Science & Technology
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Description of Changes in Climatic Indices in USA over 25 Years (1989 – 2013)
This report concentrates on the methodology and potential future uses for long-term climate factor trends, and trends of derived climatic factors and indices.
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Frequently Asked Questions and Terms
Frequently Asked Questions of the EPA OIG including explanations of commonly used terms like audit, investigation and more.
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Action Update: EPA Identifies the Spilled Chemical Compound in Garnett, Kansas
U.S. Environmental Protection Agency (EPA) has identified the chemical compound spilled in Garnett, Kansas, on Dec. 31, 2025.
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Addressing Nonpoint Source Pollution through EPA’s National Nonpoint Source Program Webcast
Nonpoint source pollution webcast
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Watershed Academy Webcast: EPA Releases First Ever National Wetland Condition Assessment
Presentation from June 16, 2016 webcast.
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Slide Deck: State Legislation on Ocean & Coastal Acidification Webinar
State Legislation on Ocean & Coastal Acidification Slide Deck
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How's My Waterway January 2022 Webcast
How’s My Waterway has added several new features over the past year that will be featured in this webcast.
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Using EPA’s EnviroAtlas and Recovery Potential Screening Tools to Support Sound Decision Making
Webcast, Using EPA’s EnviroAtlas and Recovery Potential Screening Tools to Support Sound Decision Making
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Building Resilience in Partnership with Vulnerable Communities
This webinar will look at the factors that contribute to vulnerability and provide examples of how EPA and its partner programs have effectively worked to help build resilience with vulnerable communities.
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Lead (Pb) Overview and Data Mapping Webinar Archive
This EPA Tools & Resources webinar provides an overview of the Administration priorities for lead (Pb) and a detailed look at a multimedia data mapping approach available for states and partners to use to identify potential lead exposures.
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References
This is a list of references.
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Hemispheric Scale Applications
Air quality is a global issue since air pollutants can be transported between countries and even continents. CMAQ can be used over a domain covering the entire northern hemisphere, providing information on interactions occurring at various spatial scales
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Contacts for Los Angeles River Watershed (California)
Contacts and emails addresses for the Los Angeles River Watershed location
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SAM Companion Documents
SAM Companion Documents and Sample Collection Procedures provide information intended to complement the analytical methods listed in Selected Analytical Methods for Environmental Remediation and Recovery (SAM).
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SAM 2022 Biotoxin Method Summary
Selected Analytical Methods.
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SAM 2022 Biotoxin Methods Query Results
Selected Analytical Methods
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SAM 2022 Chemical Determinative Method Summary
Selected Analytical Methods.
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Safety and Waste Management for SAM Radiochemical Methods
The General Safety and Waste Management page offers section-specific safety and waste management details for the radiochemical analytes included in EPA's Selected Analytical Methods for Environmental Remediation and Recovery (SAM).
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ESAM Collaborative Analytical Methods and Protocols for Radiochemistry
HSRP has worked with various partners to develop and test analytical methods and protocols for use by laboratories charged with analyzing environmental and/or buildling material samples following contamination incident.
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Memoranda Associated with the Second External Review Draft of Health Risk and Exposure Assessments from the Ozone NAAQS Review Completed in 2015
EPA's Health and Environmental Impacts Division had to make corrections to some of the risk results included in earlier drafts of the Health Risk and Exposure Assessment from the current review of ozone national ambient air quality standards (NAAQS).