Someone spilled latex paint in a canal that leads into the Naugatuck River in Ansonia and crews from the state Department of Energy and Environmental Protection have responded to contain the spill.
DEEP said they put absorbent boom on part of the canal, but much of the paint has spilled or will spill into the river.
The boom will remain in place until Monday.
The 40-mile long river runs from Torrington and through 11 towns in New Haven and Litchfield counties and is the largest river within the state’s boundary lines, according to the Naugatuck River Watershed Association.