Oak Bay Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
41.8 mg/L
Est. Daily Cost
$0.06
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 Oak Bay, your appliances are currently losing 3% efficiency due to mineral buildup.
| Appliance | In Oak Bay | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.8 yrs | 8.5 yrs | — |
| Washing Machine | 12.7 yrs | 12 yrs | — |
| Water Heater | 14.6 yrs | 15 yrs | -3% |
Regional Water Comparison
How Oak Bay compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Oak Bay, British Columbia | 24 mg/L | Low | 🟢 Soft |
| Shelbourne, British Columbia | 88 mg/L | Medium | 🟡 Moderately Hard |
| Gordon Head, British Columbia | 41 mg/L | Low | 🟢 Soft |
| Fernwood, British Columbia | 87.5 mg/L | Medium | 🟡 Moderately Hard |
| Victoria, British Columbia | 4 mg/L | Low | 🟢 Soft |
National Benchmark
How Oak Bay compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Oak Bay | 24 mg/L | 🟢 None |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Oak Bay's Water Unique?
Local geology and source profile
Oak Bay's drinking water is managed by the Township of Oak Bay, receiving supply from the Capital Regional District (CRD) Sooke Lake regional water system — Oak Bay is one of Greater Victoria's most prestigious municipalities, on the southeastern tip of the Saanich Peninsula adjacent to Victoria's waterfront, known for its Edwardian character, Willows Beach, the Oak Bay Marina, and the historic Windsor Hotel. Water is treated at the Sooke Lake Water Treatment Plant using ozonation, biofiltration, UV disinfection, and chloramination, fully meeting the Guidelines for Canadian Drinking Water Quality (GCDWQ). Hardness in the Oak Bay distribution sub-zone is 24 mg/L (1.4 gpg) — classified as soft by Health Canada, with TDS of 41.8 mg/L — exceptionally soft relative to other CRD sub-zones (Carey 87.5 mg/L, Gordon Head 41 mg/L).
Oak Bay's 24 mg/L is notably softer than other Greater Victoria CRD communities — the lowest reading across the CRD sub-zones documented in this dataset. The variation across CRD distribution sub-zones (24–87.5 mg/L) reflects either distinct distribution routing through the Oak Bay transmission infrastructure or a specific sub-zone blending characteristic. The Sooke Lake watershed produces essentially mineral-free water at its granitic and volcanic source; the 24 mg/L at Oak Bay suggests the distribution branch serving this municipality retains much more of the source water's original softness than higher-hardness CRD sub-zones further from the treatment plant in the distribution chain.
With 24 mg/L of hardness, Oak Bay homes — in one of Victoria's most beautiful and exclusive heritage residential municipalities — are entirely scale-free. Appliances and plumbing require no descaling. The CRD provides water quality information at crd.bc.ca/water. Oak Bay's exceptional Edwardian heritage housing stock — many homes built before 1940 along the Tweed Curtain streets near the Marina — includes significant pre-war properties where Health Canada lead service line precautionary guidance is particularly applicable given the corrosive nature of this very soft, low-TDS supply.
Geology & Source: Supplied by the Capital Regional District (CRD) from the Sooke Lake and Goldstream watershed — the Oak Bay CRD distribution sub-zone records an exceptionally soft supply at 24 mg/L (1.4 gpg), among the softest measured readings in the Greater Victoria distribution network.