Merrimack County Home WWTF, Boscawen, New Hampshire | Secondary Wastewater Treatment

Merrimack County Home WWTF is a municipal wastewater treatment facility located in Boscawen, New Hampshire, serving a small community of 838 residents. The plant operates under the regulatory framework of the United States Clean Water Act, which requires secondary treatment for all publicly owned treatment works. The facility provides secondary treatment, a standard biological process that removes biodegradable organic matter and suspended solids. With a designed capacity of 302.83 volume units and an average daily discharge of 170.34, the plant operates well within its capacity. As a small inland facility, it is not subject to the more stringent nutrient removal requirements often applied to coastal or large-scale plants. The treated effluent is discharged into a local water body, likely a tributary of the Merrimack River, which flows through New Hampshire and Massachusetts before reaching the Atlantic Ocean. The plant's operations help protect downstream water quality and aquatic habitats in the Merrimack River watershed.

The plant discharges into a local watercourse that drains into the Merrimack River, a major New England river that flows south to the Atlantic Ocean near Newburyport, Massachusetts. The Merrimack River watershed supports diverse aquatic life, including migratory fish species, and provides drinking water for downstream communities. The plant's secondary treatment helps reduce organic pollution and protect this ecologically important river system.