Average 222 ppm across 345 postcodes served.
Severn Trent Water serves around 8 million customers across the Midlands and mid-Wales. Water hardness varies significantly across the region, from soft upland sources to hard groundwater from limestone.
Every postcode district, sorted by hardness.
| Postcode | Town | Hardness | PPM | Level |
|---|---|---|---|---|
| NG31 | Grantham | 300 ppm | Hard | |
| WV9 | Wolverhampton | 297 ppm | Hard | |
| WV8 | Wolverhampton | 296 ppm | Hard | |
| WV7 | Wolverhampton | 295 ppm | Hard | |
| WV6 | Wolverhampton | 294 ppm | Hard | |
| WV5 | Wolverhampton | 293 ppm | Hard | |
| WV4 | Wolverhampton | 292 ppm | Hard | |
| WV3 | Wolverhampton | 291 ppm | Hard | |
| LE9 | Leicester | 290 ppm | Hard | |
| WV2 | Wolverhampton | 290 ppm | Hard | |
| LE8 | Leicester | 289 ppm | Hard | |
| WV1 | Wolverhampton | 289 ppm | Hard | |
| LE7 | Leicester | 288 ppm | Hard | |
| B80 | Studley | 287 ppm | Hard | |
| LE6 | Leicester | 287 ppm | Hard | |
| BH19 | Swanage | 286 ppm | Hard | |
| LE5 | Leicester | 286 ppm | Hard | |
| SO45 | Southampton | 286 ppm | Hard | |
| BH18 | Broadstone | 285 ppm | Hard | |
| LE4 | Leicester | 285 ppm | Hard | |
| BH17 | Poole | 284 ppm | Hard | |
| LE3 | Leicester | 284 ppm | Hard | |
| SO43 | Lyndhurst | 284 ppm | Hard | |
| BH16 | Poole | 283 ppm | Hard | |
| DE45 | Bakewell | 283 ppm | Hard | |
| LE2 | Leicester | 283 ppm | Hard | |
| SO42 | Brockenhurst | 283 ppm | Hard | |
| BH15 | Poole | 282 ppm | Hard | |
| LE1 | Leicester | 282 ppm | Hard | |
| SO41 | Lymington | 282 ppm | Hard | |
| B38 | Birmingham | 281 ppm | Hard | |
| BH14 | Poole | 281 ppm | Hard | |
| SO40 | Southampton | 281 ppm | Hard | |
| B37 | Birmingham | 280 ppm | Hard | |
| BH13 | Branksome Park | 280 ppm | Hard | |
| B36 | Birmingham | 279 ppm | Hard | |
| BH12 | Poole | 279 ppm | Hard | |
| WR15 | Tenbury Wells | 279 ppm | Hard | |
| B35 | Birmingham | 278 ppm | Hard | |
| BH11 | Bournemouth | 278 ppm | Hard | |
| WR14 | Malvern | 278 ppm | Hard | |
| B34 | Birmingham | 277 ppm | Hard | |
| BH10 | Bournemouth | 277 ppm | Hard | |
| TF9 | Market Drayton | 277 ppm | Hard | |
| WR13 | Malvern | 277 ppm | Hard | |
| B33 | Birmingham | 276 ppm | Hard | |
| TF8 | Telford | 276 ppm | Hard | |
| WR12 | Broadway | 276 ppm | Hard | |
| B32 | Birmingham | 275 ppm | Hard | |
| TF7 | Telford | 275 ppm | Hard | |
| WR11 | Evesham | 275 ppm | Hard | |
| B31 | Birmingham | 274 ppm | Hard | |
| CV13 | Nuneaton | 274 ppm | Hard | |
| TF6 | Telford | 274 ppm | Hard | |
| WR10 | Pershore | 274 ppm | Hard | |
| B30 | Birmingham | 273 ppm | Hard | |
| CV12 | Bedworth | 273 ppm | Hard | |
| TF5 | Telford | 273 ppm | Hard | |
| CV11 | Nuneaton | 272 ppm | Hard | |
| TF4 | Telford | 272 ppm | Hard | |
| CV10 | Nuneaton | 271 ppm | Hard | |
| NG25 | Southwell | 271 ppm | Hard | |
| TF3 | Telford | 271 ppm | Hard | |
| NG24 | Newark | 270 ppm | Hard | |
| TF2 | Telford | 270 ppm | Hard | |
| NG23 | Newark | 269 ppm | Hard | |
| NG9 | Nottingham | 269 ppm | Hard | |
