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New testing shows low levels of a banned toxic chemical are still showing up in a variety of everyday products including paints, newspapers, magazines and cardboard food packaging.

The Washington Department of Ecology tested 68 different products for the chemical polychlorinated biphenyls, or PCBs, which likely cause cancer and were banned in 1979. The tests found the compound at low levels in 49 different products, according to a report released Thursday. The chemical is apparently an inadvertent byproduct of manufacturing many dyes and pigments.

The highest PCB levels were found in packaging of Ritz cheese and cracker snack packaging, paint color and yellow spray paint, but the study didn’t assess health risks, according to Ecology spokeswoman Erika Holmes. The compound was detected in packaging of numerous food items including lime Jello, macaroni and cheese, Fruit by the Foot and taco shells.   


The report concludes that consumer products are “a continuing new source of PCB contamination” and that one source of that contamination, PCB-11, is mostly unregulated.

PCBs were widely used in electrical transformers and lubricants until they were banned in 1979. They are known to harm immune, reproductive, nervous and hormone-regulation systems in humans and other living things. They continue to be detected in waterways across the Northwest.

The Toxic Substances Control Act that banned PCBs didn’t outlaw manufacturing them at low levels, according to Alex Stone, lead chemist on the Ecology project.