Where are PCBs Found?
Potential sources of PCBs in the Spokane River Watershed
PCBs are not manufactured in Spokane. There are many sources of PCBs to wastewater treatment plants and stormwater systems. These include human waste, industrial processes, consumer products, clothing dyes, inks in recycled newsprint, motor oil and more. Wastewater treatment plants are effective in removing significant amounts PCBs from water but are unable to get down to the low levels of the water quality standards. (See Why are PCBs Harmful?) While work is underway to reduce PCBs in contaminated soils, from stormwater systems, and in waste treatment plants, there are still unknown sources that need to be identified and addressed. Once sources are more clearly understood, identification of the best way to reduce the sources of PCB to the river can begin.
In 2016, a study of PCBs in consumer products was completed by the WA State Department of Ecology. The study found that PCBs are widespread and found in consumer products. It also documents the need for an alternatives assessment to help identify safer alternatives to pigments and dyes contaminated with PCBs.
Report: PCBs in Consumer Products (PDF) – This is the full report which includes the PCB levels in common, household items.
Summary of PCBs in Products Report (PDF) – This is a very condensed overview of the report but does not have individual test results for specific items.
You may also visit the Department of Ecology’s PCB web page.
In 2015, a study of PCBs in municipal products was completed by the City of Spokane. Items tested included deicer, antifreeze, pesticides, asphalt related products, and cleaners/degreasers.