Water hardness in Selargius
8.7 °fH moderately hard
Tap water in Selargius is moderately hard: 8.7 °fH (87 mg/L · 5.1 gpg · 4.9 °dH).
Source: Abbanoa, qualità dell'acqua, semestri 2-2025…1-2026 (2026-05) · data checked 2026-10-20
Range across supply zones: 83–114 mg/L.
Selargius is supplied by Abbanoa, the island-wide utility, largely from surface reservoirs that are treated in purification plants. The figure we show, 87.0 mg/L CaCO₃, is calculated from the utility's published analyses, with readings from 82.9 to 114.0 mg/L, which counts as moderately hard water. This is a middle value, enough for some limescale on taps but not a heavy burden on appliances.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Water data
| Total hardness | 8.7 °fH |
|---|
How Selargius compares
- Tap water in Selargius is 59 % softer than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 552 of 629 in Italy (1 = hardest); 12 % of these cities have softer water.
- In Sardegna it is number 12 of 17 cities; the regional median is 9.9 °fH.
- Nearest city with clearly softer water: Nuoro, 119 km away (3.2 °fH).
- Nearest city with clearly harder water: Quartu Sant'Elena, 8 km away (11 °fH).
Ranking of the hardest and softest water in Italy →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Selargius
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 5 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Selargius water hard or soft?
It is moderately hard: 87 mg/L as CaCO₃ (5.1 gpg, 4.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Selargius safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
How many grains per gallon is Selargius water?
5.1 gpg, equal to 4.9 °dH, 8.7 °fH or 87 mg/L calcium carbonate.
What dishwasher salt setting should I use in Selargius?
For 87 mg/L (4.9 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Selargius?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Abbanoa, qualità dell'acqua, semestri 2-2025…1-2026 (2026-05). Method: computed from supplier's calcium and magnesium. Abbanoa, qualità dell'acqua, semestri 2-2025…1-2026 · Outdated figure? Tell us