Sainte-Marie draws municipal drinking water from Rivière Chaudière (permanent intake; two submerged screens ~2.4 m depth at 1065 rue Notre-Dame Sud), treated at Installation de production Sainte-Marie (X2134730).
Sainte-Marie municipal drinking water starts at Rivière Chaudière (permanent intake; two submerged screens ~2.4 m depth at 1065 rue Notre-Dame Sud) and is treated at Installation de production Sainte-Marie (X2134730). Lab numbers on the water page describe the published geography, not every private tap.
City vulnerability report (2026): screening, coagulation/flocculation, sedimentation, ozonation, UV reactors, then chlorine gas disinfection and caustic soda pH adjustment. Feeds Saint-Joseph and Bisson reservoirs. MELCC lists chlorination, filtration, ozonation, and ultraviolet.
See the Sainte-Marie water page for the grade, source notes, and municipal report links.