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Water- and Air-Quality Monitoring of the Sweetwater Reservoir Watershed, San Diego County, California-Phase One Results, Continued, 1999-2001

Data Series 233

In cooperation with the Sweetwater Authority
By:
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Abstract

In 1998, the U.S. Geological Survey, in cooperation with the Sweetwater Authority, began a study to assess the overall health of the Sweetwater watershed with respect to chemical contamination. The study included regular sampling of air and water at Sweetwater Reservoir for chemical contaminants, including volatile organic compounds, polycyclic aromatic hydrocarbons, pesticides, and major and trace elements. Background water samples were collected at Loveland Reservoir for volatile organic compounds and pesticides. The purpose of this study was to monitor changes in contaminant composition and concentration in the air and water resulting from the construction and operation of State Route 125 near Sweetwater Reservoir. To accomplish this, the study was divided into two phases. Phase One sampling was designed to establish baseline conditions for target compounds in terms of detection frequency and concentration in air and water. Phase Two sampling is planned to continue at the established monitoring sites during and after construction of State Route 125 to assess the chemical impact this roadway alignment project may have on the water quality in the reservoir. In addition to the ongoing data collection, several special studies were initiated to assess the occurrence of specific chemicals of concern, such as low-use pesticides, trace metals, and wastewater compounds. This report describes the study design, and the sampling and analytical methods, and presents the results for the second and third years of the study (October 1999 to September 2001). Data collected during the first year of sampling (October 1998 to September 1999) were published in 2002.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Water- and Air-Quality Monitoring of the Sweetwater Reservoir Watershed, San Diego County, California-Phase One Results, Continued, 1999-2001
Series title:
Data Series
Series number:
233
Edition:
-
Year Published:
2007
Language:
ENGLISH
Contributing office(s):
California Water Science Center
Description:
x, 270 p.
Time Range Start:
1999-10-01
Time Range End:
2001-09-30
Additional Online Files(Y/N):
Y