Saint-Henri 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
200.3 mg/L
Est. Daily Cost
$0.26
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-Henri, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Saint-Henri | 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 Saint-Henri compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Saint-Henri, Quebec | 99 mg/L | Medium | 🟡 Moderately Hard |
| Le Sud-Ouest, Quebec | 74 mg/L | Medium | 🟡 Moderately Hard |
| Westmount, Quebec | 65 mg/L | Medium | 🟡 Moderately Hard |
| Notre-Dame-de-Grâce, Quebec | 126 mg/L | High | 🟠 Hard |
| Ville-Émard, Quebec | 99.5 mg/L | Medium | 🟡 Moderately Hard |
National Benchmark
How Saint-Henri compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Saint-Henri | 99 mg/L | 🟡 Low |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Saint-Henri's Water Unique?
Local geology and source profile
Saint-Henri's drinking water is managed by Ville de Montréal, drawing from the St. Lawrence River via the historic Atwater Water Treatment Plant — Saint-Henri is a historic working-class neighbourhood in southwest Montreal along the Lachine Canal, transformed from a 19th-century industrial district of textile mills and canal-side factories into a trendy, rapidly gentrifying neighbourhood with galleries, cafés, and creative offices in the former industrial heritage buildings along the Canal, one of Montreal's most dynamic and contested communities. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 99 mg/L (5.8 gpg) — classified as moderately hard by Health Canada, consistent with the Atwater plant distribution zone.
Saint-Henri is served by the Atwater Water Treatment Plant — Montreal's oldest and most iconic water facility (the 1930s-era Atwater filtration complex, one of Canada's architectural heritage buildings). The Atwater plant draws from the St. Lawrence River at the southwest Montreal shoreline, producing a moderately hard 97.5–100 mg/L supply from the Ordovician and Devonian carbonate dissolved minerals in the St. Lawrence water at the Montreal island intake. This is harder than the southwest DesBaillets plant zone (65–73 mg/L) but consistent with the Atwater plant zone hardness throughout southwest-central Montreal.
At 99 mg/L, Saint-Henri homes experience moderate scale deposits — cleaning every two months is advisable. Hot water tanks have a reliable operational lifespan. Water quality reports are published following Ministère de l'Environnement standards. The city's ongoing Lachine Canal gentrification brings many new residents to Saint-Henri's converted lofts and new condominiums alongside the historic working-class rowhouse streets. Health Canada lead precautionary guidance is strongly applicable in Saint-Henri's dense heritage housing stock dating to the 1880s–1930s.
Geology & Source: Supplied by Ville de Montréal from the St. Lawrence River via the Atwater Water Treatment Plant — the Saint-Henri southwest Montréal distribution zone receives the Atwater plant supply at 99 mg/L (5.8 gpg), consistent with the Atwater zone moderately hard character.