Sept-Îles drinking water path

Source

Lac des Rapides (intake in Baie des Crans) Surface water

to plant

Treatment

Centrale de traitement d'eau Sept-Îles chlorination · filtration

finished

Mains

Distribution Lake ~10–12 km NW of urban core; also smaller satellite systems (Moisie, Gallix, Clarke City rechlorination).

drinking water

Tap

Household tap Sept-Îles

Source & supply
Lac des Rapides (intake in Baie des Crans)
Lake ~10–12 km NW of urban core; also smaller satellite systems (Moisie, Gallix, Clarke City rechlorination).
Lac des Rapides' natural organics drove a switch from free chlorine to chloramine in 2025 to control disinfection by-products.
Treatment
Centrale de traitement d'eau Sept-Îles
Filtration, corrosion control, chlorination historically; chloramine disinfection commissioned Oct 2025 to cut THMs from high-organic lake water.
Treatment on record: chlorination · filtration
At the tap
Hardness 209 mg/L (Very hard)
Grade B (Good)
pH 7.2 · lead 0.1 μg/L
ECCC / municipal open data (seed)