Woodsville WWTF - Secondary Wastewater Treatment in Haverhill, New Hampshire

Woodsville WWTF is a municipal wastewater treatment facility located in the Woodsville village of Haverhill, New Hampshire, United States. The plant serves a population of approximately 2,500 people, reflecting its role as a small community treatment system in the Upper Connecticut River Valley. The plant provides secondary treatment, a standard level for communities of this size under the U.S. Clean Water Act. With a designed capacity of 1,230.26 and an average daily discharge volume of 670.02, the facility operates well within its capacity. As a U.S. plant, it operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the New Hampshire Department of Environmental Services, which sets effluent limits to protect receiving waters. The treated effluent from Woodsville WWTF discharges to a tributary of the Connecticut River, which flows southward through New Hampshire and Vermont into Long Island Sound. The plant's operations help maintain water quality in the Connecticut River basin, a critical habitat for migratory fish such as Atlantic salmon and American shad, and support recreational uses downstream.

The plant discharges into a tributary of the Connecticut River, which flows through New Hampshire and Vermont before emptying into Long Island Sound. The Connecticut River basin supports diverse aquatic life, including migratory fish species and freshwater mussels. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream ecosystems and recreational water quality.