Lawrence Park North Water Hardness & Quality Report (2026)
Water Hardness
Source
lake
pH Level
8.2
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
594.1 mg/L
Est. Daily Cost
$0.63
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 Lawrence Park North, your appliances are currently losing 31% efficiency due to mineral buildup.
| Appliance | In Lawrence Park North | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.8 yrs | 8.5 yrs | -79% |
| Washing Machine | 4.9 yrs | 12 yrs | -59% |
| Water Heater | 6.2 yrs | 15 yrs | -59% |
Regional Water Comparison
How Lawrence Park North compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Lawrence Park North, Ontario | 235.5 mg/L | Very High | 🔴 Very Hard |
| Lawrence Park South, Ontario | 236.5 mg/L | Very High | 🔴 Very Hard |
| Bedford Park-Nortown, Ontario | 238 mg/L | Very High | 🔴 Very Hard |
| Toronto, Ontario | 124 mg/L | High | 🟠 Hard |
| Yonge-Eglinton, Ontario | 238 mg/L | Very High | 🔴 Very Hard |
National Benchmark
How Lawrence Park North compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lawrence Park North | 235.5 mg/L | 🔴 High |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Lawrence Park North's Water Unique?
Local geology and source profile
Lawrence Park North (a Toronto midtown neighbourhood between Eglinton and Lawrence Avenues — the northern section of Toronto's distinguished Lawrence Park residential district, characterised by large pre-war and post-war detached homes on the ravine-edge streets between Bayview and Yonge, adjacent to the Toronto French School, the Granite Club, and the Lawrence Park Collegiate, one of the city's most treasured residential landscapes with the deep ravine valleys threading through the neighbourhood east toward the Don Valley) 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 235.5 mg/L (13.8 gpg) — classified as very hard by Health Canada, consistent with the midtown North Toronto supply corridor.
Lawrence Park North receives R.C. Harris plant Lake Ontario supply through the Yonge–Eglinton midtown distribution — the same characteristically very hard Lake Ontario source (dissolved Silurian and Devonian carbonate from the Great Lakes basin) as all Toronto boroughs. The 235.5 mg/L is virtually identical to the adjacent Lawrence Park South (236.5 mg/L) and Willowdale West (234.5 mg/L) in the Lawrence–Eglinton North Toronto distribution corridor.
At 235.5 mg/L, Lawrence Park North homeowners face persistent scale challenges in their large estate and detached homes — monthly to bimonthly kettle and showerhead descaling is typical, and premium appliances in these well-appointed residences benefit from more frequent maintenance. The City of Toronto provides water quality information at toronto.ca/water. Health Canada lead service line precautionary guidance applies to Lawrence Park North's pre-war and early post-war housing stock, and homeowners in the established 1920s–1940s streets should consult the City's lead service line replacement programme.
Geology & Source: Supplied by City of Toronto from Lake Ontario via the R.C. Harris Water Treatment Plant — the Lawrence Park North Toronto midtown distribution zone carries very hard water at 235.5 mg/L (13.8 gpg), consistent with the Eglinton–Lawrence North Toronto supply corridor.