Science & Technology
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How are emissions trends compiled?
For criteria air pollutants and precursors, the emissions trends are based on the triennial National Emissions Inventory data, with some interim year data included for non-triennial years. The methods and interim-year approaches are described on the “Development of Data” tab included with the data provided on the Air Pollutant Emissions…
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WhAEM2000 BBM Files - Hebgen Lake, Wyoming
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Hebgen Lake Quadrangle, Wyoming. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Evanston, Wyoming
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Evanston Quadrangle, Wyoming. Files serve as geographic basis for groundwater modeling.
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WebICE Recent Additions
Web-based Interspecies Correlation Estimation application updates: Species Sensitivity Distribution modules for wildlife/aquatic species now include selection of multiple surrogate species.
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WhAEM2000 BBM Files - South Pass, Wyoming
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for South Pass Quadrangle, Wyoming. Files serve as geographic basis for groundwater modeling.
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EPA EcoBox Tools by Receptors
Eco-Box is a toolbox for exposure assessors. Its purpose is to provide a compendium of exposure assessment and risk characterization tools that will present comprehensive step-by-step guidance and links to relevant exposure assessment data bases
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WhAEM2000 BBM Files - Yellowstone National Park South, Wyoming
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Yellowstone National Park South Quadrangle, Wyoming. Files serve as geographic basis for groundwater modeling.
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EPA EcoBox Tools by Exposure Pathways
Eco-Box is a toolbox for exposure assessors. Its purpose is to provide a compendium of exposure assessment and risk characterization tools that will present comprehensive step-by-step guidance and links to relevant exposure assessment data bases
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EPA EcoBox Tools by Stressors
Eco-Box is a toolbox for exposure assessors. Its purpose is to provide a compendium of exposure assessment and risk characterization tools that will present comprehensive step-by-step guidance and links to relevant exposure assessment data bases
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WhAEM2000 BBM Files - Worland, Wyoming
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Worland Quadrangle, Wyoming. Files serve as geographic basis for groundwater modeling.
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Third-Party Certifications
Oil and Gas Alternative Test Method page - Super Emitter
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Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Standards - Federal Register Notices from Current Review
Federal Register notices used to review and develop a new Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) secondary standards.
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Risk Assessment for Other Effects
Risk Assessment for Noncancer Effects
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PCE Former Dry Cleaner Superfund Site, Atlantic, Cass County, Iowa - Fact Sheet, November 2020
Record of Decision Signed
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Syntex Facility National Priorities List (NPL) Superfund Site, Verona, Lawrence County, Missouri - Supplemental Information, December 2020
Addendum to Site Update – Completion of Private Well Testing
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Chinook Salmon
An assessment of Chinook salmon abundance in the Salish Sea. Part of the U.S. EPA and Environment and Climate Change Canada's Health of the Salish Sea Ecosystem Report.
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Marine Species at Risk
An assessment of marine species at risk of extinction in the Salish Sea watershed. Part of the U.S. EPA and Environment and Climate Change Canada's Health of the Salish Sea Ecosystem Report.
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Water Sampling and Testing for Formaldehyde at Northwest Fish Hatcheries
Report on concentrations of formaldehyde discharged from 10 federal and state fish hatcheries in Washington and Idaho after applications of formalin.
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Northwest Water Quality Temperature Guidance for Salmon, Steelhead and Bull Trout
EPA's guidance and supporting documents to assist Pacific Northwest states and tribes in adopting water quality standards for temperature.
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Indicators Used in the National Aquatic Resource Surveys
National Aquatic Resource Surveys use biological, physical, chemical and recreational indicators of water quality.