Water hardness in Pierrefonds
53 mg/L soft
Tap water in Pierrefonds is soft: 53 mg/L (3.1 gpg · 3 °dH · 5.3 °fH).
Source: Ville de Montréal, Sommaire annuel 2022 - usine Pierrefonds (2022) · data checked 2026-11-02
This figure is over 3 years old; hardness may have changed.
The City of Montréal's 2022 summary for the Pierrefonds plant prints no hardness value. We computed 53.3 mg/L as CaCO3 from the reported averages of 16.99 mg/L calcium and 2.63 mg/L magnesium. A 2021 report from a neighbouring municipality names a different supplier, so supply to some streets may differ. The result suggests soft water, and scale is a minor issue.
Health Canada: hardness above 200 mg/L is considered poor but tolerable; above 500 mg/L unacceptable.
Water data
| Total hardness | 53 mg/L |
|---|---|
| Calcium (mg/L) | 16.99 |
| Magnesium (mg/L) | 2.63 |
| Utility | Ville de Montréal (usine Pierrefonds) |
How Pierrefonds compares
- Tap water in Pierrefonds is 47 % softer than the median of the 254 cities we track in Canada (101 mg/L).
- By hardness it ranks 166 of 254 in Canada (1 = hardest); 35 % of these cities have softer water.
- In Québec it is number 12 of 14 cities; the regional median is 86 mg/L.
- Nearest city with clearly softer water: Gatineau, 141 km away (40 mg/L).
- Nearest city with clearly harder water: Cartierville, 17 km away (123 mg/L).
Ranking of the hardest and softest water in Canada →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Pierrefonds
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 3 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Pierrefonds water hard or soft?
It is soft: 53 mg/L as CaCO₃ (3.1 gpg, 3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Pierrefonds safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Health Canada: hardness above 200 mg/L is considered poor but tolerable; above 500 mg/L unacceptable.
How many grains per gallon is Pierrefonds water?
3.1 gpg, equal to 3 °dH, 5.3 °fH or 53 mg/L calcium carbonate.
What dishwasher salt setting should I use in Pierrefonds?
For 53 mg/L (3 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Pierrefonds?
No. With soft water a softener adds nothing.
Source
Source: Ville de Montréal, Sommaire annuel 2022 - usine Pierrefonds (2022). Method: computed from supplier's calcium and magnesium. Ville de Montréal, Sommaire annuel 2022 - usine Pierrefonds · Outdated figure? Tell us