Water hardness in Seelze
7.3 °dH hard
Tap water in Seelze is hard: 7.3 °dH (130 mg/L · 7.6 gpg · 12.9 °fH).
Source: enercity AG, Bekanntmachung Zusatzstoffe (Hannover, 21. Oktober 2025) (2025-10) · data checked 2026-10-23
Range across supply zones: 49–210 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| enercity network, citywide part of Seelze (except Harzwasser parts) | 11.8 | 210 | very hard |
| Harzwasser parts: Almhorst, Döteberg, Gümmer, Harenberg, Kirchwehren, Lathwehren, Lohnde, Almhorster Straße, part of Vor den Specken | 2.7 | 49 | soft |
Seelze is supplied by enercity, and the notice of 21 October 2025 gives two supplies. Most of the town gets the network mean of 210.2 mg/L CaCO₃, while parts such as Almhorst, Gümmer and Lohnde receive Harzwasser at 48.7 mg/L. The headline 129.5 mg/L is the median of these two zones and describes no actual tap. Check which supply serves your district.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 7.3 °dH |
|---|---|
| Utility | enercity AG (Stadtwerke Hannover group) |
How Seelze compares
- Tap water in Seelze is 37 % softer than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 619 of 809 in Germany (1 = hardest); 24 % of these cities have softer water.
- In Niedersachsen it is number 42 of 94 cities; the regional median is 7 °dH.
- Nearest city with clearly softer water: Hildesheim, 39 km away (1.8 °dH).
- Nearest city with clearly harder water: Garbsen, 4 km away (14.5 °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 Seelze
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °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 Seelze water hard or soft?
It is hard: 130 mg/L as CaCO₃ (7.6 gpg, 7.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Seelze 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 Seelze water?
7.6 gpg, equal to 7.3 °dH, 12.9 °fH or 130 mg/L calcium carbonate.
What dishwasher salt setting should I use in Seelze?
For 130 mg/L (7.3 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Seelze?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: enercity AG, Bekanntmachung Zusatzstoffe (Hannover, 21. Oktober 2025) (2025-10). Method: figure published by the water supplier. enercity AG, Bekanntmachung Zusatzstoffe (Hannover, 21. Oktober 2025) · Outdated figure? Tell us