Contaminant Level (MCL)
Hexachlorocyclopentadiene (HEX) is an organic chemical used in the chemical industry to manufacture of other chemicals, including pesticides (heptachlor, chlordane, aldrin, dieldrin, endrin, mirex, pentac, and endosulfan), flame retardants, resins, and dyes.
HEX arrives in drinking water primarily through discharge from chemical factories.
Some people who drink water containing hexachlorocyclopentadiene well in excess of the maximum contaminant level [0.05 milligrams per Liter] for many years could experience problems with their kidneys or stomach.
The EPA recommends granular activated carbon (GAC) in combination with packed tower aeration (an air stripping method) for the treatment of HEX.
(whole house & well units)