Water hardness in Zgierz
228 mg/L very hard
Tap water in Zgierz is very hard: 228 mg/L (13.3 gpg · 12.8 °dH · 22.8 °fH).
Source: Wodociągi i Kanalizacja Zgierz – Twardość wody pitnej wtłaczanej do sieci 2021 (2021) · data checked 2026-10-29
Range across supply zones: 204–270 mg/L.
This figure is over 3 years old; hardness may have changed.
The Zgierz utility (Wodociągi i Kanalizacja) published an average hardness of 227.9 mg/L CaCO₃ for water fed into the network, with values from 204 to 270 mg/L. The figure comes from the 2021 report, so it is older than most entries here, and current values may differ. The water falls in the very hard band, which means scale on kettles and heaters.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 228 mg/L |
|---|---|
| Utility | Wodociągi i Kanalizacja Zgierz |
How Zgierz compares
- Tap water in Zgierz is 7 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 56 of 91 in Poland (1 = hardest); 39 % of these cities have softer water.
- In łódzkie it is number 2 of 5 cities; the regional median is 208 mg/L.
- Nearest city with clearly softer water: Tomaszów Mazowiecki, 55 km away (166 mg/L).
- Nearest city with clearly harder water: Ciechanów, 141 km away (338 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 Zgierz
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 13 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| 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 Zgierz water hard or soft?
It is very hard: 228 mg/L as CaCO₃ (13.3 gpg, 12.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Zgierz 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 Zgierz water?
13.3 gpg, equal to 12.8 °dH, 22.8 °fH or 228 mg/L calcium carbonate.
What dishwasher salt setting should I use in Zgierz?
For 228 mg/L (12.8 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Zgierz?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Wodociągi i Kanalizacja Zgierz – Twardość wody pitnej wtłaczanej do sieci 2021 (2021). Method: figure published by the water supplier. Wodociągi i Kanalizacja Zgierz – Twardość wody pitnej wtłaczanej do sieci 2021 · Outdated figure? Tell us