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Inputs of the Dormant-Spray Pesticide, Diazinon, to the San Joaquin River, California, February 1993

Fact Sheet 133-95

By:
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Abstract

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.

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Additional Publication Details

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
Edition:
-
Year Published:
1995
Language:
ENGLISH
Publisher:
Geological Survey (U.S.)
Contributing office(s):
National Water Quality Assessment Program, California Water Science Center
Description:
2 p.