Water hardness in Siemianowice Śląskie
113 mg/L moderately hard
Tap water in Siemianowice Śląskie is moderately hard: 113 mg/L (6.6 gpg · 6.3 °dH · 11.3 °fH).
Source: PPIS Katowice, obszarowa ocena jakości wody za rok 2025 (2026-03-17) (2025) · data checked 2026-10-29
The regional sanitary inspectorate in Katowice assessed water quality for 2025 and gives 113 mg/L CaCO₃ for Siemianowice Śląskie, which is moderate. This is far softer than most Polish cities in our data. The supply is run by Wodociągi Siemianowickie Aqua-Sprint with GPW, so the figure may not apply to every connection. Scale will build up slowly, and a softener is rarely needed.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 113 mg/L |
|---|---|
| Utility | Wodociągi Siemianowickie Aqua-Sprint / GPW |
How Siemianowice Śląskie compares
- Tap water in Siemianowice Śląskie is 54 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 85 of 91 in Poland (1 = hardest); 7 % of these cities have softer water.
- In śląskie it is number 9 of 15 cities; the regional median is 168 mg/L.
- Nearest city with clearly softer water: Czechowice-Dziedzice, 46 km away (85 mg/L).
- Nearest city with clearly harder water: Będzin, 7 km away (230 mg/L).
Ranking of the hardest and softest water in Poland →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Siemianowice Śląskie
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Siemianowice Śląskie water hard or soft?
It is moderately hard: 113 mg/L as CaCO₃ (6.6 gpg, 6.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Siemianowice 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 Siemianowice Śląskie water?
6.6 gpg, equal to 6.3 °dH, 11.3 °fH or 113 mg/L calcium carbonate.
What dishwasher salt setting should I use in Siemianowice Śląskie?
For 113 mg/L (6.3 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Siemianowice Śląskie?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: PPIS Katowice, obszarowa ocena jakości wody za rok 2025 (2026-03-17) (2025). Method: figure published by the water supplier. PPIS Katowice, obszarowa ocena jakości wody za rok 2025 (2026-03-17) · Outdated figure? Tell us