Water hardness in Porostov
0.58 mmol/L soft
Tap water in Porostov is soft: 0.58 mmol/L (58 mg/L · 3.4 gpg · 3.3 °dH).
Source: Východoslovenská vodárenská spoločnosť (VVS) (2025) · data checked 2026-10-20
Slovak suppliers report "Vápnik a horčík" in mmol/L; the recommended range is 1.1–5 mmol/L.
Water data
| Total hardness | 0.58 mmol/L |
|---|---|
| Utility | Východoslovenská vodárenská spoločnosť (VVS) |
How Porostov compares
- Tap water in Porostov is 69 % softer than the median of the 1113 cities we track in Slovakia (1.9 mmol/L).
- By hardness it ranks 1067 of 1113 in Slovakia (1 = hardest); 4 % of these cities have softer water.
- In Košice Region it is number 288 of 300 cities; the regional median is 1.28 mmol/L.
- Nearest city with clearly softer water: Choňkovce, 10 km away (0.46 mmol/L).
- Nearest city with clearly harder water: Sejkov, 4 km away (1.2 mmol/L).
Ranking of the hardest and softest water in Slovakia →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Porostov
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 3 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
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 Porostov water hard or soft?
It is soft: 58 mg/L as CaCO₃ (3.4 gpg, 3.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Porostov safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Slovak suppliers report "Vápnik a horčík" in mmol/L; the recommended range is 1.1–5 mmol/L.
How many grains per gallon is Porostov water?
3.4 gpg, equal to 3.3 °dH, 5.8 °fH or 58 mg/L calcium carbonate.
What dishwasher salt setting should I use in Porostov?
For 58 mg/L (3.3 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Porostov?
No. With soft water a softener adds nothing.
Source
Source: Východoslovenská vodárenská spoločnosť (VVS) (2025). Method: figure published by the water supplier. Východoslovenská vodárenská spoločnosť (VVS) · Outdated figure? Tell us