Hardest and softest tap water in Italy
All 629 cities in Italy with published data, ranked by total hardness. The national median is 21.2 °fH.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
25 cities with the hardest water
| # | °fH | mg/L | ||
|---|---|---|---|---|
| 1 | Angri · Campania | 63 | 630 | very hard |
| 2 | Fiano Romano · Lazio | 62 | 620 | very hard |
| 3 | Nola · Campania | 55 | 550 | very hard |
| 4 | Sant'Antonio Abate · Campania | 51 | 510 | very hard |
| 5 | Marigliano · Campania | 50 | 500 | very hard |
| 6 | Brusciano · Campania | 44 | 440 | very hard |
| 7 | Poggiomarino · Campania | 44 | 440 | very hard |
| 8 | Scafati · Campania | 44 | 440 | very hard |
| 9 | Terzigno · Campania | 44 | 440 | very hard |
| 10 | San Felice Circeo · Lazio | 43.4 | 434 | very hard |
| 11 | Boscoreale · Campania | 43 | 430 | very hard |
| 12 | Castellammare di Stabia · Campania | 43 | 430 | very hard |
| 13 | Pompei · Campania | 43 | 430 | very hard |
| 14 | Torre Annunziata · Campania | 43 | 430 | very hard |
| 15 | Nocera Inferiore · Campania | 42 | 420 | very hard |
| 16 | Torre del Greco · Campania | 42 | 420 | very hard |
| 17 | Rosta · Piemonte | 41.5 | 415 | very hard |
| 18 | Pontinia · Lazio | 41.3 | 413 | very hard |
| 19 | Moncenisio · Piemonte | 41.2 | 412 | very hard |
| 20 | Ercolano · Campania | 41 | 410 | very hard |
| 21 | Locate di Triulzi · Lombardia | 40.3 | 403 | very hard |
| 22 | Casalnuovo di Napoli · Campania | 40 | 400 | very hard |
| 23 | Cercola · Campania | 40 | 400 | very hard |
| 24 | Portici · Campania | 40 | 400 | very hard |
| 25 | San Giorgio a Cremano · Campania | 40 | 400 | very hard |
25 cities with the softest water
| # | °fH | mg/L | ||
|---|---|---|---|---|
| 1 | Viù · Piemonte | 1 | 10 | soft |
| 2 | Traversella · Piemonte | 1 | 10 | soft |
| 3 | Noasca · Piemonte | 1 | 10 | soft |
| 4 | Locana · Piemonte | 1 | 10 | soft |
| 5 | Groscavallo · Piemonte | 1 | 10 | soft |
| 6 | Cantoira · Piemonte | 1 | 10 | soft |
| 7 | Traves · Piemonte | 2 | 20 | soft |
| 8 | Pont Canavese · Piemonte | 2 | 20 | soft |
| 9 | Germagnano · Piemonte | 2 | 20 | soft |
| 10 | Bibiana · Piemonte | 2 | 20 | soft |
| 11 | Ala di Stura · Piemonte | 2 | 20 | soft |
| 12 | Genzano di Roma · Lazio | 2.7 | 27 | soft |
| 13 | Rorà · Piemonte | 3 | 30 | soft |
| 14 | Pessinetto · Piemonte | 3 | 30 | soft |
| 15 | Baldissero Canavese · Piemonte | 3 | 30 | soft |
| 16 | Nuoro · Sardegna | 3.2 | 32 | soft |
| 17 | Mathi · Piemonte | 3.9 | 39 | soft |
| 18 | Villanova Canavese · Piemonte | 4 | 40 | soft |
| 19 | Cumiana · Piemonte | 4 | 40 | soft |
| 20 | Vaie · Piemonte | 4 | 40 | soft |
| 21 | Sparone · Piemonte | 4 | 40 | soft |
| 22 | Luserna · Piemonte | 4 | 40 | soft |
| 23 | Cafasse · Piemonte | 4 | 40 | soft |
| 24 | Grosso · Piemonte | 4.2 | 42 | soft |
| 25 | Ribordone · Piemonte | 4.5 | 45 | soft |