Saint-Jean-sur-Richelieu 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
147.8 mg/L
Est. Daily Cost
$0.22
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 Saint-Jean-sur-Richelieu, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In Saint-Jean-sur-Richelieu | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.9 yrs | 8.5 yrs | -19% |
| Washing Machine | 10.5 yrs | 12 yrs | -13% |
| Water Heater | 12.3 yrs | 15 yrs | -18% |
Regional Water Comparison
How Saint-Jean-sur-Richelieu compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Saint-Jean-sur-Richelieu, Quebec | 83 mg/L | Medium | 🟡 Moderately Hard |
| Chambly, Quebec | 90 mg/L | Medium | 🟡 Moderately Hard |
| Saint-Basile-le-Grand, Quebec | 117.5 mg/L | High | 🟡 Moderately Hard |
| Saint-Bruno-de-Montarville, Quebec | 119 mg/L | High | 🟡 Moderately Hard |
| Saint-Hubert, Quebec | 75.5 mg/L | Medium | 🟡 Moderately Hard |
National Benchmark
How Saint-Jean-sur-Richelieu compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Saint-Jean-sur-Richelieu | 83 mg/L | 🟡 Low |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Saint-Jean-sur-Richelieu's Water Unique?
Local geology and source profile
Saint-Jean-sur-Richelieu's drinking water is managed by Ville de Saint-Jean-sur-Richelieu, drawing from the Rivière Richelieu via the Saint-Jean-sur-Richelieu Water Treatment Plant on the west bank of the river. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, fully meeting the Guidelines for Canadian Drinking Water Quality (GCDWQ). Hardness measures 83 mg/L (4.8 gpg) — classified as moderately hard by Health Canada, reflecting the mixed geological character of the Richelieu River watershed.
The Rivière Richelieu connects Lake Champlain to the St. Lawrence River, flowing northward through the Montérégie lowland. The Richelieu drains the Champlain Valley — a rift basin lined with Cambrian and Ordovician limestone and dolostone — as well as runoff from the Adirondack and Vermont Green Mountain metamorphic highlands to the south and east. The limestone contribution from the Champlain Valley lowlands adds moderate dissolved calcium to the river, while the metamorphic highland runoff is softer. The resulting blend produces the 83 mg/L supply characteristic of Saint-Jean-sur-Richelieu.
At 83 mg/L, residents experience only modest scale deposits in kettles and on tap aerators — descaling every two to three months is generally adequate. Hot water tanks perform reliably at this hardness without dedicated scale treatment. Ville de Saint-Jean-sur-Richelieu produces annual water quality reports following provincial Ministère de l'Environnement regulations, and provides guidance consistent with Health Canada lead precautions for residents in older homes with pre-1970 plumbing or original lead service connections in this historic Montérégie community.
Geology & Source: Supplied by Ville de Saint-Jean-sur-Richelieu from the Rivière Richelieu — water draining through the Champlain Lowlands and mixed Adirondack metamorphic and Cambrian–Ordovician limestone Champlain Valley terrain reaches this Montérégie city at 83 mg/L (4.8 gpg).