Water hardness in Jülich
12.3 °dH very hard
Tap water in Jülich is very hard: 12.3 °dH (220 mg/L · 12.8 gpg · 22 °fH).
Source: Stadtwerke Jülich, Trinkwasseranalyse 11/2024 (Wasserwerk Teis) (2024-11) · data checked 2026-10-23
Stadtwerke Jülich publishes lab reports per waterworks, and the figure here, 219.6 mg/L CaCO₃, comes from the Teis waterworks sample of November 2024. Other waterworks are not covered. A newer report from 2026 exists, but its table layout could not be read reliably, so it is not used. Treat the number as one sample, not an annual mean.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 12.3 °dH |
|---|---|
| Utility | Stadtwerke Jülich |
How Jülich compares
- Tap water in Jülich is 7 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 373 of 809 in Germany (1 = hardest); 54 % of these cities have softer water.
- In Nordrhein-Westfalen it is number 62 of 153 cities; the regional median is 11.3 °dH.
- Nearest city with clearly softer water: Düren, 16 km away (6.4 °dH).
- Nearest city with clearly harder water: Pulheim, 31 km away (18.1 °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 Jülich
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 12 °dH |
| AEG / Electrolux | 3 |
| Beko | 3rd |
| Hoover | S2 |
| 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 Jülich water hard or soft?
It is very hard: 220 mg/L as CaCO₃ (12.8 gpg, 12.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Jülich 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 Jülich water?
12.8 gpg, equal to 12.3 °dH, 22 °fH or 220 mg/L calcium carbonate.
What dishwasher salt setting should I use in Jülich?
For 220 mg/L (12.3 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Jülich?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadtwerke Jülich, Trinkwasseranalyse 11/2024 (Wasserwerk Teis) (2024-11). Method: figure published by the water supplier. Stadtwerke Jülich, Trinkwasseranalyse 11/2024 (Wasserwerk Teis) · Outdated figure? Tell us