Willamette Mercury Phase I Study 2002 - 2003

Quality Assurance Project Plan - Willamette Basin Mercury Monitoring Project - August 2002 PDF

Select from the following categories to access data results.

Site Table PDF
Site Map
Sediment Data PDF
Water Data - October 2002PDF
Water Data - December 2002 PDF
Water Data - March 2003 PDF
Water Data - June 2003 PDF
Fish Data PDF
 

Willamette Mercury Phase II Study 2007 - 2008

In this study, water samples will be collected from sites throughout the basin to better understand the spatial and temporal correlation between mercury and methyl mercury in the water column, and the point source load contribution. A final objective of this study is to further identify and characterize potential sources of mercury in the Willamette River Basin and to assign load and waste load allocations, if necessary. Samples will be collected from distinct locations along the mainstem Willamette, the mouths of major tributaries, near point sources and areas of known sources of mercury and methyl mercury. A reference site on the Middle Fork Willamette River above the Hills Creek Reservoir was selected as a background site for the basin. Temperature, pH, redox, dissolved oxygen, alkalinity and conductivity will be measured in the field by DEQ staff. In addition, water samples will be analyzed at a contract lab for total methyl mercury, dissolved methyl mercury, total suspended solids, hardness, total organic carbon, dissolved organic carbon and sulfate. Monitoring in the Willamette Basin will start in March 2007 and terminate in March 2008, for a total of five quarters.

• Phase II Site Map

• Phase II Site Table and Parameters Collected