Keswick Water Hardness & Quality Report (2026)
Water Hardness
Source
lake
pH Level
7.7
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
339 mg/L
Est. Daily Cost
$0.42
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 Keswick, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Keswick | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.4 yrs | 8.5 yrs | -48% |
| Washing Machine | 7.8 yrs | 12 yrs | -35% |
| Water Heater | 9.3 yrs | 15 yrs | -38% |
Regional Water Comparison
How Keswick compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Keswick, Ontario | 156.5 mg/L | High | 🟠 Hard |
| East Gwillimbury, Ontario | 202 mg/L | Very High | 🔴 Very Hard |
| Innisfil, Ontario | 145 mg/L | High | 🟠 Hard |
| Newmarket, Ontario | 208 mg/L | Very High | 🔴 Very Hard |
| Aurora, Ontario | 178 mg/L | High | 🟠 Hard |
National Benchmark
How Keswick compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Keswick | 156.5 mg/L | 🟠 Moderate |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Keswick's Water Unique?
Local geology and source profile
Keswick's drinking water is managed by the Town of Georgina (part of York Region), drawing from Lake Simcoe via the Georgina water treatment plant on the south shore of Lake Simcoe near the mouth of the Holland River. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 156.5 mg/L (9.1 gpg) — classified as hard by Health Canada, reflecting the characteristic hardness of the south Lake Simcoe basin influenced by the Holland Marsh drainage and the Simcoe Lowlands geology.
Keswick's 156.5 mg/L Lake Simcoe supply is noticeably softer than the main York Region Lake Ontario supply (Richmond Hill 216 mg/L from batch 7, East Gwillimbury 202 mg/L from batch 16). Lake Simcoe's south basin near the Holland River mouth, where Keswick's intake is located, reflects dilution from the soft, agricultural Holland Marsh drainage from the organic peat soils and muck fields of the Holland River watershed — reducing the carbonate hardness compared to the harder north Lake Simcoe basin near Orillia or Barrie. The resulting 156.5 mg/L is characteristic of the south Simcoe intake zone at Keswick.
At 156.5 mg/L, Keswick residents experience regular scale deposits — monthly kettle descaling is typical. Hot water tanks operate reliably at this hardness level. The Town of Georgina (York Region) provides water quality information at georgina.ca. Keswick's lakeside community character, with significant recreational and retirement population on Lake Simcoe's south shore, benefits from the slightly softer supply compared to the main York Region Lake Ontario communities.
Geology & Source: Supplied by Town of Georgina from Lake Simcoe via the York Region water supply system — Lake Simcoe supply in the south Simcoe basin at the Holland Marsh corridor produces hard water at 156.5 mg/L (9.1 gpg).