Water hardness in Gdynia
194 mg/L very hard
Tap water in Gdynia is very hard: 194 mg/L (11.3 gpg · 10.9 °dH · 19.4 °fH).
Source: PEWiK Gdynia - Twardość ogólna (średnia) 2026 r., table image (2026) · data checked 2026-10-21
Range across supply zones: 173–279 mg/L.
6 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| Babie Doły, Oksywie, Obłuże, Pogórze | 216 | 216 | very hard |
| Chwarzno, Wiczlino, Dąbrowa, Witomino, Działki Leśne | 186 | 186 | very hard |
| Cisowa, Chylonia, Pustki Cisowskie, Demptowo, Leszczynki, Grabówek, Śródmieście | 279 | 279 | very hard |
| Kamienna Góra, Mały Kack, Redłowo, Wz. Św. Maksymiliana | 186 | 186 | very hard |
| Orłowo | 202 | 202 | very hard |
| Wielki Kack, Karwiny | 173 | 173 | hard |
PEWiK Gdynia publishes a 2026 average for each group of districts, in a table that is an image rather than text. The six groups range from 173 mg/L CaCO₃ in Wielki Kack and Karwiny to 279 mg/L in Cisowa, Chylonia and Śródmieście, with a median of 194 mg/L. The digits were read from the image by eye, so treat them as reported, not machine-checked. Hardness differs noticeably between district groups, so check yours.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 194 mg/L |
|---|---|
| Utility | Przedsiębiorstwo Wodociągów i Kanalizacji Sp. z o.o. w Gdyni (PEWiK Gdynia) |
How Gdynia compares
- Tap water in Gdynia is 21 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 72 of 91 in Poland (1 = hardest); 21 % of these cities have softer water.
- In pomorskie it is number 6 of 7 cities; the regional median is 220 mg/L.
- Nearest city with clearly harder water: Rumia, 11 km away (283 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 Gdynia
| 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 Gdynia water hard or soft?
It is very hard: 194 mg/L as CaCO₃ (11.3 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 Gdynia 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 Gdynia water?
11.3 gpg, equal to 10.9 °dH, 19.4 °fH or 194 mg/L calcium carbonate.
What dishwasher salt setting should I use in Gdynia?
For 194 mg/L (10.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Gdynia?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: PEWiK Gdynia - Twardość ogólna (średnia) 2026 r., table image (2026). Method: figure published by the water supplier. PEWiK Gdynia - Twardość ogólna (średnia) 2026 r., table image · Outdated figure? Tell us