
ExpoKids allows for visualization of aggregate exposure estimates, produced by ExpoFIRST, across lifestages.