Science & Technology
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Locating the Vehicle Emissions Label
The images on this page show how to locate the vehicle emissions label used for model year vehicles produced before and after 2007.
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How to Obtain a Copy of a Certificate of Conformity for a Light-duty Vehicle (car, truck, or motorcycle)
Information on how to obtain a copy of Certificate of Conformity for a light-duty vehicle.
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Donaldson Technology—Series 6100 Diesel Oxidation Catalyst (DOC)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Various Technology—Cetane Enhancers
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Nett Technologies, Inc.—MD300 Diesel Oxidation Catalyst (DOC)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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MJ EcoPower Hybrid Systems, Inc.—EcoCrane Hybrid System
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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DonaldsonTechnology—Series 6000 Diesel Oxidation Catalyst (DOC) & Spiracle Closed Crankcase Filtration system
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Clean Diesel Technologies, Inc. – Purifilter Plus M DPF
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Clean Diesel Technologies, Inc. – Purifilter - Diesel Particulate Filter (DPF)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Clean Diesel Technologies, Inc. – AZC Purimuffler or AZC Purifier Diesel Oxidation Catalyst (DOC) plus CDTi Closed Crankcase Ventilation (CCV) System
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Various Technology—Biodiesel (1-100%)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Shared Mobility
This page is general overview of shared mobility, with explanations of carsharing, micromobility, ridehailing, and microtransit.
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SmartWay High Performer Lists
This page contains a list of the all of the types of high performing SmartWay partners that are recognized by EPA.
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Revised Final Determination and Settlement Agreement in Genscape, Inc. v. EPA 19-3705 (6th Cir.)
9 questions about Quality Assurance Program on revoking Genscape RINs are answered.
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Certification for Electric Motorcycles
Steps for certifying an electric nonroad motorcycle with EPA.
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AirData: Air Quality Data Collected at Outdoor Monitors Across the US
This site provides air quality data collected at outdoor monitors across the United States, Puerto Rico, and the U. S. Virgin Islands. Users can download, view or visualize the data.
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About Coastal Areas
This is about the coastal adaptation tools which includes the Adaptation Design (ADT Tool), and the SLAMM model.
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About Watersheds
This page is about the 20-watersheds report.
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Web Application Development Requirements
Links to guidance, style guides and templates for web development at EPA
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WATERS (Watershed Assessment, Tracking & Environmental Results System)
A system that unites water quality information from several independent and unconnected databases.