A stormwater collection trench overflowed Thursday evening at the site of a Charleston company that spilled chemicals into West Virginia's largest water supply.
The spill sent a "small but undetermined" amount of water into the Elk River, according to the state Department of Environmental Protection. West Virginia American Water detected no traces of the chemical that spilled in January in treated and untreated water at its treatment plant Thursday night.
DEP said inspectors discovered the issue at 5 p.m. The department notified the public at 10:25 p.m.
The water treatment plant is 1.6 miles downstream from Freedom Industries. The company's January spill turned water taps off to 300,000 people for days.
Freedom is in the midst of bankruptcy proceedings. The company also is under multiple state and federal investigations.
The water testing was conducted in the Elk River near the treatment plant's intake, as well as elsewhere.