Laval-des-Rapides Water Hardness & Quality Report (2026)
Water Hardness
Source
river
pH Level
7.4
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
128.4 mg/L
Est. Daily Cost
$0.20
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 Laval-des-Rapides, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Laval-des-Rapides | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.2 yrs | 8.5 yrs | -15% |
| Washing Machine | 10.9 yrs | 12 yrs | -9% |
| Water Heater | 12.6 yrs | 15 yrs | -16% |
Regional Water Comparison
How Laval-des-Rapides compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Laval-des-Rapides, Quebec | 74 mg/L | Medium | 🟡 Moderately Hard |
| Laval, Quebec | 118 mg/L | Medium | 🟡 Moderately Hard |
| Pont-Viau, Quebec | 93 mg/L | Medium | 🟡 Moderately Hard |
| Cartierville, Quebec | 108 mg/L | Medium | 🟡 Moderately Hard |
| Ahuntsic-Cartierville, Quebec | 69.5 mg/L | Medium | 🟡 Moderately Hard |
National Benchmark
How Laval-des-Rapides compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Laval-des-Rapides | 74 mg/L | 🟡 Low |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Laval-des-Rapides's Water Unique?
Local geology and source profile
Laval-des-Rapides (a dense residential and commercial borough sector of Ville de Laval in the southwest, adjacent to the Autoroute 15 and the Rivière des Mille Îles–Rivière des Prairies junction) receives its drinking water from Ville de Laval, drawing from the Rivière des Prairies via the Laval Water Treatment Plant. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness in this distribution zone is 74 mg/L (4.3 gpg) — classified as moderately hard by Health Canada, characteristic of the south-central Laval distribution network.
Laval-des-Rapides receives Laval's standard Rivière des Prairies supply — a blended source drawing from the Ottawa River corridor through the Lac des Deux Montagnes pool, mixing soft Laurentian Shield tributary inflows (from the Rivière des Mille Îles and Rivière du Nord drainage) with moderately hard Ordovician limestone Lowlands river water. The 74 mg/L is consistent with the moderate range of Laval's distribution system, intermediate between the softer Duvernay (65.5 mg/L) and the harder Val-des-Arbres (101 mg/L) sub-zones.
At 74 mg/L, Laval-des-Rapides residents experience moderate scale deposits in kettles and on tap aerators — descaling every two to three months is adequate. Hot water tanks operate reliably at this hardness without dedicated treatment. Ville de Laval publishes annual water quality reports following Ministère de l'Environnement standards and provides Health Canada-compliant lead guidance for residents in the borough's established and heritage residential properties close to the riverside corridor.
Geology & Source: Supplied by Ville de Laval from the Rivière des Prairies via the Laval water system — river water at the western Laval distribution zone reflects moderate Ordovician limestone Lowlands and Ottawa River chemistry at 74 mg/L (4.3 gpg).