Dissolved Pesticides in Weekly Water Samples from the NAWQA California Stream Quality Assessment (2017)

Publication Date

2021-06-22

Time Period

2017-03-13

Time Period

2017-05-11

Morace, J.L., Sandstrom, M.W., Nowell, L.H., Mahler, B.J., Button, D.T., and VanMetre, P.C., 2021, Dissolved Pesticides in Weekly Water Samples from the NAWQA California Stream Quality Assessment (2017): U.S. Geological Survey data release, https://doi.org/10.5066/P9ADZYQE.

This Data Release contains pesticide concentrations in weekly water samples from the California Stream-Quality Assessment (CSQA) conducted by the Regional Stream-Quality Assessment (RSQA) Project. The pesticide data in this Data Release represent one component of the RSQA studies, which are multistressor studies conducted by the USGS National Water Quality Assessment Project, National Water Quality Program. The objectives of the data collection were to characterize mixtures of currently used pesticides and their degradates in streams; to screen these mixtures for potential aquatic toxicity by using a combination of aquatic-life benchmark comparisons and the Pesticide Toxicity Index; and to generate pesticide indicators for use as explanatory variables in ecological models. Two pesticide methods were used to analyze for 253 pesticide compounds: LCM60 (223 pesticide compounds analyzed in all RSQA studies) and LCM75 (30 pesticide compounds analyzed by a new method in just the CSQA).

ScienceBase WMS

• National Water-Quality Assessment Project
• USGS Data Release Products