Sainte-Catherine Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
river
pH Level
7.5
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
223.3 mg/L
Est. Daily Cost
$0.40
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 Sainte-Catherine, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Sainte-Catherine | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Sainte-Catherine compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Sainte-Catherine, Quebec | ≈ 120–179 mg/L | High | 🟠 Hard |
| Saint-Constant, Quebec | ≈ 120–179 mg/L | High | 🟠 Hard |
| Desmarchais-Crawford, Quebec | 100.5 mg/L | Medium | 🟡 Moderately Hard |
| Ville-Émard, Quebec | ≈ 60–120 mg/L | Medium | 🟡 Moderately Hard |
| Verdun, Quebec | ≈ 60–120 mg/L | Medium | 🟡 Moderately Hard |
National Benchmark
How Sainte-Catherine compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sainte-Catherine | ≈ 120–179 mg/L | 🟠 Moderate |
| Canada National Avg | 140 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Sainte-Catherine's Water Unique?
Local geology and source profile
Residents of Sainte-Catherine, Quebec, receive their drinking water from either the St. Lawrence River or a local source within the Montérégie south shore corridor. The specific treatment plants serving the municipality are not detailed, but water is drawn from these primary sources to supply the community. The Ville de Sainte-Catherine manages the distribution of this vital resource.
The water's hardness is attributed to its journey through the Montérégie south shore corridor, where it likely interacts with calcareous bedrock. This geological context results in water that registers as hard, specifically measuring 7.5 grains per gallon (gpg). This level of hardness indicates a significant concentration of dissolved minerals, primarily calcium and magnesium, picked up from the underlying rock formations.
Homeowners may notice the effects of this hard water on their plumbing and appliances. Limescale buildup can occur in pipes and fixtures, potentially reducing water flow and efficiency over time. Your water heater, dishwasher, and coffee maker might require more frequent descaling to maintain optimal performance and longevity. While it doesn't pose a health risk, using a water softener can significantly reduce scale formation, improve soap lathering, and make cleaning tasks easier for households in Sainte-Catherine.
Geology & Source: St. Lawrence River; Montérégie south shore corridor, potentially calcareous bedrock; produces hard water (7.5 gpg)
Other Quebec Water Reports
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