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

Troy WWTF is a municipal wastewater treatment facility located in Troy, New Hampshire, serving a population of approximately 1,200 residents. The plant provides secondary treatment, which is the standard level required for small communities under the U.S. Clean Water Act. With a designed capacity of 984.20 million gallons per year and an actual discharge volume of 299.05 million gallons per year, the plant operates well below its capacity. As a facility in the United States, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the state of New Hampshire, which set limits on effluent quality to protect receiving waters. The plant's treated effluent is discharged into a local water body that eventually drains into the Connecticut River watershed, which flows southward to Long Island Sound. This watershed supports diverse aquatic life and provides drinking water for downstream communities. The plant's secondary treatment helps reduce organic pollutants and suspended solids before discharge.

Troy WWTF discharges into a tributary of the Connecticut River, which flows through New Hampshire and Vermont before emptying into Long Island Sound. The Connecticut River watershed is a vital ecological corridor supporting fish species such as Atlantic salmon and American shad, as well as diverse bird and mammal populations. The plant's secondary treatment helps maintain water quality in this sensitive river system.