Water hardness in Nettuno
9 °fH moderately hard
Tap water in Nettuno is moderately hard: 9 °fH (90 mg/L · 5.3 gpg · 5 °dH).
Source: Acqualatina, qualità dell'acqua per comune (valori medi II semestre 2020) (2020) · data checked 2026-10-29
This figure is over 3 years old; hardness may have changed.
Acqualatina delivers the water in Nettuno; the utility uses springs and wells in the limestone ranges around the Pontine plain, though the page we used does not name the intake for Nettuno. We hold a value of 90.0 mg/L CaCO₃, which counts as moderately hard water (a 2020 figure that may have changed since). 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 | 9 °fH |
|---|---|
| calcio_mg_l | 24.5 |
| magnesio_mg_l | 7.2 |
| Utility | Acqualatina |
How Nettuno compares
- Tap water in Nettuno is 58 % softer than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 544 of 629 in Italy (1 = hardest); 13 % of these cities have softer water.
- In Lazio it is number 51 of 54 cities; the regional median is 27.2 °fH.
- Nearest city with clearly softer water: Genzano di Roma, 28 km away (2.7 °fH).
- Nearest city with clearly harder water: Anzio, 4 km away (16 °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 Nettuno
| 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 Nettuno water hard or soft?
It is moderately hard: 90 mg/L as CaCO₃ (5.3 gpg, 5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Nettuno 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 Nettuno water?
5.3 gpg, equal to 5 °dH, 9 °fH or 90 mg/L calcium carbonate.
What dishwasher salt setting should I use in Nettuno?
For 90 mg/L (5 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Nettuno?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Acqualatina, qualità dell'acqua per comune (valori medi II semestre 2020) (2020). Method: older figure, source currently unavailable. Acqualatina, qualità dell'acqua per comune (valori medi II semestre 2020) · Outdated figure? Tell us