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

Greenville WWTF is a municipal wastewater treatment facility located on Sewer Plant Road in Greenville, New Hampshire, serving a population of approximately 1,130 residents. The plant is part of the town's infrastructure for managing domestic wastewater in this small New England community. The facility provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal plants of this scale. With a designed capacity of 882.00 million gallons per year and an actual discharge volume of 567.81 million gallons per year, the plant operates below its capacity. Regulatory oversight falls under the US EPA's National Pollutant Discharge Elimination System (NPDES) permit program, administered by the New Hampshire Department of Environmental Services. The treated effluent is discharged into a local waterway that ultimately drains into the Souhegan River, a tributary of the Merrimack River. The Merrimack River flows through southern New Hampshire and northeastern Massachusetts before reaching the Atlantic Ocean at Newburyport, MA. The plant's discharge supports the health of this watershed, which provides habitat for diverse aquatic species and recreational opportunities for surrounding communities.

The plant discharges into a local stream that flows into the Souhegan River, a tributary of the Merrimack River. The Merrimack River watershed is ecologically significant, supporting fish species such as American shad and Atlantic salmon, and providing drinking water for downstream communities. The river ultimately reaches the Atlantic Ocean, making nutrient and pollutant control important for both freshwater and marine ecosystems.