Water hardness by postcode in Italy
Enter your postcode: we match it to the nearest city with published hardness data and show its value, unit and source.
How the search works
Every postcode is matched to the nearest of the 629 cities in Italy for which a water supplier or regulator publishes hardness. Supply areas do not follow postcode boundaries, so the result is the figure of the nearest published supply. If the match is more than 15 km away we say so, and the annual water quality report of your own supplier is the better reference. Each city page names the source document and its date and, where the supplier publishes them, the values of each supply zone.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Regions
- Abruzzo7 · 23 °fH
- Basilicata7 · 18.2 °fH
- Campania33 · 40 °fH
- Friuli-Venezia Giulia7 · 19.8 °fH
- Lazio54 · 27.2 °fH
- Liguria7 · 22 °fH
- Lombardia142 · 24.9 °fH
- Marche50 · 27 °fH
- Piemonte242 · 12.3 °fH
- Sardegna17 · 9.9 °fH
- Sicilia10 · 20.5 °fH
- Toscana9 · 23 °fH
- Trentino-Alto Adige5 · 16.4 °fH
- Veneto37 · 26.9 °fH
Largest cities in Italy
| °fH | mg/L | ||
|---|---|---|---|
| Rome | 34.2 | 342 | very hard |
| Milan | 28 | 280 | very hard |
| Turin | 20.1 | 201 | very hard |
| Palermo | 27.8 | 278 | very hard |
| Genoa | 15 | 150 | hard |
| Cagliari | 10.8 | 108 | moderately hard |
| Mestre | 24.6 | 246 | very hard |
| Acilia-Castel Fusano-Ostia Antica | 33 | 330 | very hard |
| Sassari | 10.8 | 108 | moderately hard |
| Guidonia Montecelio | 33.3 | 333 | very hard |
| Torre del Greco | 42 | 420 | very hard |
| Lido di Ostia | 33 | 330 | very hard |
| Sesto San Giovanni | 31.5 | 315 | very hard |
| Fiumicino | 33 | 330 | very hard |
| Latina | 36.7 | 367 | very hard |
| Cinisello Balsamo | 29.5 | 295 | very hard |
| Gela | 37 | 370 | very hard |
| Aprilia | 8.5 | 85 | moderately hard |
| Quartu Sant'Elena | 11 | 110 | moderately hard |
| Castellammare di Stabia | 43 | 430 | very hard |
| Caltanissetta | 17 | 170 | hard |
| Fano | 30 | 300 | very hard |
| Grosseto | 9 | 90 | moderately hard |
| Matera | 18.2 | 182 | very hard |
| Olbia | 6.4 | 64 | moderately hard |
| Benevento | 23 | 230 | very hard |
| Legnano | 26 | 260 | very hard |
| Foligno | 24.4 | 244 | very hard |
| Potenza | 19 | 190 | very hard |
| Moncalieri | 19.2 | 192 | very hard |
| Teramo | 12 | 120 | hard |
| Siena | 23 | 230 | very hard |
| Portici | 40 | 400 | very hard |
| Ercolano | 41 | 410 | very hard |
| Velletri | 8.8 | 88 | moderately hard |
| Venezia | 28.6 | 286 | very hard |
| Nettuno | 9 | 90 | moderately hard |
| Scafati | 44 | 440 | very hard |
| Rivoli | 32.8 | 328 | very hard |
| Avellino | 18.3 | 183 | very hard |