This report summarizes the current state of knowledge on the persistence of chemical contamination on drinking
water infrastructure (such as pipes) along with information on decontamination should persistence occur.
Decontamination options for drinkingwater infrastructure have been explored for some chemical contaminants,
but important data gaps remain. In general, data on chemical persistence on drinking water infrastructure is
available for inorganics such as arsenic and mercury, as well as select organics such as petroleum products, pesticides
and rodenticides. Data specific to chemicalwarfare agents and pharmaceuticalswas not found and data on
toxins is scant. Future research suggestions focus on expanding the available chemical persistence data to other
common drinking water infrastructure materials. Decontaminating agents that successfully removed persistent
contamination from one infrastructure material should be used in further studies. Methods for sampling or
extracting chemical agents from water infrastructure surfaces are needed.