Toxics Studies

Ecology's Environmental Assessment Program Toxics Studies Unit monitors toxic chemicals in Washington's environment. These scientific studies provide the foundation for decisions made by governing agencies to reduce the risk from these toxic chemicals of concern.

Short-Term Projects

Targeted Toxics Studies are short-term focused studies including Total Maximum Daily Load (TMDL) assessments, water cleanup plans, stormwater studies, emerging contaminants, and other specific toxics projects in support of agency-wide initiatives.

Long-Term Projects

Freshwater Fish Contaminant Monitoring Program samples fish and water across Washington to characterize levels of toxic contaminants and determine changes in levels over time. This project supports a range of agency activities, such as water-cleanup plans, by monitoring a broad range of toxic substances.

Persistent Bioaccumulative Toxics (PBT) Monitoring program conducts long-term studies to evaluate trends of environmental PBT levels over time. Ecology scientists analyze fish tissue, sediment cores, and suspended particulate matter for PBTs such as mercury, lead, and PAHs. This work supports agency Chemical Action Plans.

All data for these projects are available through the Environmental Information Management (EIM) database.

Toxic Chemicals in Roof Runoff study

new PBT Trend Monitoring reports:
Measuring Mercury Trends in Freshwater Fish, 2012 Sampling Results

PBT Chemical Trends in Washington State Determined from Age-Dated Lake Sediment Cores, 2012 Sampling Results

Measuring Lead in Suspended Particulate Matter from WA State Rivers and Lakes, 2012 Results