Science & Technology
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Community Health Vulnerability Index Provides Public Health Tool to Protect Vulnerable Populations from Impaired Air
New tool helps public health officials identify vulnerable populations at risk from wildland fire smoke exposure.
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Visual Environment for Rich Data Interpretation (VERDI) program for environmental modeling systems
VERDI is a flexible, modular, Java-based program used for visualizing multivariate gridded meteorology, emissions and air quality modeling data created by environmental modeling systems such as the CMAQ model and WRF.
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Research Topics
ORD's work is organized into six research programs that identify the most pressing environmental health research needs with input from Agency offices, partners, and stakeholders.
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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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NAMs Training: Contact Us
NAMS Training Catalog, providing information about recent and upcoming trainings and workshops.
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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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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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NAMs Training: Getting Started
NAMS Training Catalog, providing information about recent and upcoming trainings and workshops.
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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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Ambient Water Quality Tools
Tools that track water quality data and their impacts to the environment and human health.
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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.