Detections of Eleven Organophosphorus Insecticides and One Herbicide Threatening Pacific Salmonids, Oncorhynchus spp., in California, 1991–2010

  • Emily B. Lisker
  • Michael P. Ensminger
  • Sheryl L. Gill
  • Kean S. Goh
Article

Abstract

California’s surface water monitoring results from 1991 through 2010 were analyzed to determine whether 12 organophosphorus insecticides and herbicides (i.e., azinphos methyl, bensulide, dimethoate, disulfoton, ethoprop, fenamiphos, methamidophos, methidathion, methyl parathion, naled, phorate, and phosmet) and their degradates have been detected above maximum concentration limits (MCLs) in Pacific salmonid habitats. Methidathion, methyl parathion, phorate, phosmet, and the oxygen analogue of naled (DDVP) detections exceeded MCLs. Methyl parathion detections may be accounted for by monthly use trends, while methidathion detections may be explained by yearly use trends. There were inadequate phorate, phosmet, or DDVP data to evaluate for correlations with use.

Keywords

Organophophorus Surface water Salmonids Endangered species 

Notes

Acknowledgments

We would like to thank Nan Singhasemanon for his critical review of this manuscript.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Emily B. Lisker
    • 1
  • Michael P. Ensminger
    • 1
  • Sheryl L. Gill
    • 1
  • Kean S. Goh
    • 1
  1. 1.Environmental Monitoring Branch, Department of Pesticide Regulation, California Environmental Protection AgencySacramentoUSA

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