Water hardness in Tarnowskie Góry
279 mg/L very hard
Tap water in Tarnowskie Góry is very hard: 279 mg/L (16.3 gpg · 15.6 °dH · 27.9 °fH).
Source: PWiK Tarnowskie Góry – Informacja o jakości wody III kw. 2026 (2026) · data checked 2026-10-29
Range across supply zones: 198–432 mg/L.
6 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| SUW Koehler (Centrum, Osada Jana, Lasowice) | 432 | 432 | very hard |
| SUW Miedary / GPW Katowice (Stare Tarnowice, Os. Chemik, Gruzełki, Kolejarzy, Pniowiec, Sowice) | 233 | 233 | very hard |
| SUW Prefabet (Rybna, Strzybnica) | 198 | 198 | very hard |
| Ujęcie CHM S2+S3 (Os. Chemik, Gruzełki, Strzybnica, Pniowiec, Sowice) | 326 | 326 | very hard |
| Ujęcie nr III ul. Opolska (Centrum, Osada Jana, Lasowice) | 231 | 231 | very hard |
| Ujęcie Opatowice (Os. Przyjaźń) | 367 | 367 | very hard |
PWiK Tarnowskie Góry reports a median of 279.2 mg/L CaCO₃ for the third quarter of 2026, across six supply zones. Values run from 198 to 432 mg/L, so hardness depends on which zone a street belongs to. Check the zone on your utility's quarterly notice before sizing a softener. The report does not name the water source, and we make no claim about it.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 279 mg/L |
|---|---|
| Utility | PWiK Sp. z o.o. Tarnowskie Góry (Veolia) |
How Tarnowskie Góry compares
- Tap water in Tarnowskie Góry is 14 % harder than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 23 of 91 in Poland (1 = hardest); 76 % of these cities have softer water.
- In śląskie it is number 3 of 15 cities; the regional median is 168 mg/L.
- Nearest city with clearly softer water: Piekary Śląskie, 9 km away (198 mg/L).
- Nearest city with clearly harder water: Zabrze, 14 km away (369 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 Tarnowskie Góry
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °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 Tarnowskie Góry water hard or soft?
It is very hard: 279 mg/L as CaCO₃ (16.3 gpg, 15.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Tarnowskie Góry 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 Tarnowskie Góry water?
16.3 gpg, equal to 15.6 °dH, 27.9 °fH or 279 mg/L calcium carbonate.
What dishwasher salt setting should I use in Tarnowskie Góry?
For 279 mg/L (15.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Tarnowskie Góry?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: PWiK Tarnowskie Góry – Informacja o jakości wody III kw. 2026 (2026). Method: figure published by the water supplier. PWiK Tarnowskie Góry – Informacja o jakości wody III kw. 2026 · Outdated figure? Tell us