The county seat of Suffolk County, NY lies at the mouth of a river that flows into which body of water?
Peconic River The Peconic River is a river within Suffolk County on Long Island, New York in the United States. The river is located in the eastern end of Long Island. The Peconic River drains an area between the Harbor Hill and Ronkonkoma terminal moraines, and flows into Flanders Bay which in turn connects to Peconic Bay east of Riverhead.
Bog Brook Reservoir The Bog Brook Reservoir is a 379 acre reservoir in the Croton Watershed in southern New York State. It is located in the town of Southeast in Putnam County, and is approximately 38 mi north of New York City, to which it supplies water. It was formed by the damming of Bog Brook, a small tributary of the East Branch of the Croton River, which is in turn a tributary of the Croton River. This reservoir was put into service in 1892, making it one of the older reservoirs in New York City's water supply system.