Laboratory and Environmental Assessment
Water Quality Monitoring
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Willamette Basin Mercury Study
There are currently ten areas in the Willamette Basin listed for mercury on Oregon's list of impaired waterbodies. The listings extend from the Cottage Grove and Dorena Reservoirs in the Coast Fork Subbasin to the mouth of the Willamette River. DEQ based these mercury listings on health advisories issued by Oregon Health Authority warning against consuming fish in these areas.
DEQ's Willamette Basin Mercury Study addresses the 303(d) listings for mercury in the Willamette Basin and meets the following objectives:
Willamette Basin Mercury Study: Phase I and Phase II
For more information about DEQ's Laboratory and Environmental Assessment Division please email LEAD.