Tap water hardness in Québec
We have published hardness data for 14 cities in Québec. The median is 86 mg/L; the hardest water is in Cartierville (123 mg/L), the softest in Aylmer (32 mg/L).
43 % of these cities have hard or very hard water (over 120 mg/L).
Health Canada: hardness above 200 mg/L is considered poor but tolerable; above 500 mg/L unacceptable.
Cities in Québec, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Cartierville | 123 | 123 | hard |
| Le Sud-Ouest | 123 | 123 | hard |
| Mont-Royal | 123 | 123 | hard |
| Montreal | 123 | 123 | hard |
| Montréal-Nord | 123 | 123 | hard |
| Saint-Michel | 123 | 123 | hard |
| Saguenay | 100 | 100 | moderately hard |
| Carignan | 71 | 71 | moderately hard |
| Beaconsfield | 59 | 59 | soft |
| Kirkland | 59 | 59 | soft |
| Pointe-Claire | 59 | 59 | soft |
| Pierrefonds | 53 | 53 | soft |
| Gatineau | 40 | 40 | soft |
| Aylmer | 32 | 32 | soft |