Drinking Water
Drinking Water
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Selected Pharmaceuticals Not Likely to Persist in Wild Fish: Results of Uptake and Elimination Testing
Laboratory study shows that both uptake and elimination of selected pharmaceuticals within bluegill tissues is rapid indicating that persistence in bluegills in the environment is likely to be low except in those fish that reside downstream from a consistent, substantial, contaminant source.
Enhancement of Trichloroethene (TCE) Biodegradation in a Simulated Groundwater System
This laboratory-based study provides information for understanding enhancement of trichloroethene (TCE) biodegradation in a simulated groundwater system.
Trace Levels of Organic Chemicals Limited to Local Reaches of a Stream near an Oil and Gas Wastewater Disposal Facility
Organic contaminants that were present in Wolf Creek near a wastewater disposal facility were not evident farther downstream where Wolf Creek enters the New River. Wolf Creek and the New River are used for drinking water and recreational purposes.
Understanding Chemical and Microbial Contaminants in Public Drinking Water
Collaborative joint agency study provides nationally consistent and rigorously quality-assured datasets on a wide range of chemical and microbial contaminants present in source and treated public drinking water supplies. Tap water was not analyzed in this study.
Nitrate Addition Enhances Arsenic Immobilization in Groundwater
The addition of nitrate in a low oxygen groundwater resulted in the immobilization of naturally occurring dissolved arsenic and the conversion of nitrate to innocuous nitrogen gas.
Contaminant Transport Models Aid in Understanding Trends of Chlorinated Ethenes in Public Supply Wells
U.S. Geological Survey (USGS) scientists used a mass–balance solute–transport model to enhance an understanding of factors affecting chlorinated ethene (CE) concentrations in a public supply well. They found that long–term simulated and measured CEconcentrations were affected by dense nonaqueous phase liquid (DNAPL) volume, composition, and by the bioavailability of organic carbon that drives...
Measuring Antidepressants, Fungicides, and Insecticides in the Environment
U.S. Geological Survey (USGS) scientists are developing new laboratory analytical methods to measure contaminants in samples of environmental water, sediment, and soil. The work is part of a continuing effort to provide information on new and understudied contaminants to water-resource managers, environmental regulators, and the public. The new methods are used by USGS scientists and others to...
Emerging Contaminants Targeted in a Reconnaissance of Ground Water and Untreated Drinking-Water Sources
Two national-scale reconnaissance studies recently conducted by the U.S. Geological Survey (USGS) were the first to collect baseline information on the environmental occurrence of pharmaceuticals, personal-care products, detergents, flame retardants, naturally occurring sterols, and other organic contaminants in ground water and untreated sources of drinking water in the United States. These...
Glyphosate Found in Wastewater Discharged to Streams
Glyphosate is the most widely used herbicide in the world, and is widely used to control weeds in both agricultural fields and in urban and suburban settings. In 2002, USGS scientists sampled the wastewater discharged into streams from 10 wastewater treatment plants. Although the observed concentrations were small, these results are the first to demonstrate that the discharge from wastewater...
A Decade of Research on the Occurrence of Triazine Herbicides in the Environment Leads to a Unique Summary
U.S. Geological Survey (USGS) scientists completed a variety of groundbreaking studies on the occurrence, fate, and transport of triazine herbicides and their degradates throughout the 1990s. The results of these studies have been summarized and condensed into a USGS report and a book chapter providing, for the first time, a comprehensive snapshot of a decade of this research.