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Mercury and Copper Levels in Leach Creek (Pierce County) During 2009-2010

Publication number Date Published
11-03-014May 2011
VIEW NOW: Mercury and Copper Levels in Leach Creek (Pierce County) During 2009-2010 (Number of pages: 37) (Publication Size: 1MB)

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Author(s) Friese, M. and A. Johnson
Description The Department of Ecology detected several instances of elevated mercury concentrations at the mouth of Leach Creek in Tacoma during water quality monitoring in 2007-08.

During 2009-10, Ecology conducted a follow-up study to better characterize mercury levels in the creek and assess specific reaches as sources. Copper concentrations were also analyzed.

Water quality violations were detected for mercury and copper in Leach Creek. Sources appear to lie towards the upstream end of Leach Creek.

It is recommended that Leach Creek be placed in Category 5 (303(d) list) of the state Water Quality Assessment as being water quality limited for mercury and copper.
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Keywords WRIA 12, creek, 303(d), water, water quality, mercury, copper
WATERSHED Water Resource Inventory Area 12 Chambers-Clover
DATA Environmental Information Management (EIM) #AJOH0060


Quality Assurance Project Plan: Leach Creek (Pierce County) Mercury and Copper Monitoring.