Fairfield WPCF - Wastewater Treatment Plant in Fairfield, Connecticut

Fairfield WPCF is a municipal wastewater treatment facility located in Fairfield, Connecticut, United States. It serves a population of approximately 54,140 residents, placing it in the medium agglomeration category. The plant is situated near the coast of Long Island Sound, a major estuary on the Atlantic coast. As a facility in the United States, Fairfield WPCF operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting. For a plant serving this population size, secondary treatment is typically required, with additional nutrient removal expected in sensitive coastal areas like Long Island Sound. The designed capacity is 1.00 million gallons per day, indicating the plant's scale. The plant's treated effluent is discharged into local rivers or streams that flow into Long Island Sound, a vital estuary supporting diverse marine life, including shellfish, finfish, and migratory birds. The Sound's ecological health depends on controlling nutrient loads, making the plant's treatment performance important for preventing eutrophication and hypoxia in the water body.

Fairfield WPCF discharges into the Long Island Sound watershed, a major estuary that receives drainage from Connecticut and New York. The Sound is a critical habitat for species such as lobsters, winter flounder, and migratory shorebirds. Nutrient pollution from wastewater can contribute to algal blooms and low-oxygen zones, so the plant's treatment level is essential for maintaining water quality in this ecologically sensitive coastal ecosystem.