Taxpayer-funded researchers say the 10 West Virginia homes they tested each contained traces of a chemical that spilled into their water supply in January.
In samples taken Feb. 11-18, chemical remnants were generally about 675 times less concentrated than the federal safe drinking level for the chemical in water. The independent WV TAP group discussed results Friday at West Virginia State University.
The Jan. 9 spill contaminated 300,000 people's water for days.
Based on WV TAP's suggestion, West Virginia American Water conducted tests last week that found the spilled chemical was still coming out of its plant in treated water. Concentrations were about 2,000 times lower than the safe drinking level.
Researchers also plan to expand the in-home testing to 20-30 homes in each of 21 pressure zones affected by the initial do not use ban.
The group has also finished an odor study and literature review. The total project cost $762,000 from the state.