Roberval Water Hardness & Quality Report (2026)
Water Hardness
Source
river
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
46.8 mg/L
Est. Daily Cost
$0.07
energy & soap waste
Source: Health Canada Water Quality · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Roberval, your appliances are currently losing 3% efficiency due to mineral buildup.
| Appliance | In Roberval | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.7 yrs | 8.5 yrs | — |
| Washing Machine | 12.6 yrs | 12 yrs | — |
| Water Heater | 14.6 yrs | 15 yrs | -3% |
Regional Water Comparison
How Roberval compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Roberval, Quebec | 26 mg/L | Low | 🟢 Soft |
| Saint-Félicien, Quebec | 17 mg/L | Low | 🟢 Soft |
| Dolbeau-Mistassini, Quebec | 53 mg/L | Low | 🟢 Soft |
| Sainte-Monique, Quebec | 13.5 mg/L | Low | 🟢 Soft |
| Alma, Quebec | 51 mg/L | Low | 🟢 Soft |
National Benchmark
How Roberval compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Roberval | 26 mg/L | 🟢 None |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Roberval's Water Unique?
Local geology and source profile
Roberval's drinking water is managed by the Ville de Roberval, drawing from Lac Saint-Jean or the Ouiatchouan River — Roberval is a city on the south shore of Lac Saint-Jean in the Saguenay–Lac-Saint-Jean region, the starting point of the legendary Traversée internationale du lac Saint-Jean (the world's toughest open-water swimming race, crossing the 32 km width of Lac Saint-Jean annually since 1955), a city with a rich Québécois heritage on the south shore of the Lac Saint-Jean agri-cultural basin, home to the Roberval Couvent heritage building and the Lac Saint-Jean Velo bicycle trail around the lake's full 240 km circumference. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 26 mg/L (1.5 gpg) — classified as soft by Health Canada, with TDS of only 46.8 mg/L — consistent with the ultra-pure Lac Saint-Jean Precambrian Shield supply.
Roberval draws from Lac Saint-Jean — the lake is fed by several Laurentian Shield rivers including the Péribonka, Mistassini, Ashuapmushuan, and Ouiatchouan, all draining the Precambrian Grenville Province granitic gneiss and Proterozoic plutonic rocks of the Chibougamau highlands. The 26 mg/L is very similar to Saint-Félicien (17 mg/L from this batch) across the lake, confirming the consistent ultra-soft Lac Saint-Jean Shield supply throughout the region. The slight difference (17 vs 26 mg/L) reflects different intake locations and local sub-watershed influences. Water quality reports are published under Ministère de l'Environnement oversight.
With 26 mg/L, Roberval homes are completely scale-free — no descaling is needed. Hot water tanks and appliances have an outstanding operational lifespan. Health Canada lead and copper precautionary guidance applies, as the ultra-soft water significantly increases corrosive potential for metallic plumbing. Pre-1975 properties in the historic Roberval lakefront residential area should have lead service lines assessed.
Geology & Source: Supplied by the Ville de Roberval from Lac Saint-Jean or the Ouiatchouan River — the Roberval supply from the Saguenay-Lac-Saint-Jean Laurentian Shield produces extremely soft water at 26 mg/L (1.5 gpg), with TDS of only 46.8 mg/L, reflecting the ultra-pure Precambrian Shield character of the Lac Saint-Jean basin.