Science & Technology
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Managing the Quality of Environmental Data at EPA Region 4
Information from Region 4 about managing the quality of environmental information
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Accelerating the Pace of Chemical Risk Assessment (APCRA)
Page describing EPA's role in the APCRA collaborative effort
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New Approach Methods Training - 2025 Society of Toxicology Satellite Meeting
NAMs Training at the 2025 SOT Annual Meeting
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Assessing Chemical Process Sustainability with GREENSCOPE
GREENSCOPE is a sustainability assessment tool used to evaluate and assist in the design of chemical processes. The goal is to minimize resource use, prevent or reduce releases, and increase the economic feasibility of a chemical process.
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Endocrine Disruption: Human Health Research
Endocrine disrupting chemicals can affect a range of hormonal systems in ways that interrupt multiple important systems in the body.
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NAMs Tools Training Workshop 2024
New Approach Methods (NAMs) Workshop planned for April 2024 in RTP, North Carolina.
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User’s Guide for the Chemical Transformation Simulator (CTS)
The CTS User’s Guide is designed to provide first-time users a complete understanding of how to utilize the CTS tool.
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NAMs Training: Contact Us
NAMS Training Catalog, providing information about recent and upcoming trainings and workshops.
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Indoor Semi-volatile Organic Compounds (i-SVOC) Version 1.0
i-SVOC Version 1.0 is a general-purpose software application for dynamic modeling of the emission, transport, sorption, and distribution of semi-volatile organic compounds (SVOCs) in indoor environments.
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What is the National Wetland Condition Assessment?
The National Wetland Condition Assessment (NWCA) is a statistical survey of the condition of our Nation’s wetlands.
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Reports and Data - National Rivers and Streams Assessment 2013-2014
Products from the national rivers and streams assessment 2013-2014 including report, technical report, factsheet, data files, and data dashboard
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National Lakes Assessment 2007 Results
The National Lakes Assessment samples over 1,000 lakes, ponds and reservoirs across the country. Key findings from this assessment in 2007 include the biological condition and most widespread stressors of these waterbodies.
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Indicators: Dissolved Oxygen
Dissolved oxygen (DO) is the amount of oxygen that is present in water. It is an important measure of water quality as it indicates a water body's ability to support aquatic life. Water bodies receive oxygen from the atmosphere and from aquatic plants.
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Indicators: Acidification
Acidification is a broad term that refers to the process by which aquatic ecosystems become more acidic. Acid rain and acid mine drainage are major sources of acidifying compounds, lowering the pH below the range where most living organisms function.
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Water Quality Framework
A framework for streamlining water quality assessment and reporting by integrating existing systems.
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National Rivers and Streams Assessment
The NRSA is a collaborative, statistical survey of the nation's rivers and streams. 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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Fish Images to Use with Fish Advisories
The U.S. Environmental Protection Agency developed a set of images to convey fish parts that should not be eaten to reduce possible exposure to chemicals among fish-eating populations.
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Summary of United States Mercury Emissions for Annex D Source Categories - year 2002-2022
This file contains the Summary of United States Mercury Emissions for Annex D Source Categories for the year 2018 as part of reporting under Article 8 of the Minamata Convention on Mercury.
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Washington County Lead District - Furnace Creek Superfund Site, Washington County, Missouri - Fact Sheet, June 2016
EPA Conducting Remedial Investigation and Feasibility Study, Operable Units 1, 2, 3 and 4
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Webinar: Innovative and Emerging Landfill Gas Energy Project Types
LMOP webinar on September 14, 2021 about the use of landfill gas for producing hydrogen, methanol and ethanol.