The Burlington Public Works department says the Vermont city’s sewage treatment plant is operating normally again after about 250,000 gallons of raw sewage was inadvertently released into Lake Champlain.
The department’s Laurie Adams says a valve on a chlorination pump had mistakenly been left in the "off" position Wednesday causing the sewage and about 2.25 million gallons of storm water to be discharged into the lake over about 90 minutes.
She says the sewage discharged into the lake had undergone partial treatment that separated out the solids.
Adams says tests Thursday found no evidence of contamination.
Adams says the release did not threaten the safety of the city’s drinking water.