West Swanzey WWTF - Secondary Wastewater Treatment in Swanzey, New Hampshire

West Swanzey WWTF is a municipal wastewater treatment facility located in Swanzey, New Hampshire, serving a population of 989. The plant provides secondary treatment, a standard level for small communities in the United States, ensuring removal of organic matter and suspended solids before discharge. The plant has a designed capacity of 632.16 volume units and an average daily discharge of 264.98 volume units, indicating it operates well below its capacity. As a U.S. facility, it is subject to the Clean Water Act and state-level permits issued by the New Hampshire Department of Environmental Services, which set effluent limits to protect water quality. The treated effluent is discharged to a nearby water body, likely a tributary of the Ashuelot River, which flows into the Connecticut River and eventually Long Island Sound. This watershed supports diverse aquatic life and recreational uses, making proper treatment essential for downstream ecosystems.

The plant discharges into a local stream that drains into the Ashuelot River, a tributary of the Connecticut River. The Connecticut River flows south to Long Island Sound, an ecologically productive estuary. The watershed supports fish species such as Atlantic salmon and American shad, and the plant's secondary treatment helps maintain water quality for these habitats.