Science & Technology
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Caterpillar Technology—Emissions Upgrade Group (model 3306)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Wildfires
EPA provides resources about how to reduce smoke exposure and protect your health during wildland fire smoke events.
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Six-Year Review 3 of Drinking Water Standards
Read the summary of EPA's Six-Year Review 2 of existing drinking water standards and learn about the four regulatory revision candidates
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Types of Drinking Water Contaminants
Description and examples of categories of drinking water contaminants
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Perchlorate in Drinking Water
Perchlorate is a naturally occurring and manufactured chemical anion. On February 11, 2011, EPA determined that perchlorate meets the Safe Drinking Water Act criteria for regulation as a contaminant.
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Six-Year Review 2 of Drinking Water Standards
Read the summary of EPA's Six-Year Review 2 of existing drinking water standards and learn about the four regulatory revision candidates
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Remediating and Reducing PFAS in Fire Suppression Systems
The EPA offers free public webinars on recent research results. Watch a pre-recorded webinar about cleanup guidance for remediating PFAS contaminated foam delivery systems, specifically those in hangars and Aircraft Rescue and Firefighting vehicles.
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Agriculture Success Stories
EPA is committed to promoting success stories and strong partnerships with the agriculture community to assist in fulfilling our mission of protecting human health and the environment.
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Southern Appalachians Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Southern Appalachians ecoregion
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Northern Plains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Northern Plains ecoregion
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Coastal Plains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Coastal Plains ecoregion
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Ecoregional Results - National Lakes Assessment 2022
Results for the National Lakes Assessment 2012, including key findings, national results, ecoregional results, and state highlights.
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Reports and Data - National Lakes Assessment 2022
Products from the national lakes assessment 2017 including report, technical report, factsheet, data files, and data dashboard
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Southern Plains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Southern Plains ecoregion
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Temperate Plains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Temperate Plains ecoregion
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Xeric Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Xeric ecoregion
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Western Mountains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Western Mountains ecoregion
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National Results and Regional Highlights - National Lakes Assessment 2012
NLA 2012 Report and Regional Highlights
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What is the National Lakes Assessment?
The National Lakes Assessment is a collaborative, statistical survey of the nation's lakes. It is one of four national surveys that EPA and its partners conduct to assess the condition and health of the nation's water resources.
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National Coastal Condition Assessment 2020 Manuals
National Coastal Condition Assessment 2020 Manuals including field, lab etc.