West Hill Water Hardness & Quality Report (2026)
Water Hardness
Source
lake
pH Level
8.4
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
738.1 mg/L
Est. Daily Cost
$0.72
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 West Hill, your appliances are currently losing 36% efficiency due to mineral buildup.
| Appliance | In West Hill | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.6 yrs | 12 yrs | -70% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How West Hill compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ West Hill, Ontario | 269.5 mg/L | Very High | 🔴 Very Hard |
| Highland Creek, Ontario | 258 mg/L | Very High | 🔴 Very Hard |
| Centennial Scarborough, Ontario | 232.5 mg/L | Very High | 🔴 Very Hard |
| Morningside, Ontario | 250 mg/L | Very High | 🔴 Very Hard |
| Rouge, Ontario | 172 mg/L | High | 🟠 Hard |
National Benchmark
How West Hill compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ West Hill | 269.5 mg/L | 🔴 High |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes West Hill's Water Unique?
Local geology and source profile
West Hill (a residential community in far-east Scarborough, Toronto, near Kingston Road and Morningside Avenue — adjacent to the Pickering/Durham Region boundary and the Highland Creek) receives its drinking water from the City of Toronto, drawing from Lake Ontario via the R.C. Harris Water Treatment Plant. Water is treated using ozonation, biofiltration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) standards. Hardness in this distribution zone is 269.5 mg/L (15.7 gpg) — classified as very hard by Health Canada, with TDS of 738 mg/L and elevated pH of 8.4 — notably harder than the typical Toronto-wide range of 230–240 mg/L, making West Hill one of Toronto's hardest measured sub-zones.
West Hill's elevated 269.5 mg/L with high TDS of 738 mg/L is significantly harder than the typical R.C. Harris distribution zone values — an unusual characteristic for this far-east Scarborough community. West Hill's position at the extreme eastern boundary of Toronto, adjacent to the Durham Region (Ajax 166.5 mg/L, Bowmanville 201 mg/L from eastern Lake Ontario), may reflect a supply blend that incorporates eastern Lake Ontario source water with a higher carbonate and evaporite mineral load compared to the western Lake Ontario source supplying the rest of Toronto.
At 269.5 mg/L, West Hill homeowners face among Toronto's most severe scale challenges — kettle elements and showerheads require frequent weekly descaling. Hot water tanks accumulate scale rapidly; annual inspection and flushing are strongly recommended. Residents in this far-east Scarborough community near the Toronto–Pickering boundary are encouraged to review zone-specific water quality data at toronto.ca/water and to consider point-of-use water treatment options given the elevated hardness and TDS.
Geology & Source: Supplied by City of Toronto from Lake Ontario via the R.C. Harris Water Treatment Plant — the West Hill far-east Scarborough distribution zone measures very hard water at 269.5 mg/L (15.7 gpg), notably harder than central Toronto and reflecting proximity to the Durham Region Lake Ontario supply corridor.