The state Health Department issued a study showing elevated rates of kidney cancer among woman and non-Hodgkin's lymphoma in men in the neighborhood above the groundwater plume.
The report could not conclusively link the cancers to the solvents that are contaminating the groundwater.
The solvents had been used at the factory in the northern end of the Passaic County town, which operated from the late 1800s until it was closed in 1994.
DuPont spokesman Robert Nelson says the company is working with experts to study groundwater cleanup methods.
