Water hardness in Heinsberg
8.4 °dH hard
Tap water in Heinsberg is hard: 8.4 °dH (150 mg/L · 8.8 gpg · 15 °fH).
Source: Stadtwerke Heinsberg GmbH Wasserqualität (2026-05) · data checked 2026-10-23
Stadtwerke Heinsberg states a hardness of 149.9 mg/L CaCO₃ (8.4 °dH) for the whole municipal area, as of 8 May 2026. That sits at the lower edge of the medium band the utility prints (1.5 to 2.5 mmol/L), so a small change in analysis could shift the label. The page does not describe the water source. Scale builds slowly at this level, but descaling heating elements is still worthwhile.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 8.4 °dH |
|---|---|
| Utility | Stadtwerke Heinsberg GmbH |
How Heinsberg compares
- Tap water in Heinsberg is 27 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 556 of 809 in Germany (1 = hardest); 31 % of these cities have softer water.
- In Nordrhein-Westfalen it is number 106 of 153 cities; the regional median is 11.3 °dH.
- Nearest city with clearly softer water: Düren, 39 km away (6.4 °dH).
- Nearest city with clearly harder water: Wassenberg, 5 km away (12.8 °dH).
Ranking of the hardest and softest water in Germany →
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 Heinsberg
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 8 °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 Heinsberg water hard or soft?
It is hard: 150 mg/L as CaCO₃ (8.8 gpg, 8.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Heinsberg 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 Heinsberg water?
8.8 gpg, equal to 8.4 °dH, 15 °fH or 150 mg/L calcium carbonate.
What dishwasher salt setting should I use in Heinsberg?
For 150 mg/L (8.4 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Heinsberg?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Stadtwerke Heinsberg GmbH Wasserqualität (2026-05). Method: figure published by the water supplier. Stadtwerke Heinsberg GmbH Wasserqualität · Outdated figure? Tell us