Dolbeau-Mistassini Water Hardness & Quality Report (2026)
Water Hardness
Source
river
pH Level
7.4
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
112.8 mg/L
Est. Daily Cost
$0.14
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 Dolbeau-Mistassini, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Dolbeau-Mistassini | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.6 yrs | 12 yrs | -3% |
| Water Heater | 13.5 yrs | 15 yrs | -10% |
Regional Water Comparison
How Dolbeau-Mistassini compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Dolbeau-Mistassini, Quebec | 53 mg/L | Low | 🟢 Soft |
| Saint-Félicien, Quebec | 17 mg/L | Low | 🟢 Soft |
| Roberval, Quebec | 26 mg/L | Low | 🟢 Soft |
| Sainte-Monique, Quebec | 13.5 mg/L | Low | 🟢 Soft |
| Alma, Quebec | 51 mg/L | Low | 🟢 Soft |
National Benchmark
How Dolbeau-Mistassini compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Dolbeau-Mistassini | 53 mg/L | 🟢 None |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Dolbeau-Mistassini's Water Unique?
Local geology and source profile
Dolbeau-Mistassini's drinking water is managed by the Ville de Dolbeau-Mistassini, drawing from the Rivière Mistassini — Dolbeau-Mistassini is a city at the northwest corner of Lac Saint-Jean in the Saguenay–Lac-Saint-Jean region, formed by the merger of the sister cities of Dolbeau (a pulp and paper mill town on the Rivière Mistassini founded by the Price Brothers Company) and Mistassini (home to the legendary Chicoutimi Chocolate Festival and a significant Innu Nation community presence), deep in the boreal Shield heartland of northern Quebec. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 53 mg/L (3.1 gpg) — classified as soft by Health Canada, consistent with the ultra-soft northern Laurentian Shield river watershed character.
The Rivière Mistassini drains the vast Laurentian Plateau north of Lac Saint-Jean — from the Hudson Bay–St. Lawrence divide through the deep Shield country of the Grenville Province Archean and Proterozoic gneisses and granites of the northern Saguenay–Lac-Saint-Jean watershed, producing near-zero mineral dissolution in the pristine boreal forest and exposed Shield terrain. The 53 mg/L for the Mistassini River supply is slightly higher than the pure Lac Saint-Jean shoreline (13.5 mg/L at Sainte-Monique from batch 28), reflecting the longer drainage path that gathers marginal mineral input from glacial carbonates in the northern Shield boreal terrain.
With 53 mg/L, Dolbeau-Mistassini homes are essentially scale-free — occasional kettle cleaning every three months is adequate. Hot water tanks have an excellent operational lifespan. Water quality reports are published following Ministère de l'Environnement standards. Health Canada lead precautionary guidance applies to pre-1975 properties in the historic Dolbeau and Mistassini mill-town heritage districts on the Rivière Mistassini.
Geology & Source: Supplied by the Ville de Dolbeau-Mistassini from the Rivière Mistassini — the Dolbeau-Mistassini supply from the northern Laurentian Shield Mistassini watershed produces soft water at 53 mg/L (3.1 gpg), consistent with the ultra-soft Saguenay–Lac-Saint-Jean Shield river character.