Water hardness in Flörsheim am Main
19 °dH very hard
Tap water in Flörsheim am Main is very hard: 19 °dH (339 mg/L · 19.8 gpg · 33.9 °fH).
Source: Stadt Flörsheim am Main – Informationen zum Flörsheimer Trinkwasser (Institut Fresenius 02.04.2025) (2025-04) · data checked 2026-11-02
Stadt Flörsheim publishes an analysis by Institut Fresenius dated 2 April 2025, giving 339.2 mg/L CaCO₃. The utility is Stadtwerke Flörsheim, which buys from Hessenwasser. Rüsselsheim next door reports 399.8 mg/L and Mainz 344.5 mg/L. The report lists no zones, so treat the figure as indicative for the town as a whole.
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Water data
| Total hardness | 19 °dH |
|---|---|
| Calcium (mg/L) | 36 |
| Magnesium (mg/L) | 5.77 |
| Utility | Stadtwerke Flörsheim (Hessenwasser) |
How Flörsheim am Main compares
- Tap water in Flörsheim am Main is 65 % harder than the median of the 809 cities we track in Germany (11.5 °dH).
- By hardness it ranks 104 of 809 in Germany (1 = hardest); 87 % of these cities have softer water.
- In Hessen it is number 9 of 73 cities; the regional median is 10.7 °dH.
- Nearest city with clearly softer water: Mörfelden-Walldorf, 11 km away (12.9 °dH).
- Nearest city with clearly harder water: Nußloch, 81 km away (31.6 °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 Flörsheim am Main
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 19 °dH |
| AEG / Electrolux | 5 |
| Beko | 5th |
| Hoover | S3 |
| 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 Flörsheim am Main water hard or soft?
It is very hard: 339 mg/L as CaCO₃ (19.8 gpg, 19 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Flörsheim am Main 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 Flörsheim am Main water?
19.8 gpg, equal to 19 °dH, 33.9 °fH or 339 mg/L calcium carbonate.
What dishwasher salt setting should I use in Flörsheim am Main?
For 339 mg/L (19 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Flörsheim am Main?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Stadt Flörsheim am Main – Informationen zum Flörsheimer Trinkwasser (Institut Fresenius 02.04.2025) (2025-04). Method: figure published by the water supplier. Stadt Flörsheim am Main – Informationen zum Flörsheimer Trinkwasser (Institut Fresenius 02.04.2025) · Outdated figure? Tell us