Water hardness in Nowy Dwór Mazowiecki
195 mg/L very hard
Tap water in Nowy Dwór Mazowiecki is very hard: 195 mg/L (11.4 gpg · 10.9 °dH · 19.5 °fH).
Source: ZWiK Nowy Dwór Mazowiecki - lab report M/0/02/2026/62/FM/1 (GBA Polska accredited lab) (2026-02) · data checked 2026-11-12
Range across supply zones: 150–240 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| Network tap, Publiczne Przedszkole nr 1, ul. Mazowiecka 12 (SUW Warszawska report) | 240 | 240 | very hard |
| SUW Leśna (plant outlet) | 150 | 150 | hard |
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 195 mg/L |
|---|---|
| Utility | Zakład Wodociągów i Kanalizacji Sp. z o.o. w Nowym Dworze Mazowieckim |
How Nowy Dwór Mazowiecki compares
- Tap water in Nowy Dwór Mazowiecki is 20 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 70 of 91 in Poland (1 = hardest); 22 % of these cities have softer water.
- In mazowieckie it is number 17 of 17 cities; the regional median is 251 mg/L.
- Nearest city with clearly harder water: Warsaw, Białołęka, 21 km away (260 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 Nowy Dwór Mazowiecki
| 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 Nowy Dwór Mazowiecki water hard or soft?
It is very hard: 195 mg/L as CaCO₃ (11.4 gpg, 10.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Nowy Dwór Mazowiecki 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 Nowy Dwór Mazowiecki water?
11.4 gpg, equal to 10.9 °dH, 19.5 °fH or 195 mg/L calcium carbonate.
What dishwasher salt setting should I use in Nowy Dwór Mazowiecki?
For 195 mg/L (10.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Nowy Dwór Mazowiecki?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: ZWiK Nowy Dwór Mazowiecki - lab report M/0/02/2026/62/FM/1 (GBA Polska accredited lab) (2026-02). Method: own measurement. ZWiK Nowy Dwór Mazowiecki - lab report M/0/02/2026/62/FM/1 (GBA Polska accredited lab) · Outdated figure? Tell us