Courtenay Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
139.5 mg/L
Est. Daily Cost
$0.17
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 Courtenay, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Courtenay | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.5 yrs | 8.5 yrs | -12% |
| Washing Machine | 11.3 yrs | 12 yrs | -6% |
| Water Heater | 13.1 yrs | 15 yrs | -13% |
Regional Water Comparison
How Courtenay compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Courtenay, British Columbia | 63 mg/L | Medium | 🟡 Moderately Hard |
| Comox, British Columbia | 5 mg/L | Low | 🟢 Soft |
| Campbell River, British Columbia | 23.5 mg/L | Low | 🟢 Soft |
| Port Alberni, British Columbia | 66.5 mg/L | Medium | 🟡 Moderately Hard |
| Powell River, British Columbia | 17 mg/L | Low | 🟢 Soft |
National Benchmark
How Courtenay compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Courtenay | 63 mg/L | 🟡 Low |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Courtenay's Water Unique?
Local geology and source profile
Courtenay's drinking water is managed by the City of Courtenay, the commercial hub of the Comox Valley on central Vancouver Island, drawing from Comox Lake via the Comox Valley Regional District (CVRD) water treatment system. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 63 mg/L (3.7 gpg) — classified as moderately hard by Health Canada, notably harder than the typical Vancouver Island soft water supply (Campbell River 23.5 mg/L, Nanaimo 8 mg/L from batch 5), reflecting the distinctive geology of the Comox Lake watershed.
Comox Lake is a mountain reservoir in the Beaufort Range north of the Comox Valley — a geological zone where Cretaceous Nanaimo Group sandstone and shale and underlying Triassic Vancouver Group carbonate-bearing volcanic formations contribute moderate dissolved calcium to the watershed. The Beaufort Range's calcareous volcanic and sedimentary units dissolve more calcium than the purely insoluble volcanic terrain of southern and northern Vancouver Island, producing Comox Lake's moderately hard 63 mg/L supply. This is the primary reason Courtenay's water is measurably harder than most Vancouver Island communities.
At 63 mg/L, Courtenay residents experience moderate scale deposits on tap aerators and kettle elements — descaling every two to three months is adequate. Hot water tanks operate reliably at this hardness. The City of Courtenay and the CVRD provide water quality information at courtenay.ca and comoxvalleyrd.ca. Residents moving to the Comox Valley from softer-water Vancouver Island communities (Nanaimo, Campbell River) will notice a modest increase in mineral deposits.
Geology & Source: Supplied by City of Courtenay from Comox Lake via the Comox Valley water system — water from the Beaufort Range reservoir reflecting moderate carbonate and limestone geology of central Vancouver Island produces moderately hard water at 63 mg/L (3.7 gpg).