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

Warner WWTF is a municipal wastewater treatment facility located in Warner, New Hampshire, United States. The plant serves a small population of 600 residents, reflecting the rural character of the Merrimack County community. It operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal discharges to protect water quality. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 416.39 cubic meters per day and an average daily discharge of 283.91 cubic meters, the facility operates below its capacity, indicating room for future growth. As a small treatment plant, it is subject to state-level NPDES permitting administered by the New Hampshire Department of Environmental Services. The treated effluent is discharged into a local waterway that ultimately drains into the Merrimack River watershed. The Merrimack River flows southward through New Hampshire and Massachusetts before emptying into the Atlantic Ocean. The plant's location inland, more than 50 kilometers from the coast, reduces direct marine impact, but its discharge contributes to the overall health of the Merrimack River basin, which supports diverse aquatic life and recreational uses.

Warner WWTF discharges into a tributary of the Merrimack River, which flows through New Hampshire and Massachusetts to the Atlantic Ocean. The Merrimack River watershed is ecologically significant, supporting fish species such as Atlantic salmon and American shad, as well as providing drinking water for downstream communities. The plant's secondary treatment helps protect water quality in this sensitive river system by reducing organic pollutants and suspended solids before discharge.