Water hardness in Latina
36.7 °fH very hard
Tap water in Latina is very hard: 36.7 °fH (367 mg/L · 21.4 gpg · 20.5 °dH).
Source: Acqualatina, qualità dell'acqua per comune (monitoraggio, valori medi) (2026-06) · data checked 2026-10-29
Range across supply zones: 345–388 mg/L.
Acqualatina's monitoring data for Latina (June 2026) give an average hardness of 366.6 mg/L CaCO₃ (36.7 °f), with a range of 344.9 to 388.3 mg/L. This is a computed value, not a single lab reading, and it falls in the very hard category. Expect heavy limescale on kettles and heating elements; we have not verified which sources feed the network.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Water data
| Total hardness | 36.7 °fH |
|---|
How Latina compares
- Tap water in Latina is 73 % harder than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 36 of 629 in Italy (1 = hardest); 94 % of these cities have softer water.
- In Lazio it is number 6 of 54 cities; the regional median is 27.2 °fH.
- Nearest city with clearly softer water: Cisterna di Latina, 15 km away (22 °fH).
- Nearest city with clearly harder water: Fiano Romano, 81 km away (62 °fH).
Ranking of the hardest and softest water in Italy →
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 Latina
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 21 °dH |
| AEG / Electrolux | 5 |
| Beko | 6th |
| Hoover | S3 |
| LG | H3 |
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 Latina water hard or soft?
It is very hard: 367 mg/L as CaCO₃ (21.4 gpg, 20.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Latina 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 Latina water?
21.4 gpg, equal to 20.5 °dH, 36.7 °fH or 367 mg/L calcium carbonate.
What dishwasher salt setting should I use in Latina?
For 367 mg/L (20.5 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Latina?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Acqualatina, qualità dell'acqua per comune (monitoraggio, valori medi) (2026-06). Method: computed from supplier's calcium and magnesium. Acqualatina, qualità dell'acqua per comune (monitoraggio, valori medi) · Outdated figure? Tell us