Water hardness in Lviv
2.76 mmol/L very hard
Tap water in Lviv is very hard: 2.76 mmol/L (277 mg/L · 16.2 gpg · 15.5 °dH).
Source: Lvivvodokanal - Якість питної води у водопровідних мережах міста Львова (data as of 01.08.2026) (2026-08) · data checked 2026-10-23
Range across supply zones: 175–438 mg/L.
5 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mmol/L | mg/L | ||
|---|---|---|---|
| Frankivskyi district (southern well group) | 1.9 | 190 | very hard |
| Lychakivskyi district (eastern well group) | 4.25 | 425 | very hard |
| Shevchenkivskyi district (northern well group) | 3.02 | 303 | very hard |
| Sykhivskyi district (southern and eastern well groups) | 2.74 | 274 | very hard |
| Zaliznychnyi district (western well group) | 2.76 | 277 | very hard |
Lvivvodokanal publishes hardness separately for each city district, and the districts are fed from different well groups. Only Frankivskyi district (southern well group) is shown here: 3.50 to 4.10 mmol/L in the 1 August 2026 table. Readings for the other districts are still under review and are not published, so this range should not be read as the figure for the whole city. If you live outside Frankivskyi, check the utility's latest quality table or test your own tap.
DSanPiN 2.2.4-171-10 limit: 7 mmol/L (≈ 350 mg/L).
Water data
| Total hardness | 2.76 mmol/L |
|---|---|
| Utility | Lvivvodokanal (LMKP Lvivvodokanal) |
How Lviv compares
- Tap water in Lviv is 22 % harder than the median of the 8 cities we track in Ukraine (2.26 mmol/L).
- By hardness it ranks 2 of 8 in Ukraine (1 = hardest); 86 % of these cities have softer water.
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 Lviv
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 15 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| Hoover | S2 |
| LG | H3 |
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 Lviv water hard or soft?
It is very hard: 277 mg/L as CaCO₃ (16.2 gpg, 15.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Lviv safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. DSanPiN 2.2.4-171-10 limit: 7 mmol/L (≈ 350 mg/L).
How many grains per gallon is Lviv water?
16.2 gpg, equal to 15.5 °dH, 27.6 °fH or 277 mg/L calcium carbonate.
What dishwasher salt setting should I use in Lviv?
For 277 mg/L (15.5 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Lviv?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Lvivvodokanal - Якість питної води у водопровідних мережах міста Львова (data as of 01.08.2026) (2026-08). Method: computed from supplier's calcium and magnesium. Lvivvodokanal - Якість питної води у водопровідних мережах міста Львова (data as of 01.08.2026) · Outdated figure? Tell us