Science & Technology
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Evaluating Options for Documenting Incremental Improvement of Impaired Waters Under the TMDL Program
The report documents scientifically sound examples of detecting and quantifying incremental improvement and summarizes the key concepts and methods in a consistent framework.
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Applying Results Findings: The Recovery Potential Project
The document describes a pilot study using the Illinois 303(d) listed waters, aimed at developing tools and data to help state TMDL and restoration programs decide where best to use their limited restoration resources.
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Download the 2023 Automotive Trends Report (previous year)
Download the 2023 Automotive fuel economy trends report.
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About the Automotive Trends Data
About the data for the light-duty vehicle carbon dioxide and fuel economy trends report.
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Introduction to the Automotive Trends Report
Introductory information for light-duty vehicle greenhouse gas (GHG) emissions, fuel economy, technology data, and auto manufacturers' performance in meeting EPA's GHG emissions standards.
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Highlights of the Automotive Trends Report
Highlights of the light-duty vehicle carbon dioxide and fuel economy trends report.
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Working Paper: Evaluating the Effectiveness of Voluntary Programs: Did Ohio's Tox-Minus Initiative Affect Participants' TRI Emissions?
This is a working paper titled "Evaluating the Effectiveness of Voluntary Programs: Did Ohio's Tox-Minus Initiative Affect Participants' TRI Emissions?"
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Contaminant Candidate List 5 - CCL 5
Learn about EPA's Contaminant Candidate List 5 (CCL 5)
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Contaminant Candidate List 4 - CCL 4
Learn about EPA's Contaminant Candidate List 4 (CCL 4)
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Contaminant Candidate List 3 - CCL 3
Learn about EPA's third Contaminant Candidate List (CCL 3)
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Drinking Water Contaminant Candidate List (CCL) and Regulatory Determination
Learn about EPA's drinking water Contaminant Candidate List and Regulatory Determinations.
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NAAQS Table
NAAQS Table
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Research Fellowships
This site supports fellowship competitions and tracks awarded projects and their results
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Clean Heavy-Duty Vehicles Program: Grantee Resources
This page contains resources for Clean Heavy-Duty Vehicles Grant Program prospective applicants on topics including eligible vehicles, workforce development, tax credits, and technical assistance.
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Timeline of Major Accomplishments in Transportation, Air Pollution, and Climate Change
See the major accomplishments in transportation, air pollution, and climate change.
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In-Use Testing Template for Large Nonroad Spark-Ignition (SI) Engine
Use this template to report for large nonroad spark-ignition engines.
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Large Nonroad Spark-Ignition Engines (>19 kiloWatts): Family Naming Conventions
How to create Positions 5-12 of your Engine Family name for Large Nonroad Spark-Ignition Engines (>19 kiloWatts).
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Complete Heavy-Duty Highway Vehicles (8,500 to 14,000 Pounds GVWR; Tested on Chassis Dynamometer): Family Naming Conventions
How to create Positions 5-12 of your Engine Family name for Complete Heavy-Duty Highway Vehicles (8,500 to 14,000 pounds GVWR; tested on chassis dynamometer).
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Presentation on Onroad Electric Motorcycle and Portable Fuel Container for Engines and Vehicles Compliance Information System (EV-CIS), formerly Verify, Module Deployment
This presentation provides information about electric motorcycles and portable fuel container EV-CIS module deployment.
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Heavy-Duty Evaporative Families: Family Naming Conventions
How to create Positions 5-12 of your Engine Family name for Heavy-Duty Evaporative Families.