St. Catharines draws municipal drinking water from Lake Erie (via Welland Canal intake near Allanburg), treated at Decew Falls Water Treatment Plant.
St. Catharines municipal drinking water starts at Lake Erie (via Welland Canal intake near Allanburg) and is treated at Decew Falls Water Treatment Plant. Lab numbers on the water page describe the published geography, not every private tap.
Niagara Region conventional plant at 2700 Decew Road, St. Catharines. Three treatment trains; combined rated capacity 227,300 m³/day. Screening, coagulation/flocculation/sedimentation, filtration, sodium hypochlorite disinfection with UV enhancement. Canal water reaches the plant by a gravity supply channel about 5.4 km long.
See the St. Catharines water page for the grade, source notes, and municipal report links.