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

Hopkinton WWTF is a municipal wastewater treatment facility located in Hopkinton, New Hampshire, United States. The plant serves a small population of 600 residents in the Contoocook area of Merrimack County. It operates as a secondary treatment facility, meeting standard regulatory requirements for communities of this scale. The plant has a designed capacity of 454.25 cubic meters per day and currently discharges an average of 189.27 cubic meters per day. As a facility in the United States, it 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. Secondary treatment is the minimum required for municipal plants under federal regulations. The treated effluent from Hopkinton WWTF is discharged into local waterways that ultimately drain into the Merrimack River watershed. The Merrimack River flows south through New Hampshire and Massachusetts before emptying into the Atlantic Ocean. The plant plays a key role in protecting water quality in the Contoocook River and downstream ecosystems.

The plant discharges into the Contoocook River, a tributary of the Merrimack River. The Merrimack River watershed supports diverse aquatic life and provides drinking water for downstream communities. The river flows into the Atlantic Ocean via the Merrimack River estuary in Massachusetts. Protecting water quality in this watershed is important for regional ecological health and recreational uses.