Rock Forest Water Hardness & Quality Report (2026)
Water Hardness
Source
river
pH Level
7.6
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
200.2 mg/L
Est. Daily Cost
$0.27
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 Rock Forest, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Rock Forest | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.3 yrs | 8.5 yrs | -26% |
| Washing Machine | 9.9 yrs | 12 yrs | -17% |
| Water Heater | 11.6 yrs | 15 yrs | -23% |
Regional Water Comparison
How Rock Forest compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Rock Forest, Quebec | 100 mg/L | Medium | 🟡 Moderately Hard |
| Sherbrooke, Quebec | 55 mg/L | Low | 🟢 Soft |
| Magog, Quebec | 97 mg/L | Medium | 🟡 Moderately Hard |
| Victoriaville, Quebec | 55 mg/L | Low | 🟢 Soft |
| Drummondville, Quebec | 82 mg/L | Medium | 🟡 Moderately Hard |
National Benchmark
How Rock Forest compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rock Forest | 100 mg/L | 🟡 Low |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Rock Forest's Water Unique?
Local geology and source profile
Rock Forest (a residential sub-district in the west end of Ville de Sherbrooke, formerly an independent municipality) receives its drinking water from Ville de Sherbrooke, drawing from the Rivière Magog or associated Eastern Townships river system via the Sherbrooke water treatment infrastructure serving the Rock Forest distribution area. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness in Rock Forest's sub-zone is 100 mg/L (5.8 gpg) — classified as moderately hard by Health Canada, notably harder than central Sherbrooke's 55 mg/L from batch 3, reflecting different supply source characteristics in the Rock Forest distribution corridor.
Rock Forest lies on the west side of Sherbrooke, near the Rivière Magog as it flows from Lac Memphrémagog through the Appalachian Highlands of the Eastern Townships (Estrie). The Magog corridor drains a watershed with a higher proportion of Ordovician and Cambrian limestone and marble Appalachian bedrock compared to the more metamorphic Shield-adjacent Sherbrooke central area. This elevated carbonate rock influence along the Rock Forest supply corridor contributes the additional dissolved calcium that elevates the sub-zone hardness to 100 mg/L above the 55 mg/L recorded in central Sherbrooke.
At 100 mg/L, Rock Forest residents experience moderate scale deposits in kettles and on tap aerators — descaling every six to eight weeks is adequate. Hot water tanks operate reliably at this hardness without dedicated treatment. Ville de Sherbrooke publishes annual water quality reports for the combined Sherbrooke territory following Ministère de l'Environnement standards, with sub-zone hardness information available to residents seeking to understand variations within the municipal supply network.
Geology & Source: Supplied by Ville de Sherbrooke from the Rivière Magog — water from this Eastern Townships river draining the Appalachian Highlands with carbonate and metamorphic rock influence in the Rock Forest sub-zone produces moderately hard water at 100 mg/L (5.8 gpg).