Tap water hardness in Wiltshire
We have published hardness data for 34 cities in Wiltshire. The median is 304 mg/L; the hardest water is in Holt (371 mg/L), the softest in Netheravon (222 mg/L).
100 % of these cities have hard or very hard water (over 120 mg/L).
UK suppliers report mg/L CaCO₃ and often Clark degrees (1 °Clark = 14.25 mg/L).
Cities in Wiltshire, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Holt | 371 | 371 | very hard |
| Seend | 367 | 367 | very hard |
| Westwood | 365 | 365 | very hard |
| Bradford on Avon | 360 | 360 | very hard |
| Calne | 358 | 358 | very hard |
| Devizes | 354 | 354 | very hard |
| Melksham | 345 | 345 | very hard |
| Chippenham | 342 | 342 | very hard |
| Potterne | 334 | 334 | very hard |
| Corsham | 330 | 330 | very hard |
| Whitley | 330 | 330 | very hard |
| Neston | 329 | 329 | very hard |
| Box | 328 | 328 | very hard |
| Malmesbury | 328 | 328 | very hard |
| Sutton Benger | 326 | 326 | very hard |
| Minety | 306 | 306 | very hard |
| Westbury | 305 | 305 | very hard |
| Dinton | 304 | 304 | very hard |
| Market Lavington | 297 | 297 | very hard |
| Wilton | 296 | 296 | very hard |
| Salisbury | 292 | 292 | very hard |
| Tidworth | 291 | 291 | very hard |
| Ludgershall | 286 | 286 | very hard |
| Trowbridge | 286 | 286 | very hard |
| Tisbury | 283 | 283 | very hard |
| Bratton | 280 | 280 | very hard |
| Warminster | 280 | 280 | very hard |
| Durrington | 278 | 278 | very hard |
| Burbage | 276 | 276 | very hard |
| Mere | 274 | 274 | very hard |
| Amesbury | 271 | 271 | very hard |
| Shrewton | 270 | 270 | very hard |
| Pewsey | 224 | 224 | very hard |
| Netheravon | 222 | 222 | very hard |