What Are Dioxins and Pcbs?

Dioxins and polychlorinated biphenyls (PCBs) are toxic chemicals that persist in the environment and accumulate in the food chain. ... Dioxins have no technological or other use, but are generated in a number of thermal and industrial processes as unwanted and often unavoidable by-products.

How are dioxins and PCBs produced?

Dioxins and furans are released into the air from combustion processes. The wide use of PCBs as dielectric and coolant fluids in the past has resulted in their presence in the environment. FDA has been monitoring specific foods with the goal of identifying ways to reduce dietary exposure to dioxin.

What are dioxins found in?

Dioxins are found throughout the world in the environment. The highest levels of these compounds are found in some soils, sediments and food, especially dairy products, meat, fish and shellfish. Very low levels are found in plants, water and air.