Woburn Water Hardness & Quality Report (2026)
Water Hardness
Source
lake
pH Level
8.2
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
616.2 mg/L
Est. Daily Cost
$0.64
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 Woburn, your appliances are currently losing 32% efficiency due to mineral buildup.
| Appliance | In Woburn | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.7 yrs | 8.5 yrs | -80% |
| Washing Machine | 4.7 yrs | 12 yrs | -61% |
| Water Heater | 6 yrs | 15 yrs | -60% |
Regional Water Comparison
How Woburn compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Woburn, Ontario | 240.5 mg/L | Very High | 🔴 Very Hard |
| Bendale, Ontario | 165 mg/L | High | 🟠 Hard |
| Scarborough Village, Ontario | 221 mg/L | Very High | 🔴 Very Hard |
| Morningside, Ontario | 250 mg/L | Very High | 🔴 Very Hard |
| Eglinton East, Ontario | 252 mg/L | Very High | 🔴 Very Hard |
National Benchmark
How Woburn compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Woburn | 240.5 mg/L | 🔴 High |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Woburn's Water Unique?
Local geology and source profile
Woburn (a residential community in east Scarborough, Toronto) receives its drinking water from the City of Toronto, drawing from Lake Ontario primarily via the R.C. Harris Water Treatment Plant on the Kingston Road lakeshore. Water is treated using ozonation, biofiltration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) standards. Hardness in Woburn's distribution zone is 240.5 mg/L (14.0 gpg) — classified as very hard by Health Canada, with TDS of 616 mg/L reflecting the distribution characteristics of this east Scarborough supply corridor.
Toronto's east Scarborough distribution zone is served primarily from the R.C. Harris plant on the Lake Ontario shoreline, where the deep-water intake draws from the western Lake Ontario basin — a region where dissolved Silurian and Devonian carbonate minerals from the Great Lakes watershed are concentrated by the lake's internal processes. The Woburn distribution sub-zone's measured hardness of 240.5 mg/L, significantly elevated above the citywide average, reflects zone-specific supply and distribution characteristics in east Scarborough's extensive postwar residential grid.
At 240.5 mg/L, Woburn homeowners face persistent scale build-up on kettle elements, showerheads, and inside hot water tanks — weekly kettle descaling is common. Hot water tank elements accumulate scale rapidly; annual inspection and flushing are strongly recommended. A whole-home water softener is a practical investment at this very hard level, and the City of Toronto provides water quality reports and residential guidance at toronto.ca/water to help residents select appropriate treatment options.
Geology & Source: Supplied by City of Toronto from Lake Ontario via the R.C. Harris Water Treatment Plant — the Woburn (east Scarborough) distribution zone reflects very high carbonate mineral load in the Toronto east distribution network, producing very hard water at 240.5 mg/L (14.0 gpg).