Strathroy Water Hardness & Quality Report (2026)
Water Hardness
Source
lake
pH Level
8.4
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
751.5 mg/L
Est. Daily Cost
$0.76
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 Strathroy, your appliances are currently losing 38% efficiency due to mineral buildup.
| Appliance | In Strathroy | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.1 yrs | 12 yrs | -74% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Strathroy compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Strathroy, Ontario | 285 mg/L | Very High | 🔴 Very Hard |
| Lambton Shores, Ontario | 245 mg/L | Very High | 🔴 Very Hard |
| London, Ontario | 80 mg/L | Medium | 🟡 Moderately Hard |
| St. Thomas, Ontario | 309 mg/L | Very High | 🔴 Very Hard |
| Ingersoll, Ontario | 182.5 mg/L | High | 🔴 Very Hard |
National Benchmark
How Strathroy compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Strathroy | 285 mg/L | 🔴 High |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Strathroy's Water Unique?
Local geology and source profile
Strathroy-Caradoc's drinking water is managed by Municipality of Strathroy-Caradoc, drawing from Lake Erie via regional Middlesex County water supply pipelines that transmit treated Lake Erie water to inland communities throughout southwestern Ontario. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 285 mg/L (16.6 gpg) — classified as very hard by Health Canada, with TDS of 751 mg/L and pH of 8.4 — among the hardest measured in Ontario, reflecting the exceptional mineral richness of Lake Erie's shallow carbonate-rich water.
Lake Erie is the shallowest and warmest of the Great Lakes, with a mean depth of only 19 metres — water spends significantly longer in contact with the highly soluble Silurian and Devonian dolostone and limestone bedrock of the Lake Erie basin (Michigan, Ohio, and Ontario shores) than in deeper Lakes Superior or Huron. This results in Lake Erie having the highest dissolved mineral content in the Great Lakes system — characteristic TDS above 700 mg/L, pH above 8.3, and hardness well above 250 mg/L. Strathroy's southwestern Ontario location places it within the Lake Erie supply basin, producing this characteristically very hard 285 mg/L reading.
At 285 mg/L, Strathroy homeowners face among Ontario's most severe scale challenges — kettle elements and showerheads require frequent weekly cleaning. Hot water tank elements accumulate significant scale; annual inspection and descaling treatment are strongly recommended. A whole-home water softener is a widely installed appliance in southwestern Ontario Lake Erie supply communities. The Municipality of Strathroy-Caradoc provides water quality information through municipal services at strathroy-caradoc.ca.
Geology & Source: Supplied by Strathroy-Caradoc municipality from Lake Erie via regional supply pipelines — Lake Erie water from the southwest Ontario agricultural basin, with high Lake Erie evaporite and carbonate mineral loading, produces very hard water at 285 mg/L (16.6 gpg).