Average 321 ppm across 261 postcodes served.
Anglian Water supplies water to over 4.8 million customers in the east of England, one of the driest regions in the UK. The chalk and limestone geology of East Anglia means the water is among the hardest in the country.
Every postcode district, sorted by hardness.
| Postcode | Town | Hardness | PPM | Level |
|---|---|---|---|---|
| CM19 | Harlow | 394 ppm | Very Hard | |
| CM18 | Harlow | 393 ppm | Very Hard | |
| IP33 | Bury St Edmunds | 393 ppm | Very Hard | |
| CM17 | Harlow | 392 ppm | Very Hard | |
| IP32 | Bury St Edmunds | 392 ppm | Very Hard | |
| NR19 | Dereham | 392 ppm | Very Hard | |
| CM16 | Epping | 391 ppm | Very Hard | |
| IP31 | Bury St Edmunds | 391 ppm | Very Hard | |
| NR18 | Wymondham | 391 ppm | Very Hard | |
| CM15 | Brentwood | 390 ppm | Very Hard | |
| IP30 | Bury St Edmunds | 390 ppm | Very Hard | |
| NR17 | Attleborough | 390 ppm | Very Hard | |
| CM14 | Brentwood | 389 ppm | Very Hard | |
| NR16 | Norwich | 389 ppm | Very Hard | |
| CM13 | Brentwood | 388 ppm | Very Hard | |
| NR15 | Norwich | 388 ppm | Very Hard | |
| CM12 | Billericay | 387 ppm | Very Hard | |
| NR14 | Norwich | 387 ppm | Very Hard | |
| CM11 | Billericay | 386 ppm | Very Hard | |
| NR13 | Norwich | 386 ppm | Very Hard | |
| LN9 | Horncastle | 385 ppm | Very Hard | |
| NR12 | Norwich | 385 ppm | Very Hard | |
| LN8 | Market Rasen | 384 ppm | Very Hard | |
| NR11 | Norwich | 384 ppm | Very Hard | |
| LN7 | Market Rasen | 383 ppm | Very Hard | |
| NR10 | Norwich | 383 ppm | Very Hard | |
| LN6 | Lincoln | 382 ppm | Very Hard | |
| LN5 | Lincoln | 381 ppm | Very Hard | |
| LN4 | Lincoln | 380 ppm | Very Hard | |
| LN3 | Lincoln | 379 ppm | Very Hard | |
| LN2 | Lincoln | 378 ppm | Very Hard | |
| SG9 | Buntingford | 378 ppm | Very Hard | |
| LN1 | Lincoln | 377 ppm | Very Hard | |
| SG8 | Royston | 377 ppm | Very Hard | |
| SG7 | Baldock | 376 ppm | Very Hard | |
| SG6 | Letchworth Garden City | 375 ppm | Very Hard | |
| SG5 | Hitchin | 374 ppm | Very Hard | |
| CB25 | Cambridge | 373 ppm | Very Hard | |
| SG4 | Hitchin | 373 ppm | Very Hard | |
| CB24 | Cambridge | 372 ppm | Very Hard | |
| SG3 | Knebworth | 372 ppm | Very Hard | |
| CB23 | Cambridge | 371 ppm | Very Hard | |
| SG2 | Stevenage | 371 ppm | Very Hard | |
| CB22 | Cambridge | 370 ppm | Very Hard | |
| SG1 | Stevenage | 370 ppm | Very Hard | |
| CB21 | Cambridge | 369 ppm | Very Hard | |
| PE9 | Stamford | 367 ppm | Very Hard | |
| CM9 | Maldon | 366 ppm | Very Hard | |
| IP29 | Bury St Edmunds | 366 ppm | Very Hard | |
| PE8 | Peterborough | 366 ppm | Very Hard | |
| CM8 | Witham | 365 ppm | Very Hard | |
