Abstract
ABSTRACTLegacy contaminants, those predating modern environmental statutes, are exemplified by arsenic, lead, chlorinated dioxins, DDT (dichlorodiphenyltrichloroethane), PAHs (polycyclic aromatic hydrocarbons), PCBs (polychlorinated biphenyls), PFCs, and radioactive fallout. Some pose risks recognized for decades. Concern about others is emerging. Until recently, routine monitoring of PFCs was infeasible, and their public health significance in the parts-per-trillion range unrecognized. Properties of emerging contaminants are exemplified by PFOA, PFOS, and other PFCs in the Village of Hoosick Falls, Rensselaer County, New York. Lessons learned should be embodied in laws, regulations, and enforcement to assure that we leave to our descendants a more positive environmental legacy than that left to us.
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