Limerick WWTF - Secondary Wastewater Treatment Plant in Limerick, Maine

Limerick WWTF is a municipal wastewater treatment facility located in Limerick, York County, Maine. Serving a population of 624, the plant provides secondary treatment to domestic wastewater from the community. The facility's designed capacity is 416.39 million gallons per year, with an actual discharge volume of 227.13 million gallons per year. As a secondary treatment plant, Limerick WWTF meets the minimum requirements of the US Clean Water Act for municipal wastewater treatment. The plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. Plants of this scale in Maine are typically regulated by the Maine Department of Environmental Protection. The treated effluent from Limerick WWTF is discharged to a local water body that ultimately drains into the Atlantic Ocean via the Saco River watershed. The plant's location, about 50 km from the coast, places it within a region where water quality management is important for both freshwater ecosystems and downstream coastal environments.

Limerick WWTF discharges into a tributary of the Saco River, which flows into the Atlantic Ocean at Saco Bay. The Saco River watershed supports diverse aquatic life, including migratory fish species such as Atlantic salmon and river herring. The plant's secondary treatment helps reduce nutrient and organic pollutant loads, protecting downstream water quality in the river and coastal zone.