Water hardness in Ooij
8.7 °dH hard
Tap water in Ooij is hard: 8.7 °dH (155 mg/L · 9.1 gpg · 15.5 °fH).
Source: Vitens, waterhardheid per postcode (2026-10) (2026-10) · data checked 2026-10-20
Dutch suppliers report °dH; most networks are softened centrally to 5.6–8.4 °dH.
Water data
| Total hardness | 8.7 °dH |
|---|
How Ooij compares
- Tap water in Ooij is 16 % harder than the median of the 654 cities we track in the Netherlands (7.5 °dH).
- By hardness it ranks 82 of 654 in the Netherlands (1 = hardest); 87 % of these cities have softer water.
- In Gelderland it is number 13 of 184 cities; the regional median is 6.7 °dH.
- Nearest city with clearly softer water: Groesbeek, 9 km away (6.1 °dH).
- Nearest city with clearly harder water: Tiel, 35 km away (11 °dH).
Ranking of the hardest and softest water in the Netherlands →
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 Ooij
| 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 Ooij water hard or soft?
It is hard: 155 mg/L as CaCO₃ (9.1 gpg, 8.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Ooij safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Dutch suppliers report °dH; most networks are softened centrally to 5.6–8.4 °dH.
How many grains per gallon is Ooij water?
9.1 gpg, equal to 8.7 °dH, 15.5 °fH or 155 mg/L calcium carbonate.
What dishwasher salt setting should I use in Ooij?
For 155 mg/L (8.7 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Ooij?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Vitens, waterhardheid per postcode (2026-10) (2026-10). Method: figure published by the water supplier. Vitens, waterhardheid per postcode (2026-10) · Outdated figure? Tell us