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Review of Sediment Quality Data for the Similkameen River

Publication number Date Published
00-03-027July 2000
VIEW NOW Review of Sediment Quality Data for the Similkameen River (Number of pages: 42) (Publication Size: 597KB)

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Author(s) Johnson, A., and R. Plotnikoff
Description Chemical and biological data were reviewed from sediment samples collected at nine sites in the Similkameen River during 1995 - 1999. Except for arsenic, the level of chemical contamination is low. Arsenic concentrations have exceeded sediment quality guidelines in the Palmer Lake/Nighthawk area. Bioassays with Hyalella azteca and Microtox, however, have given inconsistent indications of toxicity. Limited benthic macroinvertebrate sampling also points to the slow-moving reach near Palmer Lake/ Nighthawk as potentially having a low-level metals contamination problem. This would be the area to focus on, if further sediment sampling were conducted.
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Keywords bioassay, river, chemical, sediment, toxic, quality, lake, arsenic
WATERSHED Water Resource Inventory Area 49 Okanogan
DATA Environmental Information Management (EIM) #AJOH0018