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Results and Recommendations from Monitoring Arsenic Levels in 303(d) Listed Rivers in Washington

Publication number Date Published
02-03-045October 2002
VIEW NOW Results and Recommendations from Monitoring Arsenic Levels in 303(d) Listed Rivers in Washington (Number of pages: 29) (Publication Size: 1MB)

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Author(s) Johnson, A. and S. Golding
Description Based on a review of routine monitoring data and other water quality information, it was recommended that the 1998 303(d) listings for arsenic exceeding human health criteria in the Puyallup, Cowlitz, Spokane, and Columbia rivers should be removed, and that a TMDL should be conducted for arsenic in the lower Yakima River. The other 1998 listings for arsenic are for the Stillaguamish and Similkameen rivers, where TMDL evaluations are currently underway. Water quality data considered for future 303(d) arsenic listings should clearly demonstrate that exceedances of standards are due to anthropogenic, rather than natural, sources and should include some measurement of total inorganic arsenic on which the criteria are based.
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Keywords recommendations, toxics, results, rule, Columbia River, 303(d), river, water, water quality, monitoring, toxic, Total Maximum Daily Load, arsenic
WATERSHED Water Resource Inventory Areas
DATA Environmental Information Management (EIM) #AJOH0028

Environmental Information Management (EIM) #AJOH0029


Stillaguamish River Watershed Fecal Coliform, Dissolved Oxygen, pH, Mercury, and Arsenic Total Maximum Daily Load Study

Results of Sampling to Verify 303(d) Metals Listings for Selected Washington State Rivers and Creeks