Public health concern about polychlorinated biphenyls (PCBs) had, we believed, been laid to rest in 1979 when 1976’s Toxic Substance Control Act (TSCA) was used to ban commercial use in manufacturing. Since PCBs do not occur naturally, and remain in the environment for many years, most environmentally detectable sources of PCB have been attributed to “legacy” sources. However, an Environmental Health Perspectives review that brings to light sources of PCBs in the environment claims PCB-11, used in yellow dye, is a new a source of contamination in our environment. Read more.
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