Ahuntsic-Cartierville Water Hardness & Quality Report (2026)
Water Hardness
Source
river
pH Level
7.3
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
116.9 mg/L
Est. Daily Cost
$0.19
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 Ahuntsic-Cartierville, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Ahuntsic-Cartierville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.3 yrs | 8.5 yrs | -14% |
| Washing Machine | 11 yrs | 12 yrs | -8% |
| Water Heater | 12.8 yrs | 15 yrs | -15% |
Regional Water Comparison
How Ahuntsic-Cartierville compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Ahuntsic-Cartierville, Quebec | 69.5 mg/L | Medium | 🟡 Moderately Hard |
| Duvernay, Quebec | 65.5 mg/L | Medium | 🟡 Moderately Hard |
| Pont-Viau, Quebec | 93 mg/L | Medium | 🟡 Moderately Hard |
| Laval, Quebec | 118 mg/L | Medium | 🟡 Moderately Hard |
| Val-des-Arbres, Quebec | 101 mg/L | Medium | 🟡 Moderately Hard |
National Benchmark
How Ahuntsic-Cartierville compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Ahuntsic-Cartierville | 69.5 mg/L | 🟡 Low |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Ahuntsic-Cartierville's Water Unique?
Local geology and source profile
Ahuntsic-Cartierville receives its drinking water through Ville de Montréal — Direction de l'eau potable, part of Montréal's integrated municipal network drawing from the St. Lawrence River and the Rivière des Prairies via the Atwater, DesBaillets, and Charles-J. Des Baillets water treatment plants. Treatment includes ozonation, biofiltration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness in this north Montréal borough's distribution zone is 69.5 mg/L (4.1 gpg) — classified as moderately hard by Health Canada, one of Montréal's softer distribution zones.
Ahuntsic-Cartierville borders the Rivière des Prairies — the waterway that separates Montréal island from Laval island — and is supplied predominantly from the Rivière des Prairies intake at the Charles-J. Des Baillets plant. The Rivière des Prairies draws from upstream Laurentian catchments where Precambrian Shield tributaries contribute very soft, low-mineral water from granite and gneiss uplands. This abundant Shield inflow strongly dilutes the harder Ordovician limestone-influenced St. Lawrence baseline, producing the notably soft 69.5 mg/L characteristic of this northern borough.
At 69.5 mg/L, Ahuntsic-Cartierville residents experience only light scale deposits in kettles and on tap aerators — occasional descaling two to three times a year is typically adequate. Hot water tanks operate with minimal scale accumulation at this hardness. However, in this densely built borough with many pre-war apartment buildings and older homes, Montréal's Direction de l'eau potable advises residents to follow Health Canada lead precautionary guidelines and participate in the city's lead service line replacement programme, as older building plumbing can elevate lead levels at the tap.
Geology & Source: Supplied by Ville de Montréal — Direction de l'eau potable from the Rivière des Prairies intake — Precambrian Shield tributary softening of St. Lawrence basin water reaches this north Montréal borough at 69.5 mg/L (4.1 gpg).