Science & Technology
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EPA Heavy-Duty Vehicle and Engine Greenhouse Gas Emissions Compliance Report
This page contains documents regarding heavy-duty vehicle and engine greenhouse gas compliance.
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Watt's Important? Seven Tips Every EV Driver Should Know!
Seven essential insights into EV charging options and tips to maximize the EV driving experience.
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Compliance and Fuel Economy Data for Vehicles and Engines
This emissions and fuel economy data is intended primarily for those interested in obtaining detailed data and in performing data analyses.
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Importing Vehicles and Engines into the United States
This site describes EPA emission regulations and requirements for importing motor vehicles, motor vehicle engines, heavy-duty on-highway engines, recreational vehicles, and nonroad engines.
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Emission Standards Reference Guide for On-road and Nonroad Vehicles and Engines
This is the Emission Standards Reference Guide, which contains federal emission standards for onroad and nonroad vehicles and engines, and related fuel sulfur standards.
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Johnson Matthey Technology—CEM™ Catalytic Exhaust Muffler and/or DCC™ Catalytic Converter
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Clean Diesel Technologies, Inc. – Purifilter EGR Diesel Particulate Filter (DPF)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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SmartWay Technology
This page provides information on SmartWay technology for locomotives, trucks, and school buses.
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SmartWay Designated Tractors and Trailers
This page provides information about SmartWay designated tractors and trailers and how to become one.
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Verified Technologies List for Clean Diesel
This list provides information about diesel retrofit technologies that EPA has approved or conditionally approved for use in engine retrofit programs.
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South Florida Ecosystem Assessment: Phase I/II Everglades Stressor Interactions: Hydropatterns, Eutrophication, Habitat Alteration, and Mercury Contamination
This project used a statistical survey design to sample the Everglades ecosystem from 1993-1999 for a multi-media suite of parameters.
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QUAL2EU
The Enhanced Stream Water Quality Model is maintained through the Watershed and Water Quality Modeling Technical Support Center and is no longer available on this website.
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Data Provisioning and Modeling Tools
Page linking to software tools, data, and documents.
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An Approach for Developing Site-Specific Lateral and Vertical Inclusion Zones within which Structures Should be Evaluated for Petroleum Vapor Intrusion due to Releases of Motor Fuel from Underground Storage Tanks
Review a graphical, data-driven approach to screen buildings for vulnerability to petroleum vapor intrusion.
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Modeling Products to Assess Exposures
A complete list of software models, modeling tools, data sets, and documents distributed by the EPA Center for Exposure Assessment Modeling (CEAM).
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BASINS Version History
Better Assessment Science Integrating Point and Nonpoint Sources (BASINS) version history shows the new features and changes to BASINS
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PRZM Version Index
Page on versions of PRZM, a one-dimensional, finite-difference model that accounts for pesticide and nitrogen fate in the crop root zone. PRZM3.12.3 is the most recent version.
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AQUATOX 3.1 Download Page
Contains AQUATOX system requirements and installation information. Download the zipped file. Order documentation.
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AQUATOX 3.2 Download Page
Contains AQUATOX system requirements and installation information. Download the zipped file. Order documentation.
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BASINS Framework and Features
BASINS enables users to efficiently access nationwide environmental databases and local user-specified datasets, apply assessment and planning tools, and run a variety of proven nonpoint loading and water quality models within a single GIS format.