Water hardness in Krosno
182 mg/L very hard
Tap water in Krosno is very hard: 182 mg/L (10.6 gpg · 10.2 °dH · 18.2 °fH).
Source: MPGK Krosno – Informacja o jakości wody III kw. 2026 (2026) · data checked 2026-10-29
Range across supply zones: 181–200 mg/L.
3 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| Ujęcie Iskrzynia | 200 | 200 | very hard |
| Ujęcie Sieniawa | 182 | 182 | very hard |
| Ujęcie Szczepańcowa | 181 | 181 | very hard |
MPGK Krosno reports 182 mg/L CaCO₃ in its third-quarter 2026 notice, with three zones between 181 and 200 mg/L. The zones are nearly identical, so the number holds across town. It still falls in the very hard band, and scale will form in kettles and boilers. The notice does not name the source of the water.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 182 mg/L |
|---|---|
| Utility | MPGK Krosno Sp. z o.o. |
How Krosno compares
- Tap water in Krosno is 26 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 76 of 91 in Poland (1 = hardest); 17 % of these cities have softer water.
- In podkarpackie it is number 5 of 8 cities; the regional median is 186 mg/L.
- Nearest city with clearly softer water: Stalowa Wola, 101 km away (130 mg/L).
- Nearest city with clearly harder water: Rzeszów, 42 km away (263 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 Krosno
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 10 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S2 |
| 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 Krosno water hard or soft?
It is very hard: 182 mg/L as CaCO₃ (10.6 gpg, 10.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Krosno 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 Krosno water?
10.6 gpg, equal to 10.2 °dH, 18.2 °fH or 182 mg/L calcium carbonate.
What dishwasher salt setting should I use in Krosno?
For 182 mg/L (10.2 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Krosno?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: MPGK Krosno – Informacja o jakości wody III kw. 2026 (2026). Method: figure published by the water supplier. MPGK Krosno – Informacja o jakości wody III kw. 2026 · Outdated figure? Tell us