Water hardness in Harbour Grace
87 mg/L moderately hard
Tap water in Harbour Grace is moderately hard: 87 mg/L (5.1 gpg · 4.9 °dH · 8.7 °fH).
Source: Government of Newfoundland and Labrador, Tap Water Quality for Public Water Supplies (Winter, Spring, Summer, Fall 2025) (2025-12-19) · data checked 2026-10-20
Range across supply zones: 7–110 mg/L.
Health Canada: hardness above 200 mg/L is considered poor but tolerable; above 500 mg/L unacceptable.
Water data
| Total hardness | 87 mg/L |
|---|---|
| Utility | Harbour Grace public water supply |
How Harbour Grace compares
- Tap water in Harbour Grace is 14 % softer than the median of the 254 cities we track in Canada (101 mg/L).
- By hardness it ranks 142 of 254 in Canada (1 = hardest); 44 % of these cities have softer water.
- In Newfoundland and Labrador it is number 9 of 55 cities; the regional median is 23 mg/L.
- Nearest city with clearly softer water: Carbonear, 6 km away (9 mg/L).
- Nearest city with clearly harder water: Wabana, 22 km away (120 mg/L).
Ranking of the hardest and softest water in Canada →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Harbour Grace
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 5 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Harbour Grace water hard or soft?
It is moderately hard: 87 mg/L as CaCO₃ (5.1 gpg, 4.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Harbour Grace 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 Harbour Grace water?
5.1 gpg, equal to 4.9 °dH, 8.7 °fH or 87 mg/L calcium carbonate.
What dishwasher salt setting should I use in Harbour Grace?
For 87 mg/L (4.9 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Harbour Grace?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Government of Newfoundland and Labrador, Tap Water Quality for Public Water Supplies (Winter, Spring, Summer, Fall 2025) (2025-12-19). Method: figure published by the water supplier. Government of Newfoundland and Labrador, Tap Water Quality for Public Water Supplies (Winter, Spring, Summer, Fall 2025) · Outdated figure? Tell us