Water hardness in Laatzen
7.6 °dH hard
Tap water in Laatzen is hard: 7.6 °dH (136 mg/L · 7.9 gpg · 13.6 °fH).
Source: enercity – Bekanntmachung Trinkwasseraufbereitung/Zusatzstoffe (Wasserhärte) (2023) · data checked 2026-10-23
Range across supply zones: 66–205 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| enercity-Netz (Mittel, Wasserwerke Elze-Berkhof, Fuhrberg, Grasdorf) | 11.5 | 205 | very hard |
| Harzwasserwerke-Direktversorgung (Ingeln, Oesselse, Gleidingen, kleine Teile Rethen) | 3.7 | 66 | moderately hard |
An enercity public notice from 2023 describes two supply networks in Laatzen. The main enercity network, fed by the waterworks Elze-Berkhof, Fuhrberg and Grasdorf, is at 205.3 mg/L CaCO₃. Areas served directly by Harzwasserwerke (Ingeln, Oesselse, Gleidingen and small parts of Rethen) are at 66.0 mg/L. The city figure is 135.7 mg/L, so your district decides the actual value.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 7.6 °dH |
|---|---|
| mmol_l | 0.487 |
| Utility | enercity AG |
How Laatzen compares
- Tap water in Laatzen is 34 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 595 of 809 in Germany (1 = hardest); 26 % of these cities have softer water.
- In Niedersachsen it is number 31 of 94 cities; the regional median is 7 °dH.
- Nearest city with clearly softer water: Hildesheim, 21 km away (1.8 °dH).
- Nearest city with clearly harder water: Hannover, 8 km away (12 °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 Laatzen
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 8 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| 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 Laatzen water hard or soft?
It is hard: 136 mg/L as CaCO₃ (7.9 gpg, 7.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Laatzen 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 Laatzen water?
7.9 gpg, equal to 7.6 °dH, 13.6 °fH or 136 mg/L calcium carbonate.
What dishwasher salt setting should I use in Laatzen?
For 136 mg/L (7.6 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Laatzen?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: enercity – Bekanntmachung Trinkwasseraufbereitung/Zusatzstoffe (Wasserhärte) (2023). Method: figure published by the water supplier. enercity – Bekanntmachung Trinkwasseraufbereitung/Zusatzstoffe (Wasserhärte) · Outdated figure? Tell us