Publications Home || Browse by topic || Browse by program || Ecology website

Publication Summary

Our Ecology website has changed, which can cause broken links.
To report these, please contact us with the publication and broken link.


Freshwater Fish Contaminant Monitoring Program: 2016 Results

Publication number Date Published
19-03-013August 2019
VIEW NOW Freshwater Fish Contaminant Monitoring Program: 2016 Results (Number of pages: 74) (Publication Size: 2834KB)

Trouble viewing? Try these free options.
Author(s) Seiders, K. and P. Sandvik
Description Ecology’s Freshwater Fish Contaminant Monitoring Program collected fish at 11 sites from six areas in the Cowlitz River in 2016. Laboratory analyses were performed on 53 composite samples, which were created using 235 individual fish representing six species.

Goals were to characterize contaminant concentrations in fish. Chemicals frequently detected were mercury, PCBs, PBDEs, DDTs, and dioxins/furans. PCBs were highest in whole largescale sucker (411 ug/kg) and fillets from northern pikeminnow (54 ug/kg). Mercury was highest in fillets from northern pikeminnow (566–1010 ug/kg) and largemouth bass (316–610 ug/kg).

Concentrations of mercury, PCBs, PBDEs, and DDTs in most fillets of cutthroat trout, mountain whitefish, and northern pikeminnow from the Cowlitz River near Vader appear to be lower than those sampled in 1995 and 2005; however, small sample sizes and differences in the sizes and ages of these species across years confounded temporal trend analyses. Concentrations of PCBs in whole largescale suckers appear to be the same for 1995 and 2016.

Spatial trends appeared to be present, with concentrations of DDTs, PCBs, and PBDEs increasing from upstream to downstream sites.

Results support the current 303(d) listings and suggest that additional listings for mercury and PCBs may result from the next Water Quality Assessment.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

ADA Accessibility
The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188.
Visit Ecology’s website for more information.
Contact EAP Publications Coordinator at 360-407-6764 or
Keywords fishing, Cowlitz, PBT, PCB, fish tissue, contaminants, samples, toxics, toxics monitoring, toxic chemicals, sampling, pesticides, pollutant, fish, 303(d), chemical, water quality, monitoring, toxic, TMDL, mercury, PBDE, PBDEs, PBTs, PCBs, pesticide, pollution, dioxin, fish consumption, freshwater, DDE, DDT, program, Mayfield Lake, Riffe Lake, Scanewa Lake, Cowlitz River, monitor
WEB PAGE Freshwater Fish Contaminant Monitoring
WATERSHED Water Resource Inventory Area 26 Cowlitz
DATA Environmental Information Management (EIM) #FFCMP16


Addendum 2 to Quality Assurance Project Plan: Freshwater Fish Contaminant Monitoring Program, 2021: Lake Chelan

Quality Assurance Project Plan Addendum 1: Freshwater Fish Contaminant Monitoring Program, 2019

Quality Assurance Project Plan: Freshwater Fish Contaminant Monitoring Program

Addendum 5 to Quality Assurance Project Plan: Freshwater Fish Contaminant Monitoring Program, 2016

Quality Assurance Project Plan: Assessment of Methods for Sampling Low-Level Toxics in Surface Waters