Water hardness in East Gwillimbury
168 mg/L hard
Tap water in East Gwillimbury is hard: 168 mg/L (9.8 gpg · 9.4 °dH · 16.8 °fH).
Source: York Region, Drinking Water Quality and Monitoring - 2026 Q2 average hardness (2026) · data checked 2026-11-02
Range across supply zones: 160–317 mg/L.
3 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| Holland Landing | 168 | 168 | hard |
| Mount Albert | 317 | 317 | very hard |
| Queensville | 160 | 160 | hard |
York Region's 2026 Q2 table has no row for East Gwillimbury proper but lists three communities: Mount Albert at 317 mg/L, Holland Landing at 168 and Queensville at 160 mg/L as CaCO3. The figure shown is the median of those zones. Mount Albert is much harder, so the right figure for you depends on your community.
Health Canada: hardness above 200 mg/L is considered poor but tolerable; above 500 mg/L unacceptable.
Water data
| Total hardness | 168 mg/L |
|---|---|
| Utility | Regional Municipality of York |
How East Gwillimbury compares
- Tap water in East Gwillimbury is 66 % harder than the median of the 254 cities we track in Canada (101 mg/L).
- By hardness it ranks 58 of 254 in Canada (1 = hardest); 77 % of these cities have softer water.
- In Ontario it is number 37 of 120 cities; the regional median is 124 mg/L.
- Nearest city with clearly softer water: Aurora, 11 km away (130 mg/L).
- Nearest city with clearly harder water: Mount Albert, 10 km away (317 mg/L).
Ranking of the hardest and softest water in Canada →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in East Gwillimbury
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 9 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S1 |
| LG | H2 |
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 East Gwillimbury water hard or soft?
It is hard: 168 mg/L as CaCO₃ (9.8 gpg, 9.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in East Gwillimbury 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 East Gwillimbury water?
9.8 gpg, equal to 9.4 °dH, 16.8 °fH or 168 mg/L calcium carbonate.
What dishwasher salt setting should I use in East Gwillimbury?
For 168 mg/L (9.4 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in East Gwillimbury?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: York Region, Drinking Water Quality and Monitoring - 2026 Q2 average hardness (2026). Method: figure published by the water supplier. York Region, Drinking Water Quality and Monitoring - 2026 Q2 average hardness · Outdated figure? Tell us