Lisbon WWTF: Secondary Wastewater Treatment in Lisbon, New Hampshire

Lisbon WWTF is a municipal wastewater treatment facility located on Bath Road in Lisbon, New Hampshire, serving a population of approximately 1,638 residents. The plant provides secondary treatment, a standard level for communities of this size in the United States, ensuring that pollutants are reduced before discharge. The plant has a designed capacity of 1,211.33 thousand gallons per day and currently treats an average daily flow of 658.66 thousand gallons per day. As a secondary treatment facility, it meets the requirements of the US Clean Water Act, which mandates such treatment for municipal plants to protect water quality. The plant's operations are likely overseen by the New Hampshire Department of Environmental Services under a National Pollutant Discharge Elimination System (NPDES) permit. Treated effluent from Lisbon WWTF is discharged into the Ammonoosuc River, a tributary of the Connecticut River, which flows into Long Island Sound. The plant plays a key role in protecting the local watershed and downstream ecosystems, including fish habitats and recreational waters in the Connecticut River basin.

The plant discharges into the Ammonoosuc River, which flows into the Connecticut River and ultimately reaches Long Island Sound. This watershed supports diverse aquatic life, including migratory fish species, and provides drinking water and recreation for downstream communities. The plant's secondary treatment helps reduce nutrient loading and protect water quality in this ecologically sensitive river system.