Water hardness in Jarosław
204 mg/L very hard
Tap water in Jarosław is very hard: 204 mg/L (11.9 gpg · 11.4 °dH · 20.4 °fH).
Source: PWiK Jarosław – Twardość wody (2026) · data checked 2026-10-29
Range across supply zones: 202–205 mg/L.
PWiK Jarosław reports a narrow range of 202 to 205 mg/L CaCO₃, with a computed value of 203.5 mg/L. That sits just inside the very hard band, so the town is near the threshold. Because the network is uniform, one figure fits most addresses.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 204 mg/L |
|---|---|
| Utility | PWiK Jarosław Sp. z o.o. |
How Jarosław compares
- Tap water in Jarosław is 17 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 67 of 91 in Poland (1 = hardest); 27 % of these cities have softer water.
- In podkarpackie it is number 3 of 8 cities; the regional median is 186 mg/L.
- Nearest city with clearly softer water: Stalowa Wola, 77 km away (130 mg/L).
- Nearest city with clearly harder water: Rzeszów, 49 km away (263 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 Jarosław
| 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 Jarosław water hard or soft?
It is very hard: 204 mg/L as CaCO₃ (11.9 gpg, 11.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Jarosław 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 Jarosław water?
11.9 gpg, equal to 11.4 °dH, 20.4 °fH or 204 mg/L calcium carbonate.
What dishwasher salt setting should I use in Jarosław?
For 204 mg/L (11.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Jarosław?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: PWiK Jarosław – Twardość wody (2026). Method: computed from supplier's calcium and magnesium. PWiK Jarosław – Twardość wody · Outdated figure? Tell us