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At least four polyfluorinated organic substances (i.e., 4:2-, 6:2-, 8:2- and 10:2- fluorotelomer alcohols; FTOHs) have sufficient vapor pressure (VP) to be designated as vapor-forming chemicals. Based on current guidance, vapor-forming chemicals warrant investigation for vapor in...

Anthropogenic emissions of nitrogen (N) and sulfur (S) to the atmosphere from sources such as fossil fuel combustion and industrialized agriculture have increased atmospheric deposition of N and S several times over preindustrial levels in most developed nations. Recent efforts t...

Historical mining commonly left a legacy of environmental impairment that affected associated ecosystems. Remediation of legacy mine sites aims to restore water, soil, and sediment compositions to concentrations that are in compliance with relevant regulatory guide lines. A conse...

Air pollutants have a negative impact on plant growth, primarily through interfering with resource accumulation. Once leaves are in close contact with the atmosphere, many air pollutants, such as O3 and NOx, affect the metabolic function of the leaves and interfere with net carbo...

The <i>Biofuels and the Environment: The First Triennial Report to Congress (External Review Draft)</i> (EPA/600/R-10/183A) report, prepared by the National Center for Environmental Assessment (NCEA) within EPA’s Office of Research and Development, is the first report published ...

This report updates the findings of the first Report to Congress, published in 2011, with respect to environmental and resource conservation impacts, which together are intended to address the Section 204 statutory impacts since the passage of the EISA. This report reflects the c...

EPA announced the release of the final report,<i>Biofuels and the Environment: First Triennial Report to Congress</i> (EPA/600/R-10/183F), prepared by the National Center for Environmental Assessment (NCEA) within EPA’s Office of Research and Development, as the first EPA report ...

The Watershed Management Optimization Support Tool (WMOST) was developed by the United States Environmental Protection Agency (US EPA) to facilitate integrated water resources management. The new Benefits Module for WMOST enables stakeholders to calculate the value of additional ...

This report describes the state of the science with respect to total Nr deposition budgets in the United States and the research needed to improve these budgets from both a measurement and modeling perspective. The document is intended to serve as a roadmap for research activiti...

Active soil-gas sampling has been used as a reconnaissance method in support of soil and groundwater sampling of volatile and biodegradable organic compounds for over 30 years. More recently, soil gas sampling has been used directly to evaluate risk posed by vapor migration from ...

Cost effective and reliable techniques are needed for the characterization of contaminated fractured rock aquifers. Two important characteristics of contaminant transport are groundwater velocity (or flux) and contaminant mass flux. Conventional methods for characterization in ...

Near-coastal (0-200 depth) ecosystems and species are under threat from increasing temperatures, ocean acidification, and sea level rise. However, species vary in their vulnerability to specific climatic changes and climate impacts will vary geographically. For management to resp...

The Groundwater Technical Support Center (GWTSC) is part of the Groundwater, Watershed, and Ecosystem Restoration Division (GWERD), which is based in the Robert S. Kerr Environmental Research Center in Ada, Oklahoma. The GWERD is a research division of EPA&rsquo;s National Risk M...

The World Meteorological Organization’s (WMO) Global Atmosphere Watch (GAW) Programme coordinates high-quality observations of atmospheric composition from global to local scales with the aim to drive high-quality and high-impact science while co-producing a new generation of pro...

Swiss needle cast (SNC) is an endemic disease of Douglas-fir caused by Phaeocryptopus gaeumannii. The fungus infects newly emerged needles between May and August. As the fungus develops, its fruiting bodies (pseudothecia) block the stomata and inhibit gas exchange, reducing the p...

EPA announced the availability of the draft report, <em>Updates to the Demographic and Spatial Allocation Models to Produce Integrated Climate and Land Use Scenarios (ICLUS)</em> for a 30-day public comment period. The ICLUS version 2 (v2) modeling tool furthered land change mod...

EPA's announced the availability of the final report, <em>Updates to the Demographic and Spatial Allocation Models to Produce Integrated Climate and Land Use Scenarios (ICLUS)</em> (Version 2). This update furthered land change modeling by providing nationwide housing developmen...

COFFEE will evaluate the environmental impacts of implementing various COF practices by using the amount of total ecosystem C (TEC) sequestered in forests as the integrative response metric. These evaluations will be done for current-climate and future-climate scenarios and will...

The Ground Water Technical Support Center (GWTSC) is part of the Ground Water and Ecosystems Restoration Division (GWERD), which is based in the Robert S. Kerr Environmental Research Center in Ada, Oklahoma. The GWERD is a research division of U.S. EPA's National Risk Management...

The Ground Water Technical Support Center (GWTSC) is part of the Ground Water and Ecosystems Restoration Division (GWERD), which is based in the Robert S. Kerr Environmental Research Center in Ada, Oklahoma. The GWERD is a research division of U.S. EPA's National Risk Management...

Abstract: Nonpoint source pollution is an ongoing challenge for environmental agencies who seek to protect waters of the U.S. Urban stream and waterfront redevelopment projects present opportunities to achieve integrated environmental, economic, and social benefits in urban water...

ABSTRACTUser&rsquo;s Guide &amp; Metadata to Coastal Biodiversity Risk Analysis Tool (CBRAT): Framework for the Systemization of Life History and Biogeographic Information(EPA/601/B-15/001, 2015, 123 pages)Henry Lee II, U.S. EPA, Western Ecology DivisionKatharine Marko, U.S. EPA,...

Within this set of reports and papers, the authors developed an optimization framework to examine how incorporating selected co-benefits (carbon sequestration, recreation/hunting, air quality) of nutrient reductions alters their optimal distribution in the watershed. They used th...

An integrated high resolution mathematical modeling framework is being developed that will link hydrodynamic, atmospheric, and water quality models for the northern Gulf of Mexico. This Research and Quality Assurance Project Plan primarily focuses on the deterministic Gulf of Me...

Ecosystem goods and services are those ecological structures and functions that humans can directly relate to their state of well-being. Ecosystem goods and services include, but are not limited to, a sufficient fresh water supply, fertile lands to produce agricultural products, ...