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UncertaintyWhat are the main factors controlling mercury methylation in the region? How is mercury cycling influenced by lake stratification, dissolved oxygen, primary production, seasonal drawdown, flood-up patterns and bioaccumulation in Columbia River Basin reservoirs?
ThemeContaminants
SubthemeAssessment (distribution and concentration)
Sources Recommendations for the 2014 Program Amendment from Cowlitz I.T., USRTF, NOAA-F
US EPA Toxics Action Plan 2010
Criticality Level Medium

last updated: Nov 09, 2015