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Inputs of the Dormant-Spray Pesticide, Diazinon, to the San Joaquin River, California, February 1993
Fact Sheet
133-95
By: Joseph L. Domagalski, Neil M. Dubrovsky, and Charles R. Kratzer
INTRODUCTION
The objective of the National Water Quality Assessment (NAWQA) Program of the U.S. Geological Survey is to describe the status and trends of the Nation's water quality with respect to natural features of the environment and human activities or land-use. Pesticides are a major water-quality issue in the San Joaquin Valley of California (fig. 1), and pesticide residues may be transported to rivers and streams in agricultural runoff following winter storms. Three sites in the western San Joaquin Valley were monitored during and after two February 1993 storms. The storms occurred after extensive spraying of organophosphate insecticides, mostly diazinon, on almond and other stone-fruit orchards.
Suggested Citation
Domagalski, J.L., Dubrovsky, N.M., Kratzer, C.R., 1995, Inputs of the Dormant-Spray Pesticide, Diazinon, to the San Joaquin River, California, February 1993: U.S. Geological Survey Fact Sheet 133-95, 2 p., https://doi.org/10.3133/fs13395.
ISSN: 2327-6932 (online)
Study Area
Publication type
Report
Publication Subtype
USGS Numbered Series
Title
Inputs of the Dormant-Spray Pesticide, Diazinon, to the San Joaquin River, California, February 1993
Series title
Fact Sheet
Series number
133-95
DOI
10.3133/fs13395
Year Published
1995
Language
ENGLISH
Publisher
Geological Survey (U.S.)
Contributing office(s)
California Water Science Center, National Water Quality Assessment Program