CONTENTS
Abstract
Introduction
Study methods
Pesticides and their
metabolites in community water-supply wells
Comparison with Long Island studies
Benefits of low detection
limits
What are metabolites?
Effects of land use on
pesticide concentrations
Effects of induced
infiltration on pesticide concentrations
Federal and New York State water-quality standards used in this study
Summary
Acknowledgment
References cited
FIGURES
1. Land use and location
of sites sampled in western and central New York.
2. Concentration of
pesticides detected in samples collected from 32 community water-supply wells
in August 1999, and percentage of samples in which each pesticide was
detected.
3. Atrazine
and metolachlor concentrations in samples from
community water-supply wells in New York, 1999, and percentage of
agricultural and urban land within a half-mile radial area around the wells.
A. Agricultural land. B. Urban land.
4. Concentration of atrazine, metolachlor, and
their metabolites in water samples from community water-supply wells in New York State, 1999. A. Wells with water that is potentially affected by induced
infiltration of surface water. B. Wells with water derived mainly through direct
infiltration of precipitation through land surface.
TABLES
1. Land use and
infiltration of surface water at 32 community water-supply wells in central
and western New york, August 1999.
2. Detection limits for
the 60 pesticide and pesticide metabolites for which
samples were analyzed, August 1999. A. Gas chromatography/Mass spectrometry
(GCMS) - US Geological Survey National Water Quality Laboratory, Denver, Colorado. B. High performance liquid chromatography (HPLC)
- US Geological Survey Organic Research Laboratory, Lawrence, Kansas. C. Gas chromatography/Mass spectrometry (GCMS) -
US Geological Survey Organic Research Laboratory, Lawrence, Kansas.
Citation: Eckhardt, D.A.V., Hetcher,
K.K., Phillips, P.J., and Miller, T.S., 2001, Pesticides and Their
Metabolites in Community Water-Supply Wells of Central and Western
New York, August 1999: U.S.
Geological Survey Water-Resources Investigations Report 00-4128, 12 p.
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