Water hardness in Pomezia
28.1 °fH very hard
Tap water in Pomezia is very hard: 28.1 °fH (281 mg/L · 16.4 gpg · 15.7 °dH).
Source: Acea Ato 2, qualità dell'acqua per zona (valori mediani) (2026-07) · data checked 2026-10-20
Range across supply zones: 245–318 mg/L.
The water in Pomezia comes through the Acea Ato 2 network, which draws mostly on Apennine spring water and some local sources; we have not matched Pomezia to a specific intake, so this is a description of the regional supply. Calculated from the utility's readings, hardness is 281.0 mg/L CaCO₃, with readings from 244.6 to 317.5 mg/L, which counts as very hard water. Kettles, steam irons and dishwashers collect scale fast at this level, and a softener is a common answer.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Water data
| Total hardness | 28.1 °fH |
|---|
How Pomezia compares
- Tap water in Pomezia is 32 % harder than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 138 of 629 in Italy (1 = hardest); 78 % of these cities have softer water.
- In Lazio it is number 24 of 54 cities; the regional median is 27.2 °fH.
- Nearest city with clearly softer water: Aprilia, 15 km away (8.5 °fH).
- Nearest city with clearly harder water: Latina, 40 km away (36.7 °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 Pomezia
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| Hoover | S2 |
| 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 Pomezia water hard or soft?
It is very hard: 281 mg/L as CaCO₃ (16.4 gpg, 15.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Pomezia 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 Pomezia water?
16.4 gpg, equal to 15.7 °dH, 28.1 °fH or 281 mg/L calcium carbonate.
What dishwasher salt setting should I use in Pomezia?
For 281 mg/L (15.7 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Pomezia?
Yes, unless you are only passing through: scale damages appliances within a few years.
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