| TF1 | Telford | 269 ppm | Hard | |
| NG22 | Newark | 268 ppm | Hard | |
| NG8 | Nottingham | 268 ppm | Hard | |
| NG21 | Mansfield | 267 ppm | Hard | |
| NG7 | Nottingham | 267 ppm | Hard | |
| NG20 | Mansfield | 266 ppm | Hard | |
| NG6 | Nottingham | 266 ppm | Hard | |
| NG5 | Nottingham | 265 ppm | Hard | |
| NG4 | Nottingham | 264 ppm | Hard | |
| B79 | Tamworth | 263 ppm | Hard | |
| NG3 | Nottingham | 263 ppm | Hard | |
| B78 | Tamworth | 262 ppm | Hard | |
| NG2 | Nottingham | 262 ppm | Hard | |
| B77 | Tamworth | 261 ppm | Hard | |
| CV9 | Atherstone | 261 ppm | Hard | |
| NG1 | Nottingham | 261 ppm | Hard | |
| B76 | Sutton Coldfield | 260 ppm | Hard | |
| CV8 | Kenilworth | 260 ppm | Hard | |
| B75 | Sutton Coldfield | 259 ppm | Hard | |
| CV7 | Coventry | 259 ppm | Hard | |
| B74 | Sutton Coldfield | 258 ppm | Hard | |
| CV6 | Coventry | 258 ppm | Hard | |
| B73 | Sutton Coldfield | 257 ppm | Hard | |
| CV5 | Coventry | 257 ppm | Hard | |
| WV16 | Bridgnorth | 257 ppm | Hard | |
| B72 | Sutton Coldfield | 256 ppm | Hard | |
| CV4 | Coventry | 256 ppm | Hard | |
| WV15 | Bridgnorth | 256 ppm | Hard | |
| B71 | West Bromwich | 255 ppm | Hard | |
| CV3 | Coventry | 255 ppm | Hard | |
| WV14 | Bilston | 255 ppm | Hard | |
| B70 | West Bromwich | 254 ppm | Hard | |
| CV2 | Coventry | 254 ppm | Hard | |
| ST9 | Stoke On Trent | 254 ppm | Hard | |
| WV13 | Willenhall | 254 ppm | Hard | |
| CV1 | Coventry | 253 ppm | Hard | |
| ST8 | Stoke On Trent | 253 ppm | Hard | |
| WV12 | Willenhall | 253 ppm | Hard | |
| ST7 | Stoke On Trent | 252 ppm | Hard | |
| WV11 | Wolverhampton | 252 ppm | Hard | |
| ST6 | Stoke On Trent | 251 ppm | Hard | |
| WV10 | Wolverhampton | 251 ppm | Hard | |
| SO32 | Southampton | 250 ppm | Hard | |
| ST5 | Newcastle | 250 ppm | Hard | |
| B29 | Birmingham | 249 ppm | Hard | |
| SO31 | Southampton | 249 ppm | Hard | |
| ST4 | Stoke On Trent | 249 ppm | Hard | |
| B28 | Birmingham | 248 ppm | Hard | |
| SO30 | Southampton | 248 ppm | Hard | |
| ST3 | Stoke On Trent | 248 ppm | Hard | |
| B27 | Birmingham | 247 ppm | Hard | |
| ST2 | Stoke On Trent | 247 ppm | Hard | |
| B26 | Birmingham | 246 ppm | Hard | |
| ST1 | Stoke On Trent | 246 ppm | Hard | |
| B25 | Birmingham | 245 ppm | Hard | |
| B24 | Birmingham | 244 ppm | Hard | |
| CA28 | Whitehaven | 244 ppm | Hard | |
| B23 | Birmingham | 243 ppm | Hard | |
| CA27 | St Bees | 243 ppm | Hard | |
| CA26 | Frizington | 242 ppm | Hard | |
| NG19 | Mansfield | 242 ppm | Hard | |
| B21 | Birmingham | 241 ppm | Hard | |
| CA25 | Cleator Moor | 241 ppm | Hard | |
| DY9 | Stourbridge | 241 ppm | Hard | |
| NG18 | Mansfield | 241 ppm | Hard | |
| B20 | Birmingham | 240 ppm | Hard | |
| CA24 | Moor Row | 240 ppm | Hard | |
| DY8 | Stourbridge | 240 ppm | Hard | |
| NG17 | Sutton In Ashfield | 240 ppm | Hard | |
| CA23 | Cleator | 239 ppm | Hard | |
| DY7 | Stourbridge | 239 ppm | Hard | |
| NG16 | Nottingham | 239 ppm | Hard | |
| CA22 | Egremont | 238 ppm | Hard | |
| DY6 | Kingswinford | 238 ppm | Hard | |
