Cowansville Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
river
pH Level
7.4
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
193.3 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 Cowansville, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Cowansville | 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 Cowansville compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Cowansville, Quebec | ≈ 120–179 mg/L | High | 🟠 Hard |
| Granby, Quebec | ≈ 60–120 mg/L | Medium | 🟡 Moderately Hard |
| Farnham, Quebec | ≈ 120–179 mg/L | High | 🟠 Hard |
| Saint-Hyacinthe, Quebec | ≈ 120–179 mg/L | High | 🟠 Hard |
| Saint-Jean-sur-Richelieu, Quebec | ≈ 120–179 mg/L | Medium | 🟠 Hard |
National Benchmark
How Cowansville compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Cowansville | ≈ 120–179 mg/L | 🟠 Moderate |
| Canada National Avg | 140 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
Bring Vancouver-quality water to your Cowansville home
Shop water softeners on Amazon.com →
What Makes Cowansville's Water Unique?
Local geology and source profile
The Ville de Cowansville operates the municipal water supply, drawing from the Yamaska River. This river, a significant tributary system, drains the Brome-Missisquoi watershed in Quebec's Eastern Townships. Water from the Yamaska River undergoes treatment at a facility to meet federal safety standards before it's distributed to residents throughout the Cowansville Brome-Missisquoi Estrie service area. The Yamaska River itself is a key source for the region's water needs.
The Yamaska River watershed's underlying geology consists of Appalachian carbonate-bearing rock formations, rich with limestone and dolomite deposits. As water moves through this terrain, it naturally dissolves substantial amounts of calcium and magnesium carbonates from these rocks. This geological interaction is the primary reason Cowansville's water supply is characterized as hard, reflecting the mineral content inherent to the local carbonate bedrock.
Homeowners in Cowansville will likely observe mineral buildup within their plumbing systems and see scale deposits forming on faucets and fixtures. Appliances like dishwashers and washing machines, along with water heaters, may experience reduced efficiency and a shortened lifespan due to this hardness. You might also notice less lather from soaps and detergents and potential spotting on dishes after washing. To combat these issues and prolong the life of your appliances, installing a water softener is a practical solution. It's important to remember that this hardness level is verified as safe for consumption by Health Canada and poses no health risks.
Geology & Source: Yamaska River watershed; Appalachian carbonate terrain with limestone and dolomite formations dissolve calcium and magnesium, producing hard water
Other Quebec Water Reports
Report an Issue
Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.
All reports are reviewed by our team. Thank you for supporting data quality!