Dichlorophenols are chemical compounds commonly found in pesticides and used for tap water chlorination. A recent study of 10,438 Americans showed 24.4% had dichlorophenols in their urine. Researchers found those with dichlorophenols in their urine were more likely to suffer from food allergies. Further research is needed to determine whether or not dichlorophenol exposure is a cause of food allergies.
Annals of Allergy, Asthma and Immunology, December 2012