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• W1594182014 abstract "Volatile organic compounds (VOCs) are being measured in stream samples as part of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program. Published freshwater aquatic toxicity information and waterquality criteria for VOCs were compiled to compare with the measured concentrations. Aquatic toxicity information for VOCs was retrieved from the U.S. Environmental Protection Agency's (USEPA's) toxicity data base, AQUatic toxicity Information REtrieval (AQUIRE). Toxicity information that had complete or moderately complete documentation was available for 60 of the 87 VOCs that are being measured in water samples. Most toxicity information was from studies of 96 hours or less, and species mortality was typically the endpoint of the toxicity test. A number of published studies using the same species, duration, and endpoint were available for some VOCs. In these instances, only the two studies that reported the lowest concentrations that had an effect were included in the summary. VOCs that had the lowest concentrations that affected a species ranged between 6.5 |*ig/L (micrograms per liter) for 1,1,2,3,4,4-hexachloro-1,3-butadiene and 5,091,000 |^g/L for 2-butanone. The USEPA and Canadian Council of Resource and Environment Ministers have established water-quality criteria and guidelines for 39 of the 87 VOCs measured in water samples by the NAWQA Program. Criteria and guidelines range from 0.1 |^g/Lfor l,l,2,3,4,4-hexachloro-l,3butadiene to 860,000 |J,g/L for 3-chloro-l-propene and chloroethane. These water-quality criteria, guidelines, and toxicity information will be used by NAWQA to assess the status of the Nation's water quality and are available for use by individuals, agencies, and organizations to evaluate the potential effect of VOCs on aquatic life in streams and rivers. INTRODUCTION The National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) is a systematic assessment of the quality of the Nation's water resources. The primary goals of NAWQA are to describe the status and trends in the quality of a large, representative part of the Nation's surface-water and ground-water resources and to identify the primary natural and human factors affecting the quality of these resources. The design of NAWQA, discussed in detail by Gilliom and others (1995), is organized around 59 Study Units (fig. 1) that include sections of most of the Nation's major river basins and aquifers. The starting dates of Study-Unit Investigations are staggered between fiscal years 1991 and 1997, and at any time water-quality data are being collected in about 16 to 20 Study Units. Another component of the NAWQA Program is National Synthesis Investigations (NSIs), which are focused on specific groups of contaminants. In part, these investigations compile, analyze, and report water-quality data (collected by Study Units) on a Introduction 1 ro (D a > .a D) =r . o o X Lo ng Is lan d a nd Ne w Je rs ey Co as ta l D ra ina ge s De law ar e Ri ve r B as in * ^^ ^ 7i / ^D el m ar va P en ins ula _ u '^ ' Po to m ac R ive r B as in K an aw ha -N ew Ri ve rB as in E X P L A N A T IO N" @default.
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• W1594182014 date "1997-01-01" @default.
• W1594182014 modified "2023-09-27" @default.
• W1594182014 title "Summary of published aquatic toxicity information and water-quality criteria for selected volatile organic compounds" @default.
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• W1594182014 doi "https://doi.org/10.3133/ofr97563" @default.
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