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An Assessment of the PCB and Dioxin Background in Washington Freshwater Fish, with Recommendations for Prioritizing 303(d) Listings

Publication number Date Published
10-03-007January 2010
VIEW NOW: Acrobat PDF format (Number of pages: 80) (Publication Size: 1421KB)

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Author(s) Johnson, A., K. Seiders, and D. Norton
Description Section 303(d) of the Clean Water Act requires states to prepare a list of waterbodies that do not meet water quality standards. A Total Maximum Daily Load (TMDL) must be developed for each waterbody to determine the amount of a pollutant that can be discharged to it.

Washington has a number of 303(d) listings for PCBs and dioxins not meeting human health criteria in fish from rivers, lakes, and streams. Many of these waterbodies have no obvious local sources of these chemicals.

In order to prioritize the state’s TMDL resources, a study was conducted to measure PCB and dioxin levels in fish from freshwater background areas. The results are used to recommend approaches for prioritizing 303(d) listings for these compounds.
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Keywords background, WRIA 62, WRIA 60, WRIA 46, WRIA 30, WRIA 27, WRIA 20, lakes, fish, river, water, Total Maximum Daily Load, section 303(d), dioxin, freshwater, clean water act
WATERSHED Water Resource Inventory Areas
(WRIA 02,WRIA 04,WRIA 07,WRIA 08,WRIA 13,WRIA 16,WRIA 20,WRIA 21,WRIA 24,WRIA 27,WRIA 30,WRIA 34,WRIA 35,WRIA 38,WRIA 39,WRIA 46,WRIA 49,WRIA 56,WRIA 58,WRIA 60,WRIA 62)
DATA Environmental Information Management (EIM) #WSTMP07

Environmental Information Management (EIM) #WSTMP08


Quality Assurance Project Plan: PCB and Dioxin Levels in Resident Fish from Washington Background Lakes and Rivers