| IP28 | Bury St Edmunds | 365 ppm | Very Hard | |
| PE7 | Peterborough | 365 ppm | Very Hard | |
| CM7 | Braintree | 364 ppm | Very Hard | |
| IP27 | Brandon | 364 ppm | Very Hard | |
| PE6 | Peterborough | 364 ppm | Very Hard | |
| CM6 | Dunmow | 363 ppm | Very Hard | |
| IP26 | Thetford | 363 ppm | Very Hard | |
| PE5 | Peterborough | 363 ppm | Very Hard | |
| CM5 | Ongar | 362 ppm | Very Hard | |
| IP25 | Thetford | 362 ppm | Very Hard | |
| PE4 | Peterborough | 362 ppm | Very Hard | |
| CM4 | Ingatestone | 361 ppm | Very Hard | |
| IP24 | Thetford | 361 ppm | Very Hard | |
| PE3 | Peterborough | 361 ppm | Very Hard | |
| CM3 | Chelmsford | 360 ppm | Very Hard | |
| IP23 | Eye | 360 ppm | Very Hard | |
| PE2 | Peterborough | 360 ppm | Very Hard | |
| CM2 | Chelmsford | 359 ppm | Very Hard | |
| IP22 | Diss | 359 ppm | Very Hard | |
| PE1 | Peterborough | 359 ppm | Very Hard | |
| CM1 | Chelmsford | 358 ppm | Very Hard | |
| IP21 | Diss | 358 ppm | Very Hard | |
| CM0 | Burnham On Crouch | 357 ppm | Very Hard | |
| IP20 | Harleston | 357 ppm | Very Hard | |
| IP9 | Ipswich | 355 ppm | Very Hard | |
| IP8 | Ipswich | 354 ppm | Very Hard | |
| IP7 | Ipswich | 353 ppm | Very Hard | |
| IP6 | Ipswich | 352 ppm | Very Hard | |
| IP5 | Ipswich | 351 ppm | Very Hard | |
| IP4 | Ipswich | 350 ppm | Very Hard | |
| IP3 | Ipswich | 349 ppm | Very Hard | |
| IP2 | Ipswich | 348 ppm | Very Hard | |
| IP1 | Ipswich | 347 ppm | Very Hard | |
| PE38 | Downham Market | 341 ppm | Very Hard | |
| PE37 | Swaffham | 340 ppm | Very Hard | |
| PE36 | Hunstanton | 339 ppm | Very Hard | |
| PE34 | King's Lynn | 337 ppm | Very Hard | |
| SG19 | Sandy | 337 ppm | Very Hard | |
| CB11 | Saffron Walden | 336 ppm | Very Hard | |
| PE33 | King's Lynn | 336 ppm | Very Hard | |
| SG18 | Biggleswade | 336 ppm | Very Hard | |
| CB10 | Saffron Walden | 335 ppm | Very Hard | |
| PE32 | King's Lynn | 335 ppm | Very Hard | |
| SG17 | Shefford | 335 ppm | Very Hard | |
| PE31 | King's Lynn | 334 ppm | Very Hard | |
| SG16 | Henlow | 334 ppm | Very Hard | |
| IP19 | Halesworth | 333 ppm | Very Hard | |
| PE30 | King's Lynn | 333 ppm | Very Hard | |
| SG15 | Arlesey | 333 ppm | Very Hard | |
| IP18 | Southwold | 332 ppm | Very Hard | |
| SG14 | Hertford | 332 ppm | Very Hard | |
| IP17 | Saxmundham | 331 ppm | Very Hard | |
| SG13 | Hertford | 331 ppm | Very Hard | |
| IP16 | Leiston | 330 ppm | Very Hard | |
| SG12 | Ware | 330 ppm | Very Hard | |
| IP15 | Aldeburgh | 329 ppm | Very Hard | |
| SG11 | Ware | 329 ppm | Very Hard | |
| IP14 | Stowmarket | 328 ppm | Very Hard | |
| SG10 | Much Hadham | 328 ppm | Very Hard | |
| IP13 | Woodbridge | 327 ppm | Very Hard | |
