Exeter WWTF - Wastewater Treatment Plant in Exeter, New Hampshire

Exeter WWTF is a municipal wastewater treatment facility located in Exeter, Rockingham County, New Hampshire. The plant serves a population of approximately 12,170 residents, placing it in the small-to-medium agglomeration category for US wastewater infrastructure. As a US facility, Exeter WWTF operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the New Hampshire Department of Environmental Services. For plants of this scale, secondary treatment is the standard requirement, with additional nutrient removal expected in sensitive watersheds like the Great Bay estuary. The plant's treated effluent is discharged into the Exeter River, which flows into the Great Bay estuary and ultimately the Gulf of Maine. This watershed supports diverse aquatic life, including migratory fish species, and is ecologically sensitive to nutrient loading from wastewater discharges.

Exeter WWTF discharges into the Exeter River, a tributary of the Squamscott River that flows into Great Bay, a tidally influenced estuary on the New Hampshire coast. Great Bay is part of the Gulf of Maine watershed and supports critical habitats for fish, shellfish, and migratory birds. The estuary is sensitive to nitrogen pollution, which can cause algal blooms and degrade water quality.