California Department of Public Health logo: three likenesses of people colored blue, green, and orange  
Last Edited: 2/24/2005

Backyard Chicken Eggs

Backyard chickens can become exposed to toxic chemicals, like dioxins and DDT, if they are allowed to feed or forage on the ground. Because dioxins can travel for long distances in the air, they are almost everywhere in the environment. When chickens forage on a soil, they may consume toxic chemicals that can build up in their bodies and in the eggs they produce. Grocery store eggs, however, are generally from chickens kept in cages above the ground, and do not forage on soil. Because grocery store chickens are raised differently, their eggs have lower levels of chemcials than eggs from backyard chickens.



Fact Sheets




Related Projects

  • Dioxins in California  -- Since 1987, the California Department of Health Services has been investigating dioxin contamination in California....