The Naugatuck River is the west boundary of Harwinton CT and of the Region 10 (Lewis Mills HS) school system. It is free flowing in this part of the river, with little development along its banks. Water quality is affected by upstream use of the river in Torrington, including Torrington's Treatment plant, which happens to be in Harwinton. However, as the lower photo of boards, a discarded oven and other trash shows, cleanup of the banks is needed.