Water hardness in Karlovo
0.57 mmol/L soft
Tap water in Karlovo is soft: 0.57 mmol/L (57 mg/L · 3.3 gpg · 3.2 °dH).
Source: ViK Plovdiv, Обща твърдост по населени места (2026) · data checked 2026-10-29
Range across supply zones: 40–74 mg/L.
Karlovo is supplied by ViK Plovdiv and has much softer water than most of the utility's area: a computed 57.0 mg/L as CaCO3, with a range of 40.0 to 74.1 mg/L. That falls in the soft category. The range is wide relative to the median, so the figure at your tap may differ with the supply point. Scale build-up should be slow, and a softener is probably unnecessary.
Bulgarian health inspectorates report hardness in mgeq/L (1 mgeq/L = 0.5 mmol/L); the limit is 12 mgeq/L.
Water data
| Total hardness | 0.57 mmol/L |
|---|---|
| Utility | ViK Plovdiv |
How Karlovo compares
- Tap water in Karlovo is 55 % softer than the median of the 26 cities we track in Bulgaria (1.26 mmol/L).
- By hardness it ranks 20 of 26 in Bulgaria (1 = hardest); 24 % of these cities have softer water.
- In Plovdiv it is number 13 of 15 cities; the regional median is 1.78 mmol/L.
- Nearest city with clearly softer water: Kalofer, 15 km away (0.38 mmol/L).
- Nearest city with clearly harder water: Kaloyanovo, 32 km away (1.78 mmol/L).
Ranking of the hardest and softest water in Bulgaria →
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 Karlovo
| 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 Karlovo water hard or soft?
It is soft: 57 mg/L as CaCO₃ (3.3 gpg, 3.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Karlovo safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Bulgarian health inspectorates report hardness in mgeq/L (1 mgeq/L = 0.5 mmol/L); the limit is 12 mgeq/L.
How many grains per gallon is Karlovo water?
3.3 gpg, equal to 3.2 °dH, 5.7 °fH or 57 mg/L calcium carbonate.
What dishwasher salt setting should I use in Karlovo?
For 57 mg/L (3.2 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Karlovo?
No. With soft water a softener adds nothing.
Source
Source: ViK Plovdiv, Обща твърдост по населени места (2026). Method: computed from supplier's calcium and magnesium. ViK Plovdiv, Обща твърдост по населени места · Outdated figure? Tell us