South Riverdale 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
597.1 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 South Riverdale, your appliances are currently losing 32% efficiency due to mineral buildup.
| Appliance | In South Riverdale | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.8 yrs | 8.5 yrs | -79% |
| Washing Machine | 4.8 yrs | 12 yrs | -60% |
| Water Heater | 6.1 yrs | 15 yrs | -59% |
Regional Water Comparison
How South Riverdale compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ South Riverdale, Ontario | 237.5 mg/L | Very High | 🔴 Very Hard |
| North Riverdale, Ontario | 238.5 mg/L | Very High | 🔴 Very Hard |
| Regent Park, Ontario | 246 mg/L | Very High | 🔴 Very Hard |
| Greenwood-Coxwell, Ontario | 254.5 mg/L | Very High | 🔴 Very Hard |
| Woodbine Corridor, Ontario | 254.5 mg/L | Very High | 🔴 Very Hard |
National Benchmark
How South Riverdale compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ South Riverdale | 237.5 mg/L | 🔴 High |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes South Riverdale's Water Unique?
Local geology and source profile
South Riverdale (an eclectic east-end Toronto neighbourhood below Gerrard Street East, bounded by the Don River, the Lakeshore, and Leslie Street — known for its artist studios, Leslieville coffee shops, and diverse mix of Victorian housing and former industrial lofts) receives its drinking water from the City of Toronto, drawing from Lake Ontario via the R.C. Harris Water Treatment Plant on Kingston Road. 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 237.5 mg/L (13.9 gpg) — classified as very hard by Health Canada, with TDS of 597 mg/L.
South Riverdale receives R.C. Harris plant Lake Ontario supply through the east-downtown Toronto distribution network — the same very hard Lake Ontario source (dissolved Silurian and Devonian carbonate from the Great Lakes basin) that supplies all Toronto boroughs. The 237.5 mg/L is consistent with the broader Leslieville–Riverdale–Beaches corridor, sharing the characteristically very hard supply of east Toronto's lakeshore distribution zones.
At 237.5 mg/L, South Riverdale residents face persistent scale build-up on kettle elements and showerheads — descaling every one to two weeks is standard. The neighbourhood's large stock of Victorian and Edwardian working-class houses, now among Toronto's most gentrified properties, includes many pre-1940 homes where the City of Toronto's lead service line replacement programme is particularly relevant. Residents are encouraged to review lead service line status through the programme at toronto.ca/water, as South Riverdale's heritage housing stock carries a meaningful proportion of original lead service lines serving this desirable east-end neighbourhood.
Geology & Source: Supplied by City of Toronto from Lake Ontario via the R.C. Harris Water Treatment Plant — the South Riverdale east downtown Toronto distribution zone carries very hard water at 237.5 mg/L (13.9 gpg).