Water hardness in Genzano di Roma
2.7 °fH soft
Tap water in Genzano di Roma is soft: 2.7 °fH (27 mg/L · 1.6 gpg · 1.5 °dH).
Source: Acea Ato 2, qualità dell'acqua per zona (valori mediani) (2026-07) · data checked 2026-10-20
Range across supply zones: 7–185 mg/L.
In Genzano di Roma the supply is a mix of aqueduct water, from the Simbrivio and Doganella systems, and many local wells that Acea Ato 2 operates in the Alban Hills and Prenestine mountains; the volcanic ground of the Alban Hills shapes the groundwater chemistry. The figure we show, 26.6 mg/L CaCO₃, is calculated from the utility's published analyses, with readings from 7.2 to 185.2 mg/L, which counts as soft water. Values differ across the area, so check your own address before buying a softener; little limescale forms at this level, so descalers are rarely needed.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Water data
| Total hardness | 2.7 °fH |
|---|
How Genzano di Roma compares
- Tap water in Genzano di Roma is 87 % softer than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 618 of 629 in Italy (1 = hardest); 2 % of these cities have softer water.
- In Lazio it is number 54 of 54 cities; the regional median is 27.2 °fH.
- Nearest city with clearly harder water: Ariccia, 2 km away (16.9 °fH).
Ranking of the hardest and softest water in Italy →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Genzano di Roma
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
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 Genzano di Roma water hard or soft?
It is soft: 27 mg/L as CaCO₃ (1.6 gpg, 1.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Genzano di Roma 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 Genzano di Roma water?
1.6 gpg, equal to 1.5 °dH, 2.7 °fH or 27 mg/L calcium carbonate.
What dishwasher salt setting should I use in Genzano di Roma?
For 27 mg/L (1.5 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Genzano di Roma?
No. With soft water a softener adds nothing.
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