Tests are available for PCBs in blood, body fat, and breast milk. Blood tests are the best method for detecting recent exposures to large amounts. These tests are not routinely performed at your doctor's office. High levels in your body fluids indicate exposure to high levels of PCBs. These tests can't determine the exact amount or type of PCBs, how long you were exposed, or if you will develop harmful health effects.
Most people have small but measurable amounts of PCBs in their blood, fat, and breast milk.
EPA regulates the transport, storage, or disposal of PCBs. EPA limits the amount of PCBs in publicly owned waste water treatment plants, and requires industry to report release of 1 pound or more. One thousandth of a gram. U.S. Department of Health and Human Services, Public Health Service. U.S. Department of Health and Human Services, Public Health Service.