| NG15 | Nottingham | 238 ppm | Hard | |
| CA21 | Beckermet | 237 ppm | Hard | |
| DY5 | Brierley Hill | 237 ppm | Hard | |
| NG14 | Nottingham | 237 ppm | Hard | |
| CA20 | Seascale | 236 ppm | Hard | |
| DY4 | Tipton | 236 ppm | Hard | |
| NG13 | Nottingham | 236 ppm | Hard | |
| DY3 | Dudley | 235 ppm | Hard | |
| NG12 | Nottingham | 235 ppm | Hard | |
| DY2 | Dudley | 234 ppm | Hard | |
| NG11 | Nottingham | 234 ppm | Hard | |
| DY1 | Dudley | 233 ppm | Hard | |
| NG10 | Nottingham | 233 ppm | Hard | |
| DE75 | Heanor | 231 ppm | Hard | |
| B69 | Oldbury | 230 ppm | Hard | |
| DE74 | Derby | 230 ppm | Hard | |
| B68 | Oldbury | 229 ppm | Hard | |
| DE73 | Derby | 229 ppm | Hard | |
| B67 | Smethwick | 228 ppm | Hard | |
| DE72 | Derby | 228 ppm | Hard | |
| B66 | Smethwick | 227 ppm | Hard | |
| B65 | Rowley Regis | 226 ppm | Hard | |
| CV47 | Southam | 226 ppm | Hard | |
| B64 | Cradley Heath | 225 ppm | Hard | |
| ST21 | Stafford | 225 ppm | Hard | |
| B63 | Halesowen | 224 ppm | Hard | |
| ST20 | Stafford | 224 ppm | Hard | |
| B62 | Halesowen | 223 ppm | Hard | |
| B61 | Bromsgrove | 222 ppm | Hard | |
| B60 | Bromsgrove | 221 ppm | Hard | |
| BH9 | Bournemouth | 220 ppm | Hard | |
| BH8 | Bournemouth | 219 ppm | Hard | |
| DY14 | Kidderminster | 219 ppm | Hard | |
| SO24 | Alresford | 219 ppm | Hard | |
| BH7 | Bournemouth | 218 ppm | Hard | |
| DY13 | Stourport On Severn | 218 ppm | Hard | |
| SO23 | Winchester | 218 ppm | Hard | |
| BH6 | Bournemouth | 217 ppm | Hard | |
| DY12 | Bewdley | 217 ppm | Hard | |
| SO22 | Winchester | 217 ppm | Hard | |
| B19 | Birmingham | 216 ppm | Hard | |
| BH5 | Bournemouth | 216 ppm | Hard | |
| DE24 | Derby | 216 ppm | Hard | |
| DY11 | Kidderminster | 216 ppm | Hard | |
| SO21 | Winchester | 216 ppm | Hard | |
| B18 | Birmingham | 215 ppm | Hard | |
| BH4 | Bournemouth | 215 ppm | Hard | |
| DE23 | Derby | 215 ppm | Hard | |
| DY10 | Kidderminster | 215 ppm | Hard | |
| SO20 | Stockbridge | 215 ppm | Hard | |
| B17 | Birmingham | 214 ppm | Hard | |
| BH3 | Bournemouth | 214 ppm | Hard | |
| DE22 | Derby | 214 ppm | Hard | |
| B16 | Birmingham | 213 ppm | Hard | |
| BH2 | Bournemouth | 213 ppm | Hard | |
| DE21 | Derby | 213 ppm | Hard | |
| B15 | Birmingham | 212 ppm | Hard | |
| BH1 | Bournemouth | 212 ppm | Hard | |
| CA19 | Holmrook | 212 ppm | Hard | |
| B14 | Birmingham | 211 ppm | Hard | |
| CA18 | Ravenglass | 211 ppm | Hard | |
| B13 | Birmingham | 210 ppm | Hard | |
| CA17 | Kirkby Stephen | 210 ppm | Hard | |
| B12 | Birmingham | 209 ppm | Hard | |
| CA16 | Appleby In Westmorland | 209 ppm | Hard | |
| B11 | Birmingham | 208 ppm | Hard | |
| CA15 | Maryport | 208 ppm | Hard | |
| B10 | Birmingham | 207 ppm | Hard | |
| CA14 | Workington | 207 ppm | Hard | |
| CA13 | Cockermouth | 206 ppm | Hard | |
| CA12 | Keswick | 205 ppm | Hard | |
| CA11 | Penrith | 204 ppm | Hard | |
| CA10 | Penrith | 203 ppm | Hard | |
| ST19 | Stafford | 200 ppm | Hard | |
| ST18 | Stafford | 199 ppm | Hard | |
| DE65 | Derby | 198 ppm | Hard | |
