Québec Water Hardness & Quality Report (2026)
Water Hardness
~0–59 mg/L
Softestimated · not lab-verified
Source
river
pH Level
7.1
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
40.1 mg/L
Est. Daily Cost
$0.08
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 Québec, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Québec | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.2 yrs | 8.5 yrs | -4% |
| Washing Machine | 11.5 yrs | 12 yrs | -4% |
| Water Heater | 14.4 yrs | 15 yrs | -4% |
Regional Water Comparison
How Québec compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Québec, Quebec | ≈ 0–59 mg/L | Low | 🟢 Soft |
| La Cité-Limoilou, Quebec | ≈ 120–179 mg/L | High | 🟠 Hard |
| Lévis, Quebec | ≈ 60–120 mg/L | Medium | 🟡 Moderately Hard |
| Beauport, Quebec | 79.5 mg/L | Medium | 🟡 Moderately Hard |
| Les Rivières, Quebec | ≈ 0–60 mg/L | Medium | 🟢 Soft |
National Benchmark
How Québec compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Québec | ≈ 0–59 mg/L | 🟢 None |
| Canada National Avg | 140 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Québec's Water Unique?
Local geology and source profile
The Ville de Québec manages the municipal water supply for Québec City and nearby communities in the Capitale-Nationale region. The primary source is the Saint Lawrence River, drawn from Lake Saint-Charles. Water undergoes treatment at the Lake Saint-Charles Water Treatment Plant (Usine de filtration du Lac Saint-Charles) and the Louis-Hippolyte-La Fontaine plant before reaching more than 500,000 residents through a vast network of pipes.
The Saint Lawrence River watershed is immense, originating in the Great Lakes Basin. Its journey to Québec City crosses varied geological landscapes, including the Canadian Shield with its igneous and metamorphic bedrock. Closer to the city, the geology shifts to Appalachian fold belt sediments, featuring Cambrian-Ordovician shales and limestones. This region lacks extensive carbonate karst or evaporite formations, leading to very soft water with minimal mineral content.
Because Québec City's tap water is soft, you'll notice very little scale buildup on your pipes or in appliances like kettles and dishwashers. Soap lathers easily, and your skin might feel less dry after washing. On the flip side, this soft water can sometimes accelerate corrosion in older metal plumbing, potentially increasing the leaching of metals like copper or lead. A water softener isn't typically needed; instead, it's wise to watch for any signs of corrosion and consider phosphate additives or pH adjustments for added protection.
Geology & Source: Saint Lawrence River; Precambrian granitic and metamorphic rocks, Paleozoic sedimentary formations; soft water
Other Quebec Water Reports
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