Water hardness in Zielona Góra
267 mg/L very hard
Tap water in Zielona Góra is very hard: 267 mg/L (15.6 gpg · 14.9 °dH · 26.6 °fH).
Source: ZWiK Zielona Góra, Tabele jakości wody (2026) · data checked 2026-10-29
Range across supply zones: 230–299 mg/L.
4 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| Hydrofornia Stary Kisielin-Zatorze | 230 | 230 | very hard |
| SUW Zacisze | 265 | 265 | very hard |
| SUW Zawada | 268 | 268 | very hard |
| Ujęcie Zjednoczenia | 299 | 299 | very hard |
ZWiK Zielona Góra publishes quality tables for four zones. The median is 266.5 mg/L CaCO₃, and zones range from 230 to 299 mg/L, all in the very hard band. Poland's drinking water rules set a recommended hardness window for treated water but no hard upper cap, so these values are routine. Scale in boilers and washing machines is the everyday result.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 267 mg/L |
|---|---|
| Utility | Zielonogórskie Wodociągi i Kanalizacja Sp. z o.o. |
How Zielona Góra compares
- Tap water in Zielona Góra is 9 % harder than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 29 of 91 in Poland (1 = hardest); 69 % of these cities have softer water.
- Nearest city with clearly softer water: Wrocław, 140 km away (207 mg/L).
- Nearest city with clearly harder water: Leszno, 74 km away (337 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 Zielona Góra
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 15 °dH |
| AEG / Electrolux | 4 |
| 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 Zielona Góra water hard or soft?
It is very hard: 267 mg/L as CaCO₃ (15.6 gpg, 14.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Zielona Góra 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 Zielona Góra water?
15.6 gpg, equal to 14.9 °dH, 26.6 °fH or 267 mg/L calcium carbonate.
What dishwasher salt setting should I use in Zielona Góra?
For 267 mg/L (14.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Zielona Góra?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: ZWiK Zielona Góra, Tabele jakości wody (2026). Method: figure published by the water supplier. ZWiK Zielona Góra, Tabele jakości wody · Outdated figure? Tell us