Acton Wastewater Collection System - Marlborough, Massachusetts Secondary Treatment Plant

The Acton Wastewater Collection System serves the community of Marlborough, Massachusetts, as part of the state's wastewater infrastructure. With a population served of 1,971, it is classified as a small-scale treatment facility. The plant is located at 506 Boston Post Road West in Middlesex County. The facility provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater plants. Secondary treatment typically involves biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 757.08 cubic meters per day and discharges a similar volume, indicating full utilization of its capacity. The treated effluent is discharged into local waterways that ultimately drain into the Atlantic Ocean via the Assabet River and Merrimack River systems. The plant plays a role in protecting downstream aquatic ecosystems, including the Merrimack River watershed, which supports diverse fish populations and recreational uses.

The plant discharges into the Assabet River watershed, which flows into the Merrimack River and eventually reaches the Atlantic Ocean. The Merrimack River is a major waterway in New England, supporting diverse aquatic life including migratory fish species. The plant's secondary treatment helps reduce nutrient and pollutant loads, protecting downstream water quality in this ecologically sensitive region.