Clarence-Rockland Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
lake
pH Level
7.6
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
264.5 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 Clarence-Rockland, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Clarence-Rockland | 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 Clarence-Rockland compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Clarence-Rockland, Ontario | ≈ 120–179 mg/L | High | 🟠 Hard |
| Buckingham, Quebec | ≈ 0–60 mg/L | Medium | 🟢 Soft |
| Fallingbrook, Ontario | ≈ 120–179 mg/L | Medium | 🟠 Hard |
| Queenswood Heights, Ontario | ≈ 0–60 mg/L | Medium | 🟢 Soft |
| Orléans, Ontario | ≈ 0–60 mg/L | Medium | 🟢 Soft |
National Benchmark
How Clarence-Rockland compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Clarence-Rockland | ≈ 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 Clarence-Rockland's Water Unique?
Local geology and source profile
The City of Clarence-Rockland's drinking water system is managed by the Ontario Clean Water Agency (OCWA) on behalf of the municipality. The water supply originates from the Rockland intake on the Ottawa River, serving approximately 25,000 residents in Clarence-Rockland, Eastern Ontario, Canada, within Prescott and Russell County. This system encompasses intake, treatment, and distribution infrastructure. While a specific treatment plant name isn't provided in municipal details, regular testing confirms adherence to provincial drinking water standards. The Ontario Clean Water Agency oversees the entire process.
The water supply originates from the Ottawa River watershed, a significant river system in Eastern Ontario. Upstream, the bedrock is influenced by the Precambrian Shield, but near Clarence-Rockland, the geology shifts to Paleozoic limestone and dolostone formations. The region lies within the Ottawa Valley Lowlands, characterized by Ordovician-aged sedimentary rocks. These limestone aquifers contribute dissolved minerals to the water. This geological makeup results in a mineralised character, typical of river supplies affected by limestone runoff and groundwater inflows, leading to moderately mineralised water chemistry rather than extreme softness.
Homeowners in Clarence-Rockland may notice scale buildup in hot water appliances like kettles, dishwashers, washing machines, and water heaters, which can reduce their efficiency. You might also find that soaps don't lather as readily, and spots can appear on glassware and fixtures after washing. To combat these effects, regular descaling with vinegar is advised, alongside considering scale inhibitors. Checking for early signs of pipe encrustation is also a good practice. Given the regional geology, installing a water softener is often recommended in Ontario to help extend appliance lifespan and improve cleaning performance.
Geology & Source: Eastern Ontario carbonate; Paleozoic limestone and dolostone formations produce hard water
Other Ontario Water Reports
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