Water hardness in Raesfeld
14.3 °dH very hard
Tap water in Raesfeld is very hard: 14.3 °dH (255 mg/L · 14.9 gpg · 25.5 °fH).
Source: Stadtwerke Borken, Wasserwerte Mittelwerte 2025 (Borken, Heiden und Raesfeld ohne Erle) (2025) · data checked 2026-11-03
Stadtwerke Borken publishes 2025 annual means for a shared supply table covering Borken, Heiden and Raesfeld, excluding the district of Erle. Total hardness there is 2.55 mmol/l, or 14.3 °dH (255.3 mg/L CaCO₃), in hardness range 3 (hard). The page carries no publication date, so 2025 is the reporting year, and Erle is not covered by this figure.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 14.3 °dH |
|---|---|
| Utility | Stadtwerke Borken |
How Raesfeld compares
- Tap water in Raesfeld is 24 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 283 of 809 in Germany (1 = hardest); 64 % of these cities have softer water.
- In Nordrhein-Westfalen it is number 35 of 153 cities; the regional median is 11.3 °dH.
- Nearest city with clearly softer water: Reken, 7 km away (3.8 °dH).
- Nearest city with clearly harder water: Rhede, 18 km away (19.1 °dH).
Ranking of the hardest and softest water in Germany →
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 Raesfeld
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 14 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| Hoover | S2 |
| 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 Raesfeld water hard or soft?
It is very hard: 255 mg/L as CaCO₃ (14.9 gpg, 14.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Raesfeld safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
How many grains per gallon is Raesfeld water?
14.9 gpg, equal to 14.3 °dH, 25.5 °fH or 255 mg/L calcium carbonate.
What dishwasher salt setting should I use in Raesfeld?
For 255 mg/L (14.3 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Raesfeld?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadtwerke Borken, Wasserwerte Mittelwerte 2025 (Borken, Heiden und Raesfeld ohne Erle) (2025). Method: figure published by the water supplier. Stadtwerke Borken, Wasserwerte Mittelwerte 2025 (Borken, Heiden und Raesfeld ohne Erle) · Outdated figure? Tell us