Saint-Hyacinthe Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
river
pH Level
7.7
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
298.8 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 Saint-Hyacinthe, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Saint-Hyacinthe | 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 Saint-Hyacinthe compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Saint-Hyacinthe, Quebec | ≈ 120–179 mg/L | High | 🟠 Hard |
| Mont-Saint-Hilaire, Quebec | ≈ 120–179 mg/L | High | 🟠 Hard |
| Beloeil, Quebec | ≈ 120–179 mg/L | Medium | 🟠 Hard |
| Granby, Quebec | ≈ 60–120 mg/L | Medium | 🟡 Moderately Hard |
| Saint-Basile-le-Grand, Quebec | ≈ 60–120 mg/L | Medium | 🟡 Moderately Hard |
National Benchmark
How Saint-Hyacinthe compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Saint-Hyacinthe | ≈ 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 Saint-Hyacinthe's Water Unique?
Local geology and source profile
The drinking water for Saint-Hyacinthe, Quebec, is sourced from the Rivière Yamaska. While specific reservoirs, aquifers, or treatment plant names were not detailed, the municipal public works department, operating under Ville de Saint-Hyacinthe, manages the supply for the city and surrounding areas in the Montérégie region. The Yamaska River basin forms the watershed, which lies within southern Quebec's St. Lawrence Lowlands and borders the Appalachian foothills.
This water originates from a region characterized by sedimentary rock formations dating back to the Paleozoic era. Layers of limestone and shale, typical of the St. Lawrence Lowlands, are present. The natural dissolution of minerals from these carbonate-rich geological layers is what gives the water its moderately hard character.
Homeowners in Saint-Hyacinthe may notice scale buildup forming in pipes, appliances like dishwashers, and water heaters, which can reduce their efficiency and shorten their lifespan. Soap scum can also be an issue in showers, and laundry might not feel as clean as it could. To combat these effects, regular descaling of appliances is a good practice, and installing a water softener is often recommended for households.
Geology & Source: Rivière Yamaska watershed; Appalachian limestone foothills and St. Lawrence Lowlands sedimentary rocks produce moderate hardness
Other Quebec Water Reports
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