Water hardness in Piekary Śląskie
198 mg/L very hard
Tap water in Piekary Śląskie is very hard: 198 mg/L (11.6 gpg · 11.1 °dH · 19.8 °fH).
Source: MPWiK Piekary Śląskie – Twardość wody (2026) · data checked 2026-10-29
Range across supply zones: 96–300 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| SUW Bibiela (Piekary-Centrum, Brzeziny, Kozłowa Góra, Szarlej) | 300 | 300 | very hard |
| Zbiornik Murcki (Dąbrówka Wielka) | 96 | 96 | moderately hard |
MPWiK Piekary Śląskie, which receives its water from GPW Katowice, reports a median of 198 mg/L CaCO₃. Two zones are listed, from 96 to 300 mg/L, so one part of town can have far softer water than another. Ask the utility which zone your address is in before buying treatment equipment. The range is wide, and the median alone can mislead.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 198 mg/L |
|---|---|
| Utility | MPWiK Piekary Śląskie (water from GPW Katowice) |
How Piekary Śląskie compares
- Tap water in Piekary Śląskie is 19 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 68 of 91 in Poland (1 = hardest); 26 % of these cities have softer water.
- In śląskie it is number 5 of 15 cities; the regional median is 168 mg/L.
- Nearest city with clearly softer water: Siemianowice Śląskie, 9 km away (113 mg/L).
- Nearest city with clearly harder water: Tarnowskie Góry, 9 km away (279 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 Piekary Śląskie
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 11 °dH |
| AEG / Electrolux | 3 |
| 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 Piekary Śląskie water hard or soft?
It is very hard: 198 mg/L as CaCO₃ (11.6 gpg, 11.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Piekary Śląskie 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 Piekary Śląskie water?
11.6 gpg, equal to 11.1 °dH, 19.8 °fH or 198 mg/L calcium carbonate.
What dishwasher salt setting should I use in Piekary Śląskie?
For 198 mg/L (11.1 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Piekary Śląskie?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: MPWiK Piekary Śląskie – Twardość wody (2026). Method: figure published by the water supplier. MPWiK Piekary Śląskie – Twardość wody · Outdated figure? Tell us