Milton WWTF - Secondary Wastewater Treatment Plant in Milton, New Hampshire

Milton WWTF is a municipal wastewater treatment facility located in Milton, New Hampshire, United States. The plant serves a population of approximately 1,289 residents, making it a small-scale facility within the state's wastewater infrastructure. The plant provides secondary treatment, a standard level required by the U.S. Clean Water Act for most municipal facilities. With a designed capacity of 378.54 thousand gallons per day and an average discharge volume of 325.55 thousand gallons per day, the plant operates below its capacity, indicating room for future growth. The treated effluent is discharged into a local waterway that ultimately drains into the Salmon Falls River, part of the Piscataqua River watershed, which flows into the Gulf of Maine. The plant plays a key role in protecting the water quality of this coastal river system and the downstream estuarine environment.

The plant's discharge enters a tributary of the Salmon Falls River, which flows into the Piscataqua River estuary and eventually the Gulf of Maine. This watershed supports diverse aquatic life, including migratory fish species, and is ecologically sensitive due to its tidal influence and proximity to coastal habitats. The secondary treatment process helps reduce organic pollutants and suspended solids, mitigating impacts on the downstream ecosystem.