The St. Clair River is a 40-mile long river that begins underneath the Blue Water Bridges in Port Huron, is fed by Lake Huron at its northern end and empties into Lake St. Clair at its southern end. The St. Clair River forms the eastern boundary of St. Clair County and an international boundary between the United States and Canada. The cities of Port Huron, Marysville, St. Clair, East China, Marine City, and Algonac are along its course.

The St. Clair River contains the largest threatened Lake Sturgeon population in the Great Lakes; surrounds ten islands, six of which are land of the Canadian Walpole Island First Nation; forms the largest freshwater coastal delta in the Great Lakes; and provides drinking water to 60% of St. Clair County’s residents. For these reasons, the health of St. Clair County’s natural resources must be protected to preserve the quality of life for all people, plants and wildlife.

Our service area follows the boundaries of each watershed, rather than political boundaries of a township, city or county. We serve all the subwatersheds of the St. Clair River, which includes the Black River, Mill Creek, Pine River, Belle River, Lake Huron, and Anchor Bay.

Despite centuries of challenges, the St. Clair River today is well-known for commercial and sport walleye fishing, world-class scuba diving and duck hunting, boating and sailing, and international freighter watching. The River supports plant and animal species listed as threatened and endangered by both State and Federal agencies, including: the Spotted Turtle, Lake Sturgeon, 5 different mussel species, Mooneye, and Painted Trillium. The River also plays an integral role in the travel of migratory waterfowl and shorebirds.