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| Title | Surface Water Monitoring Program for Pesticides in Salmonid-Bearing Streams, 2003-2005: A Cooperative Study by the Washington State Departments of Ecology and Agriculture | |||
| Month-Year Published | October 2006 | |||
| Online Availability |
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| Short Description |
This report presents results from a three-year study intended to characterize pesticide concentrations in salmon-bearing surface waters. Thornton Creek in the Cedar-Sammamish watershed was chosen for an urban evaluation. Marion Drain, Spring Creek, and Sulphur Creek Wasteway in the Lower Yakima watershed represented agricultural drainages. Fifty-one pesticides were detected. Ten of these -- 4,4-DDE, 4,4-DDT, azinphos methyl, carbaryl, chlorpyrifos, diazinon, disulfoton, endosulfan sulfate, malathion, and oxyfluorfen -- were above assessment criteria. Ninety-six percent of detections were below criteria. Restriction of chlorpyrifos and diazinon in Thornton Creek resulted in reduced detection frequency and magnitude. Chlorpyrifos, malathion, and azinphos methyl were detected in all three agricultural drainages. (Also see abstract below) | |||
| Publication Number | 06-03-036 | |||
| Author(s) | Burke, C., P. Anderson, D. Dugger, and J. Cowles | |||
| Print Availability | ||||
| Number of pages | 58 + app (114 total) | |||
| Keywords | agriculture, creek, Endangered Species Act, monitoring, pesticide, quality, salmon, standards, stream, surface water, toxic, trend, urban, waste, water quality standards | |||
| Subject Waterbodies |
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| Related Publications | Title | Relationship | ||
| Quality Assurance Project Plan: Washington State Surface Water Monitoring Program for Pesticides in Salmonid Habitat for Two Index Watersheds | similar topic | |||
| Addendum to Quality Assurance Project Plan for Surface Water Monitoring Program for Pesticides in Salmonid-Bearing Streams: Addition of Skagit-Samish Watersheds, and Extension of Program through June 2009. | supporting publication | |||
| Surface Water Monitoring Program for Pesticides in Salmonid-Bearing Streams, April to December, 2003: A Cooperative Study Conducted by the Washington State Departments of Ecology and Agriculture | part of a series | |||
| Surface Water Monitoring Program for Pesticides in Salmonid-Bearing Streams, April through October, 2004: A Cooperative Study by the Washington State Departments of Ecology and Agriculture | part of a series | |||
| Results from Monitoring Endosulfan and Dieldrin in Wide Hollow Creek, Yakima River Drainage, 2005-06 | similar topic | |||
| Surface Water Monitoring Program for Pesticides in Salmonid-Bearing Streams, 2006 Monitoring Data Summary | similar topic | |||
| Quality Assurance Project Plan: Marion Drain Intensive Surface Water Sampling for Pesticides In Salmonid-Bearing Streams | similar topic | |||
| Surface Water Monitoring Program for Pesticides in Salmonid-Bearing Streams, 2007 Data Summary | part of a series | |||
| POSTER: Pesticides in Salmonid-bearing Streams in an Urban and Agricultural Watershed of the Salish Basin | supporting publication | |||
| Quality Assurance Project Plan: Skagit-Samish Watershed Intensive Surface Water Sampling for Pesticides in Salmonid-Bearing Streams | similar topic | |||
| Abstract | Long Description |
The Washington State Department of Agriculture and the Washington State Department of Ecology conducted a multi-year monitoring study to characterize pesticide concentrations in selected salmonid-bearing streams during the typical pesticide-use season. The first three years of the study, 2003-2005, are reported. Pesticide concentrations were measured in an urban drainage represented by Thornton Creek in the Cedar-Sammamish watershed, and in agricultural drainages represented by Marion Drain, Sulphur Creek Wasteway, and Spring Creek in the Lower Yakima watershed. Temporal trends and potential impacts to aquatic species are investigated through comparison to (1) EPA registration toxicological criteria for fish, aquatic invertebrates, and plants, (2) Washington State Water Quality Standards, and (3) EPA National Recommended Water Quality Criteria. A total of 51 pesticides and degradate compounds were detected in the urban and agricultural drainages. Ten of these -- 4,4-DDE, 4,4-DDT, azinphos methyl, carbaryl, chlorpyrifos, diazinon, disulfoton, endosulfan sulfate, malathion, and oxyfluorfen -- were above assessment criteria. Ninety-six percent of detections were below criteria. Urban uses were restricted for chlorpyrifos in 2000, and were cancelled for diazinon in 2004. The phase out of these chemicals has resulted in reduced detection frequency and magnitude in Thornton Creek. Chlorpyrifos, malathion, and azinphos methyl were detected in all three agricultural drainages. Chlorpyrifos residues were detected in the spring in all agricultural drainages and in the fall in Marion Drain. Azinphos methyl and malathion detections occur when summer maximum temperatures may restrict Mid-Columbia summer steelhead (Endangered Species Act-listed) occupation of monitored stream reaches. If summer steelhead are present, elevated water temperatures may make the steelhead more susceptible to pesticide toxicity. Link to EIM data for User Study ID CBUR0001 |
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This page last updated August 14, 2009
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