Sainte-Agathe-des-Monts draws municipal drinking water from Petit Lac des Sables (Lac Grignon) , primary raw water and Lac des Sables (summer top-up pumped into Petit Lac des Sables), treated at Station de purification Ste-Agathe-des-Monts (Petit Lac des Sables).
Sainte-Agathe-des-Monts municipal drinking water starts at Petit Lac des Sables (Lac Grignon) , primary raw water and Lac des Sables (summer top-up pumped into Petit Lac des Sables) and is treated at Station de purification Ste-Agathe-des-Monts (Petit Lac des Sables). Lab numbers on the water page describe the published geography, not every private tap.
MELCC X0008112: chlorination, filtration, and carbon. Filtration plant built ~2010-2012 on the Petit Lac des Sables shore (~10,000 ft²). City also doses zinc orthophosphate corrosion inhibitor (aggressive headwater chemistry).
See the Sainte-Agathe-des-Monts water page for the grade, source notes, and municipal report links.