Stittsville Water Hardness & Quality Report (2026)
Water Hardness
180+ mg/L
Very Hardestimated · not lab-verified
Source
lake
pH Level
8
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
367.4 mg/L
Est. Daily Cost
$0.91
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 Stittsville, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Stittsville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Stittsville compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Stittsville, Ontario | ≈ 180+ mg/L | Very High | 🔴 Very Hard |
| Kanata, Ontario | ≈ 0–60 mg/L | Medium | 🟢 Soft |
| Aylmer, Quebec | ≈ 60–120 mg/L | Medium | 🟡 Moderately Hard |
| Nepean, Ontario | ≈ 0–60 mg/L | Medium | 🟢 Soft |
| Le Plateau, Quebec | ≈ 60–120 mg/L | Medium | 🟡 Moderately Hard |
National Benchmark
How Stittsville compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Stittsville | ≈ 180+ mg/L | 🔴 High |
| Canada National Avg | 140 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Stittsville's Water Unique?
Local geology and source profile
Ottawa Water Services Branch supplies drinking water to Stittsville, a southwestern ward of Ottawa, Ontario, Canada. Unlike the city's main surface water sources, Stittsville's supply comes predominantly from local municipal wells. These wells tap into Ottawa Valley groundwater aquifers, which are then treated at facilities such as the Carleton Heights Water Treatment Plant or specialized wellhead treatment sites. The service area extends across Stittsville and neighboring communities in Ottawa's west end, forming part of the greater National Capital Region. The groundwater itself originates from the Ottawa Valley aquifer system, indirectly influenced by the Rideau River watershed.
The local geology is characterized by Paleozoic limestone and dolomite formations, including the Oxfordian and Lindsay formations. These rock layers are notably karstic and highly soluble, meaning they readily dissolve and release minerals into the groundwater. This process contributes significantly to the water's mineral content, resulting in a very hard supply that is typical for well water throughout the Ottawa Valley region. This contrasts with the softer water drawn from rivers used for central Ottawa's supply.
This very hard water can lead to noticeable scale buildup on plumbing fixtures, impacting water pressure and the efficiency of appliances like tankless water heaters, dishwashers, washing machines, and kettles. Homeowners often see white, chalky deposits on faucets, showerheads, and glassware. You'll find that soap doesn't lather as well, and laundry may come out feeling stiff. Routine maintenance, such as descaling with vinegar or commercial products, is recommended. To effectively protect your plumbing and appliances from the persistent accumulation of minerals, installing a water softener is strongly advised. The city ensures Ottawa's drinking water, including Stittsville's, meets or surpasses Health Canada guidelines, with a typical pH range of 7.5–8.5 for effective distribution.
Geology & Source: Paleozoic limestone and dolomite; karstic and soluble carbonate rocks from Beekmantown and Black River Groups impart high hardness
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