Water hardness in Stamboliyski
2.37 mmol/L very hard
Tap water in Stamboliyski is very hard: 2.37 mmol/L (237 mg/L · 13.9 gpg · 13.3 °dH).
Source: ViK Plovdiv, Обща твърдост по населени места (2026) · data checked 2026-10-29
Range across supply zones: 220–254 mg/L.
Stamboliyski takes its water from ViK Plovdiv's network. The computed hardness is 237.2 mg/L as CaCO3, within a range of 220.2 to 254.2 mg/L, which is very hard. Figures come from the utility's list of total hardness by settlement. Hard water of this level leaves scale in boilers and washing machines over time.
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 | 2.37 mmol/L |
|---|---|
| Utility | ViK Plovdiv |
How Stamboliyski compares
- Tap water in Stamboliyski is 88 % harder than the median of the 26 cities we track in Bulgaria (1.26 mmol/L).
- By hardness it ranks 6 of 26 in Bulgaria (1 = hardest); 80 % of these cities have softer water.
- In Plovdiv it is number 5 of 15 cities; the regional median is 1.78 mmol/L.
- Nearest city with clearly softer water: Perushtitsa, 9 km away (1.37 mmol/L).
- Nearest city with clearly harder water: Parvomay, 56 km away (3.11 mmol/L).
Ranking of the hardest and softest water in Bulgaria →
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 Stamboliyski
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 13 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| 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 Stamboliyski water hard or soft?
It is very hard: 237 mg/L as CaCO₃ (13.9 gpg, 13.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Stamboliyski 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 Stamboliyski water?
13.9 gpg, equal to 13.3 °dH, 23.7 °fH or 237 mg/L calcium carbonate.
What dishwasher salt setting should I use in Stamboliyski?
For 237 mg/L (13.3 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Stamboliyski?
Yes, unless you are only passing through: scale damages appliances within a few years.
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