Water hardness in Warsaw, Białołęka
260 mg/L very hard
Tap water in Warsaw, Białołęka is very hard: 260 mg/L (15.2 gpg · 14.6 °dH · 26 °fH).
Source: MPWiK Warszawa: Twardość wody, I półrocze 2026 (2026) · data checked 2026-10-23
Warsaw draws on the Vistula through infiltration wells such as Gruba Kaśka, feeding the Praga and Filtry plants, and on Lake Zegrze via a separate northern plant. The reported hardness is 260.0 mg/L CaCO₃. Appliances scale up quickly at this level, and a softener is worth considering.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 260 mg/L |
|---|---|
| Utility | MPWiK m.st. Warszawy S.A. |
How Warsaw, Białołęka compares
- Tap water in Warsaw, Białołęka is 6 % harder than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 36 of 91 in Poland (1 = hardest); 59 % of these cities have softer water.
- In mazowieckie it is number 3 of 17 cities; the regional median is 251 mg/L.
- Nearest city with clearly softer water: Wawer, 20 km away (196 mg/L).
- Nearest city with clearly harder water: Ciechanów, 67 km away (338 mg/L).
Ranking of the hardest and softest water in Poland →
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 Warsaw, Białołęka
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 15 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| Hoover | S2 |
| 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 Warsaw, Białołęka water hard or soft?
It is very hard: 260 mg/L as CaCO₃ (15.2 gpg, 14.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Warsaw, Białołęka safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
How many grains per gallon is Warsaw, Białołęka water?
15.2 gpg, equal to 14.6 °dH, 26 °fH or 260 mg/L calcium carbonate.
What dishwasher salt setting should I use in Warsaw, Białołęka?
For 260 mg/L (14.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Warsaw, Białołęka?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: MPWiK Warszawa: Twardość wody, I półrocze 2026 (2026). Method: figure published by the water supplier. MPWiK Warszawa: Twardość wody, I półrocze 2026 · Outdated figure? Tell us