Main Street in Willimantic was closed after police and firefighters responded to reports of a ruptured sewage line on Sunday morning.
The Connecticut Fish and Wildlife division of the Department of Energy and Environmental Protection said DEEP received a call from firefighters about a large ruptured sewer line and a large volume of flow into storm drains and into the Willimantic River.
It is unclear what caused the sewer line to rupture.
There is no word on how much sewage flowed into the storm drains or the river.
