Water hardness in Wejherowo
174 mg/L hard
Tap water in Wejherowo is hard: 174 mg/L (10.2 gpg · 9.7 °dH · 17.4 °fH).
Source: PEWiK Gdynia – Twardość ogólna (średnia) 2026 r. (2026) · data checked 2026-10-29
Wejherowo is supplied by PEWiK Gdynia, which publishes an average total hardness of 174 mg/L CaCO₃ for 2026. That is hard water but the softest in this batch of towns. Neighbouring Rumia, supplied by the same utility, has a clearly higher figure, so hardness changes within the PEWiK area. Scale is moderate, and appliances still need occasional descaling.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 174 mg/L |
|---|---|
| Utility | PEWiK Gdynia Sp. z o.o. |
How Wejherowo compares
- Tap water in Wejherowo is 29 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 78 of 91 in Poland (1 = hardest); 14 % of these cities have softer water.
- In pomorskie it is number 7 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
- 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 Wejherowo
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 10 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S1 |
| 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 Wejherowo water hard or soft?
It is hard: 174 mg/L as CaCO₃ (10.2 gpg, 9.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Wejherowo 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 Wejherowo water?
10.2 gpg, equal to 9.7 °dH, 17.4 °fH or 174 mg/L calcium carbonate.
What dishwasher salt setting should I use in Wejherowo?
For 174 mg/L (9.7 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Wejherowo?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: PEWiK Gdynia – Twardość ogólna (średnia) 2026 r. (2026). Method: figure published by the water supplier. PEWiK Gdynia – Twardość ogólna (średnia) 2026 r. · Outdated figure? Tell us