Science & Technology
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WhAEM2000 BBM Files - Hendersonville, North Carolina
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Hendersonville Quadrangle, North Carolina. Files serve as geographic basis for groundwater modeling.
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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.
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Indicators: Soil Chemistry
The chemical makeup of the soil can provide information on wetland condition, wetland water quality and services being provided by the wetland ecosystem. Analyzing soil chemistry reveals if the soil is contaminated with a toxic chemical or heavy metal.
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Indicators: Salinity
Salinity is the dissolved salt content of a body of water. Excess salinity, due to evaporation, water withdrawal, wastewater discharge, and other sources, is a chemical sterssor that can be toxic for aquatic environments.
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Indicators: Ecological Fish Tissue Contaminants
Fish tissue contaminants are indicators of toxic chemicals in the water. Mercury, PCBs, chlordane and DDT concentrate in fish and pose health risks to people and animals that consume them.
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Indicators: Macrophytes
Macrophytes are aquatic plants growing in or near water. They may be either emergent (i.e., with upright portions above the water surface), submerged, or floating. Examples of macrophytes include cattails, hydrilla, water hyacinth, and duckweed.
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National Rivers and Streams Assessment 2008-2009 Report
PDF of the NRSA 2008-2009 final report
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National Wetlands Condition Assessment 2021 Key Findings
key findings of the national lakes assessment report 2017
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Indicators: Environmental DNA
Fish tissue contaminants are indicators of toxic chemicals in the water. Mercury, PCBs, chlordane and DDT concentrate in fish and pose health risks to people and animals that consume them.
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Supporting Materials: Stakeholder Webinar: 2019 GHGI Public Review Estimates for Natural Gas & Petroleum Systems
GHGI Feb 2019 Stakeholder Meeting Supporting Materials
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U.S. Government’s International Methane Mitigation Activities: 2021 Accomplishments
The U.S. Government’s Global Methane Initiative Accomplishments ANNUAL REPORT (2021)
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U.S. Government’s International Methane Mitigation Activities: 2020 Accomplishments
The U.S. Government’s Global Methane Initiative Accomplishments ANNUAL REPORT (2020)
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Submitting Beach Data to EPA
Information on Submitting Data to BEACON
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Clean Water Act Aquatic Life Benchmarks for PFAS
Aquatic life benchmark values for eight individual per- and polyfluoroalkyl substances (PFAS) developed by the U.S. Environmental Protection Agency.
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Aquatic Life Criteria - Perfluorooctane Sulfonate (PFOS)
Aquatic Life Criteria for Perfluorooctane Sulfonate (PFOS)
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Aquatic Life Criteria - Perfluorooctanoic Acid (PFOA)
Aquatic Life Criteria for Perfluorooctanoic Acid (PFOA)
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Human Health Water Quality Criteria and Methods for Toxics
Documents pertaining to Human Health Water Quality Criteria and Methods for Toxins. Includes 2015 Update for Water Quality Criteria, 2002 National Recommended Human Health Criteria, and 2000 EPA Methodology.
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National Recommended Water Quality Criteria - Human Health Criteria Table
Criteria published pursuant to Section 304(a) of the Clean Water Act (CWA) to provide guidance for states and tribes to use in adopting water quality standards.