Water hardness in Lariano
10.6 °fH moderately hard
Tap water in Lariano is moderately hard: 10.6 °fH (106 mg/L · 6.2 gpg · 5.9 °dH).
Source: Acea Ato 2, qualità dell'acqua per zona (valori mediani) (2026-07) · data checked 2026-10-20
Range across supply zones: 91–173 mg/L.
Acea Ato 2 supplies Lariano from a blend of aqueduct water and local wells typical of the Alban Hills and Prenestine area; we have not verified which share reaches Lariano, so the description is for the area. Calculated from the utility's readings, hardness is 105.8 mg/L CaCO₃, with readings from 91.3 to 172.9 mg/L, which counts as moderately hard water. Most households need nothing beyond occasional descaling of the kettle and shower head.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Water data
| Total hardness | 10.6 °fH |
|---|
How Lariano compares
- Tap water in Lariano is 50 % softer than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 517 of 629 in Italy (1 = hardest); 18 % of these cities have softer water.
- In Lazio it is number 50 of 54 cities; the regional median is 27.2 °fH.
- Nearest city with clearly softer water: Genzano di Roma, 12 km away (2.7 °fH).
- Nearest city with clearly harder water: Valmontone, 10 km away (17.2 °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 Lariano
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °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 Lariano water hard or soft?
It is moderately hard: 106 mg/L as CaCO₃ (6.2 gpg, 5.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Lariano 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 Lariano water?
6.2 gpg, equal to 5.9 °dH, 10.6 °fH or 106 mg/L calcium carbonate.
What dishwasher salt setting should I use in Lariano?
For 106 mg/L (5.9 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Lariano?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Acea Ato 2, qualità dell'acqua per zona (valori mediani) (2026-07). Method: computed from supplier's calcium and magnesium. Acea Ato 2, qualità dell'acqua per zona (valori mediani) · Outdated figure? Tell us