Water hardness in Tychy
175 mg/L hard
Tap water in Tychy is hard: 175 mg/L (10.2 gpg · 9.8 °dH · 17.5 °fH).
Source: RPWiK Tychy S.A. - Twardość wody (date not specified) · data checked 2026-11-12
Range across supply zones: 75–190 mg/L.
3 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| GPW Katowice surface intake (most of Tychy) | 103 | 103 | moderately hard |
| SUW Bielska (L, K, H, U, Cztery Pory Roku, FIT estates) | 175 | 175 | hard |
| SUW Leśna (Wilkowyje, Mąkołowiec, Stare Tychy) | 180 | 180 | very hard |
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 175 mg/L |
|---|---|
| Utility | RPWiK Tychy S.A. (Rejonowe Przedsiębiorstwo Wodociągów i Kanalizacji) |
How Tychy compares
- Tap water in Tychy is 29 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 77 of 91 in Poland (1 = hardest); 16 % of these cities have softer water.
- In śląskie it is number 7 of 15 cities; the regional median is 168 mg/L.
- Nearest city with clearly softer water: Katowice, 14 km away (110 mg/L).
- Nearest city with clearly harder water: Oświęcim, 21 km away (221 mg/L).
Ranking of the hardest and softest water in Poland →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Tychy
| 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 Tychy water hard or soft?
It is hard: 175 mg/L as CaCO₃ (10.2 gpg, 9.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Tychy 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 Tychy water?
10.2 gpg, equal to 9.8 °dH, 17.5 °fH or 175 mg/L calcium carbonate.
What dishwasher salt setting should I use in Tychy?
For 175 mg/L (9.8 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Tychy?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: RPWiK Tychy S.A. - Twardość wody (date not specified). Method: computed from supplier's calcium and magnesium. RPWiK Tychy S.A. - Twardość wody · Outdated figure? Tell us