| ST17 | Stafford | 198 ppm | Hard | |
| TF13 | Much Wenlock | 198 ppm | Hard | |
| WS9 | Walsall | 198 ppm | Hard | |
| ST16 | Stafford | 197 ppm | Hard | |
| TF12 | Broseley | 197 ppm | Hard | |
| WS8 | Walsall | 197 ppm | Hard | |
| ST15 | Stone | 196 ppm | Hard | |
| TF11 | Shifnal | 196 ppm | Hard | |
| WS7 | Burntwood | 196 ppm | Hard | |
| ST14 | Uttoxeter | 195 ppm | Hard | |
| TF10 | Newport | 195 ppm | Hard | |
| WS6 | Walsall | 195 ppm | Hard | |
| ST13 | Leek | 194 ppm | Hard | |
| WS5 | Walsall | 194 ppm | Hard | |
| BH31 | Verwood | 193 ppm | Hard | |
| CV37 | Stratford Upon Avon | 193 ppm | Hard | |
| ST12 | Stoke On Trent | 193 ppm | Hard | |
| WS4 | Walsall | 193 ppm | Hard | |
| CV36 | Shipston On Stour | 192 ppm | Hard | |
| LE67 | Coalville | 192 ppm | Hard | |
| ST11 | Stoke On Trent | 192 ppm | Hard | |
| WS3 | Walsall | 192 ppm | Hard | |
| CV35 | Warwick | 191 ppm | Hard | |
| SO19 | Southampton | 191 ppm | Hard | |
| ST10 | Stoke On Trent | 191 ppm | Hard | |
| WS2 | Walsall | 191 ppm | Hard | |
| CV34 | Warwick | 190 ppm | Hard | |
| LE65 | Ashby De La Zouch | 190 ppm | Hard | |
| SO18 | Southampton | 190 ppm | Hard | |
| WS1 | Walsall | 190 ppm | Hard | |
| CV33 | Leamington Spa | 189 ppm | Hard | |
| SO17 | Southampton | 189 ppm | Hard | |
| B50 | Alcester | 188 ppm | Hard | |
| CV32 | Leamington Spa | 188 ppm | Hard | |
| SO16 | Southampton | 188 ppm | Hard | |
| CV31 | Leamington Spa | 187 ppm | Hard | |
| SO15 | Southampton | 187 ppm | Hard | |
| SO14 | Southampton | 186 ppm | Hard | |
| DE15 | Burton On Trent | 184 ppm | Hard | |
| DE14 | Burton On Trent | 183 ppm | Hard | |
| DE7 | Ilkeston | 183 ppm | Hard | |
| DE13 | Burton On Trent | 182 ppm | Hard | |
| DE6 | Ashbourne | 182 ppm | Hard | |
| DE12 | Swadlincote | 181 ppm | Hard | |
| DE5 | Ripley | 181 ppm | Hard | |
| DE11 | Swadlincote | 180 ppm | Moderately Hard | |
| DE4 | Matlock | 180 ppm | Moderately Hard | |
| LE19 | Leicester | 180 ppm | Moderately Hard | |
| DE3 | Derby | 179 ppm | Moderately Hard | |
| LE18 | Wigston | 179 ppm | Moderately Hard | |
| LE17 | Lutterworth | 178 ppm | Moderately Hard | |
| B98 | Redditch | 177 ppm | Moderately Hard | |
| DE1 | Derby | 177 ppm | Moderately Hard | |
| LE16 | Market Harborough | 177 ppm | Moderately Hard | |
| B97 | Redditch | 176 ppm | Moderately Hard | |
| LE15 | Oakham | 176 ppm | Moderately Hard | |
| B96 | Redditch | 175 ppm | Moderately Hard | |
| LE14 | Melton Mowbray | 175 ppm | Moderately Hard | |
| B95 | Henley In Arden | 174 ppm | Moderately Hard | |
| LE13 | Melton Mowbray | 174 ppm | Moderately Hard | |
| B94 | Solihull | 173 ppm | Moderately Hard | |
| LE12 | Loughborough | 173 ppm | Moderately Hard | |
| B9 | Birmingham | 172 ppm | Moderately Hard | |
| B93 | Solihull | 172 ppm | Moderately Hard | |
| CA9 | Alston | 172 ppm | Moderately Hard | |
| LE11 | Loughborough | 172 ppm | Moderately Hard | |
| B8 | Birmingham | 171 ppm | Moderately Hard | |
| B92 | Solihull | 171 ppm | Moderately Hard | |
