Science & Technology
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Archives of Fast Facts: U.S. Transportation Sector Greenhouse Gas Emissions
This page contains archives of Fast Facts: U.S. Transportation Sector Greenhouse Gas Emissions.
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EPA Emission Standards for Light-Duty Vehicles and Trucks and Motorcycles
This page contains links to reference information for the Federal Emissions Standards of light-duty vehicles and engines.
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Federal and Nongovernmental Water Reuse Resources
Federal and Nongovernmental Water Reuse Resources
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2018 Science Matters Stories
Read EPA Science Matters stories published in 2018.
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Are BPA Substitutes Any Safer Than BPA?
Bisphenol A, known as “BPA” is an industrial chemical that can result in possible human health effects. Are substitutes any safer?
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EPA Researchers Evaluate Potential Aerosol Treatment Technologies to Reduce Virus in the Air
EPA researchers have been evaluating different types of aerosol treatment technologies that could potentially be used to reduce the amount of virus (or other pathogens) in the air in occupied spaces, for example in an office or school.
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Greenhouse Gases at EPA
This page discusses the two types of greenhouse gas emissions that EPA tracks and works to reduce.
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EPA Releases Updated New Approach Methodologies (NAMs) Work Plan
EPA released an updated New Approach Methods (NAMs) Work Plan to reduce the use of animals and revolutionize chemical testing.
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Mpox: Applying What We Know About Biological Agents to Prepare for Emerging Public Health Threats
EPA researchers have been studying the persistence of biological agents, including pox viruses, under various conditions for over a decade. Now it is being applied to help reduce the spread of the monkeypox virus.
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Where is more information available about emissions estimation methods used by the EPA?
For criteria air pollutants and precursors as well as for hazardous air pollutants, the methods are described in the technical support document (TSD) for the latest National Emissions Inventory (NEI) available from the main NEI page . For greenhouse gas emissions, you can find greenhouse gas inventory methods from the…
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How complete are the data in the National Emissions Inventory?
While the goal of the National Emissions Inventory (NEI) program is to include all emissions data, there are always challenges meeting this goal. The answer about completeness of coverage of sources depends on the emissions sector and pollutant. In general, the criteria air pollutants and precursors (CAPs) are expected to…
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What does an annual emissions value in the NEI represent (one year or multiple years)?
The NEI provides total annual emissions for a single year.
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How do I get access to the Emissions Inventory System?
Access to the Emissions Inventory System (EIS) is available to state, local, tribal agencies, their representatives (such as contractors), to multijurisdictional organizations (MJOs), and to EPA staff. The EIS is not available to the public. Instructions for access to the EIS is available in the Emissions Inventory System (EIS) User’s…
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How often are the NEI data updated and how frequently are the data published?
The full NEI is created for every third inventory year (e.g., 2008, 2011, 2014, and 2017). The data for each version has been updated two times each for the 2008, 2011, and 2014 NEI cycles. For the 2017 NEI and beyond, the EPA is trying to publish only a single…
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What are the units of NEI emissions data?
NEI emissions values represent total annual emissions for the inventory reporting year. Criteria air pollutants and precursors (CAPs) are reported in short tons per year , and hazardous air pollutants (HAPs) are reported in lbs per year .
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Where can I download hourly emissions data from continuous monitoring?
Hourly emissions data files are available from the Clean Air Markets Division of EPA, collected as part of 40 CFR Part 75. The download location has changed in February, 2023. The new location is https://campd.epa.gov/data/bulk-data-files . Once on this new site, use the menu (at the left) and the Keyword…
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How do I reset my password for the Emissions Inventory System?
Instructions for resetting your password are available in the Emissions Inventory System (EIS) User’s Manual and How To’s section on “How Do I Update My Password?” Follow the instructions to reset your password.
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Air Modeling - Reports and Journal Articles - Documents
Air Modeling - Reports and Journal Articles - Documents
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2022 Mitigation Bank and In-Lieu Fee Program Review Workbooks and Checklists
The Mitigation Bank and In-Lieu Fee Program Review Workbooks and Checklists were developed from the materials of the National Training course for mitigation banking and in-lieu fee program interagency review teams.
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RFC 24001 & RFR 24001A - Verification Analysis for PFAS in Pesticide Products
Documents related to the Request for Correction 24001 - Verification Analysis for PFAS in Pesticide Products