Science & Technology
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Risk-Screening Environmental Indicators (RSEI) Methodology Version 2.3.8
the document for Risk-Screening Environmental Indicators (RSEI) Methodology Version 2.3.8, December 2019
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Podcast: EPA OIG’s IIJA Oversight Plan
Podcast: EPA OIG’s IIJA Oversight Plan
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Region 8 Quality Management Plan
Region 8 Quality Management Plan effective 2020
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Peer Review of the Draft Risk Evaluation for Octamethylcyclotetrasiloxane (D4)
Information about the EPA's Peer Review of the risk evaluation for octamethylcyclotetrasiloxane (D4) under the Toxic Substances Control Act.
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Summary Table of Lifecycle Greenhouse Gas Emissions for Select Pathways
This document contains Livecycle Greenhouse Gas Emissions for Select Pathways.
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Clean Diesel Group LXF System
This page includes Letter from EPA to Clean Diesel Group LLC approves request for verification of CDG’s Low Oxides of Nitrogen Filter (LXF) System for highway application reducing emissions of certain criteria pollutants.
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Clean Diesel Group LNF System
This page includes Letter from EPA to Clean Diesel Group LLC approves request for verification of CDG’s Low Nitrogen Dioxide Filter (LNF) System for highway application reducing emissions of certain criteria pollutants.
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Instructions for Submitting Technology-Specific Information for Idling Reduction Technologies (IRTs) for Locomotives
This document contains instructions for submitting information in the Technology-Specific portion of the SmartWay Verification Process for IRTs for Locomotives.
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Draft Test Protocol for Idling Reduction Technologies (IRTs) for Trucks
This document contains test protocols for Truck IRTs as part of the SmartWay Verification Process.
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Background Documents on SmartWay Aerodynamics and Trailers
These documents provide information on SmartWay’s trailer and aerodynamic device program and how you can save fuel.
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Certification Template and Guidance Document for Electric Motorcycles
Template and guidance document for the certification process for electric motorcycles.
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Light-Duty: Family Naming Conventions
How to create Positions 5-12 of your Engine Family name for Light-Duty Durability Group.
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RadNet near-real-time air data
RadNet air monitoring results are now available on the RadNet Dashboard
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E15 Compatibility with UST Systems Statement
Review EPA's statement about the growth of fuel containing E15 and the compatibility of E15 with underground storage tank (UST) systems.
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Stationary Source Program Methods Format
Descriptions and formats for creating a method for the Office of Air Quality Planning and Standards Stationary Source Program.
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2016 Version 2 Technical Support Document
This TSD describes how the emission inventories were prepared for air quality modeling by the U.S. Environmental Protection Agency (EPA) for criteria air pollutants to represent the years of 2016, 2023 and 2028.
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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.