Water hardness in Midland
305 mg/L very hard
Tap water in Midland is very hard: 305 mg/L (17.8 gpg · 17.1 °dH · 30.4 °fH).
Source: Ontario Ministry of the Environment, Conservation and Parks, Drinking Water Surveillance Program, Open Government Licence – Ontario (2016) · data checked 2026-10-21
Range across supply zones: 232–377 mg/L.
This figure is over 3 years old; hardness may have changed.
Midland has its own drinking water system. The programme reported 304.5 mg/L as CaCO3 for 2016, but individual results ranged from 232 to 377, so the figure is a midpoint of a wide spread. We have not verified the source water in detail. This is very hard water.
Health Canada: hardness above 200 mg/L is considered poor but tolerable; above 500 mg/L unacceptable.
Water data
| Total hardness | 305 mg/L |
|---|---|
| Utility | Midland Drinking Water System |
How Midland compares
- Tap water in Midland is 201 % harder than the median of the 254 cities we track in Canada (101 mg/L).
- By hardness it ranks 22 of 254 in Canada (1 = hardest); 92 % of these cities have softer water.
- In Ontario it is number 21 of 120 cities; the regional median is 124 mg/L.
- Nearest city with clearly softer water: Collingwood, 40 km away (86 mg/L).
- Nearest city with clearly harder water: Hanover, 113 km away (404 mg/L).
Ranking of the hardest and softest water in Canada →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Midland
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 17 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S3 |
| LG | H3 |
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 Midland water hard or soft?
It is very hard: 305 mg/L as CaCO₃ (17.8 gpg, 17.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Midland 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 Midland water?
17.8 gpg, equal to 17.1 °dH, 30.4 °fH or 305 mg/L calcium carbonate.
What dishwasher salt setting should I use in Midland?
For 305 mg/L (17.1 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Midland?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Ontario Ministry of the Environment, Conservation and Parks, Drinking Water Surveillance Program, Open Government Licence – Ontario (2016). Method: figure published by the water supplier. Ontario Ministry of the Environment, Conservation and Parks, Drinking Water Surveillance Program, Open Government Licence – Ontario · Outdated figure? Tell us