| CA8 | Brampton | 171 ppm | Moderately Hard | |
| LE10 | Hinckley | 171 ppm | Moderately Hard | |
| B7 | Birmingham | 170 ppm | Moderately Hard | |
| B91 | Solihull | 170 ppm | Moderately Hard | |
| CA7 | Wigton | 170 ppm | Moderately Hard | |
| B6 | Birmingham | 169 ppm | Moderately Hard | |
| B90 | Solihull | 169 ppm | Moderately Hard | |
| CA6 | Carlisle | 169 ppm | Moderately Hard | |
| B5 | Birmingham | 168 ppm | Moderately Hard | |
| CA5 | Carlisle | 168 ppm | Moderately Hard | |
| B4 | Birmingham | 167 ppm | Moderately Hard | |
| CA4 | Carlisle | 167 ppm | Moderately Hard | |
| B3 | Birmingham | 166 ppm | Moderately Hard | |
| CA3 | Carlisle | 166 ppm | Moderately Hard | |
| DE56 | Belper | 166 ppm | Moderately Hard | |
| SO53 | Eastleigh | 166 ppm | Moderately Hard | |
| B2 | Birmingham | 165 ppm | Moderately Hard | |
| CA2 | Carlisle | 165 ppm | Moderately Hard | |
| DE55 | Alfreton | 165 ppm | Moderately Hard | |
| SO52 | Southampton | 165 ppm | Moderately Hard | |
| WR9 | Droitwich | 165 ppm | Moderately Hard | |
| B1 | Birmingham | 164 ppm | Moderately Hard | |
| B49 | Alcester | 164 ppm | Moderately Hard | |
| BH25 | New Milton | 164 ppm | Moderately Hard | |
| CA1 | Carlisle | 164 ppm | Moderately Hard | |
| SO51 | Romsey | 164 ppm | Moderately Hard | |
| WR8 | Worcester | 164 ppm | Moderately Hard | |
| B48 | Birmingham | 163 ppm | Moderately Hard | |
| BH24 | Ringwood | 163 ppm | Moderately Hard | |
| SO50 | Eastleigh | 163 ppm | Moderately Hard | |
| WR7 | Worcester | 163 ppm | Moderately Hard | |
| B47 | Birmingham | 162 ppm | Moderately Hard | |
| BH23 | Christchurch | 162 ppm | Moderately Hard | |
| NG80 | Nottingham | 162 ppm | Moderately Hard | |
| WR6 | Worcester | 162 ppm | Moderately Hard | |
| B46 | Birmingham | 161 ppm | Moderately Hard | |
| BH22 | Ferndown | 161 ppm | Moderately Hard | |
| WR5 | Worcester | 161 ppm | Moderately Hard | |
| B45 | Birmingham | 160 ppm | Moderately Hard | |
| BH21 | Wimborne | 160 ppm | Moderately Hard | |
| WR4 | Worcester | 160 ppm | Moderately Hard | |
| WS15 | Rugeley | 160 ppm | Moderately Hard | |
| B44 | Birmingham | 159 ppm | Moderately Hard | |
| BH20 | Wareham | 159 ppm | Moderately Hard | |
| WR3 | Worcester | 159 ppm | Moderately Hard | |
| WS14 | Lichfield | 159 ppm | Moderately Hard | |
| B43 | Birmingham | 158 ppm | Moderately Hard | |
| WR2 | Worcester | 158 ppm | Moderately Hard | |
| WS13 | Lichfield | 158 ppm | Moderately Hard | |
| B42 | Birmingham | 157 ppm | Moderately Hard | |
| WR1 | Worcester | 157 ppm | Moderately Hard | |
| WS12 | Cannock | 157 ppm | Moderately Hard | |
| CV23 | Rugby | 156 ppm | Moderately Hard | |
| WS11 | Cannock | 156 ppm | Moderately Hard | |
| CV22 | Rugby | 155 ppm | Moderately Hard | |
| WS10 | Wednesbury | 155 ppm | Moderately Hard | |
| CV21 | Rugby | 154 ppm | Moderately Hard | |
| NG34 | Sleaford | 152 ppm | Moderately Hard | |
| NG33 | Grantham | 151 ppm | Moderately Hard | |
| NG32 | Grantham | 150 ppm | Moderately Hard |
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