by U.S. Dept. of the Interior, U.S. Geological Survey in [Reston, Va.? .
Written in English
|Series||USGS Fact sheet -- FS-076-98, Fact sheet (Geological Survey (U.S.)) -- FS-98-076|
|Contributions||Geological Survey (U.S.)|
|The Physical Object|
|Pagination|| p. :|
Glyphosate is frequently applied to corn and soybeans growing areas like these in Iowa. Photo Credit: William A. Battaglin, USGS. Researchers with the U.S. Geological Survey (USGS) recently investigated 51 streams in nine Midwestern States to determine the presence of a wide range of herbicides, their degradation byproducts and antibiotics. Burkart, M.R., and Ragone, S.A., , Planned studies of herbicides in ground and surface water in the Midcontinental United States, in Papers from International Symposium on Integrated Approaches to Water Pollution Problems, Lisbon, Portugal, June , International Water Resources Association, v. 3, p. SU, SA and IMI herbicides will be detected in surface water and ground water in the midwest. 2. The frequency of detections and concentrations of SU, SA, and IMI herbicides will be significantly less than that of other herbicides that are applied in greater total amounts. Herbicides in Ground Water Some background: I will use herbicides and pesticides interchangeably. Herbicides kill plants; pesticides include herbicides (plus chemicals that kill other things, like insects). We sampled for herbicides only. Herbicides, by their nature, are .
A study conducted by the EPA in reached these conclusions about herbicides in drinking water: Drinking water in the Midwest is commonly contaminated with two or more of the above herbicides. 61% of water samples taken in Kansas City contained two or more of these herbicides. Occurrence of selected herbicides and herbicide degradation products in Iowa's Ground Water, Herbicide compounds were prevalent in ground water across Iowa, being detected in 70% of the municipal wells sampled during the summer of Herbicide degradation products were three of the four most frequently detected compounds for this. Most herbicides applied to crops are adsorbed by plants or transformed (degraded) in the soil, but small fractions are lost from fields and either move to streams in overland runoff, near surface flow, or subsurface drains, or they infiltrate slowly to ground water. Herbicide transformation products (TPs) can be more or less mobile and more or less toxic in the environment than their source. Graph showing concentrations of herbicides measured in ground water at individual sites during the NAWQA and MWPS investigations in relation to drinking-water criteria TABLES 1. Factors associated with pesticide detections in ground water and the nature of supporting evidence in the literature 2.
Distribution of Major Herbicides in Ground Water of the United States By Jack E. Barbash, Gail P. Thelin, Dana W. Kolpin, and Robert J. Gilliom Abstract Information on the concentrations and spatial distributions of pesticides and their transformation products, or degradates, in the Cited by: 1. Introduction. Herbicides in surface and ground water are a major concern throughout the USA. Numerous studies have been completed by various government agencies, including the US Geological Survey (USGS), and by chemical manufacturers to document occurrences of herbicides in ground water (Kolpin et al., ), rainfall (Goolsby et al., , Pomes et al., ), and surface Cited by: Pesticides are chemicals designed to kill pests, including insects (insecticides), weeds (herbicides), and fungi (fungicides). The USGS assesses the occurrence and behavior of pesticides in streams, lakes, and groundwater and the potential for pesticides to contaminate . Concentrations of herbicides measured in ground water at individual sites during the NAWQA investigation, in relation to drinkingwater quality criteria (USEPA, ).