| IP12 | Woodbridge | 326 ppm | Very Hard | |
| IP11 | Felixstowe | 325 ppm | Very Hard | |
| IP10 | Ipswich | 324 ppm | Very Hard | |
| SS9 | Leigh On Sea | 321 ppm | Very Hard | |
| MK19 | Milton Keynes | 320 ppm | Very Hard | |
| SS8 | Canvey Island | 320 ppm | Very Hard | |
| MK18 | Buckingham | 319 ppm | Very Hard | |
| SS7 | Benfleet | 319 ppm | Very Hard | |
| MK17 | Milton Keynes | 318 ppm | Very Hard | |
| MK9 | Milton Keynes | 318 ppm | Very Hard | |
| SS6 | Rayleigh | 318 ppm | Very Hard | |
| MK16 | Newport Pagnell | 317 ppm | Very Hard | |
| MK8 | Milton Keynes | 317 ppm | Very Hard | |
| SS5 | Hockley | 317 ppm | Very Hard | |
| MK15 | Milton Keynes | 316 ppm | Very Hard | |
| MK7 | Milton Keynes | 316 ppm | Very Hard | |
| SS4 | Rochford | 316 ppm | Very Hard | |
| MK14 | Milton Keynes | 315 ppm | Very Hard | |
| MK6 | Milton Keynes | 315 ppm | Very Hard | |
| SS3 | Southend On Sea | 315 ppm | Very Hard | |
| MK13 | Milton Keynes | 314 ppm | Very Hard | |
| MK5 | Milton Keynes | 314 ppm | Very Hard | |
| SS2 | Southend On Sea | 314 ppm | Very Hard | |
| MK12 | Milton Keynes | 313 ppm | Very Hard | |
| MK4 | Milton Keynes | 313 ppm | Very Hard | |
| SS1 | Southend On Sea | 313 ppm | Very Hard | |
| LU7 | Leighton Buzzard | 312 ppm | Very Hard | |
| MK11 | Milton Keynes | 312 ppm | Very Hard | |
| MK3 | Milton Keynes | 312 ppm | Very Hard | |
| SS0 | Westcliff On Sea | 312 ppm | Very Hard | |
| LU6 | Dunstable | 311 ppm | Very Hard | |
| MK10 | Milton Keynes | 311 ppm | Very Hard | |
| MK2 | Milton Keynes | 311 ppm | Very Hard | |
| LU5 | Dunstable | 310 ppm | Very Hard | |
| MK1 | Milton Keynes | 310 ppm | Very Hard | |
| LU4 | Luton | 309 ppm | Very Hard | |
| PE29 | Huntingdon | 309 ppm | Very Hard | |
| LU3 | Luton | 308 ppm | Very Hard | |
| PE28 | Huntingdon | 308 ppm | Very Hard | |
| LU2 | Luton | 307 ppm | Very Hard | |
| PE27 | St Ives | 307 ppm | Very Hard | |
| LU1 | Luton | 306 ppm | Very Hard | |
| PE26 | Huntingdon | 306 ppm | Very Hard | |
| CB9 | Haverhill | 305 ppm | Very Hard | |
| PE25 | Skegness | 305 ppm | Very Hard | |
| CB8 | Newmarket | 304 ppm | Very Hard | |
| CO16 | Clacton On Sea | 304 ppm | Very Hard | |
| PE24 | Skegness | 304 ppm | Very Hard | |
| CB7 | Ely | 303 ppm | Very Hard | |
| CO15 | Clacton On Sea | 303 ppm | Very Hard | |
| NR35 | Bungay | 303 ppm | Very Hard | |
| PE23 | Spilsby | 303 ppm | Very Hard | |
| CB6 | Ely | 302 ppm | Very Hard | |
| CO14 | Walton On The Naze | 302 ppm | Very Hard | |
| NR34 | Beccles | 302 ppm | Very Hard | |
| PE22 | Boston | 302 ppm | Very Hard | |
| CB5 | Cambridge | 301 ppm | Very Hard | |
| CO13 | Frinton On Sea | 301 ppm | Very Hard | |
| NR33 | Lowestoft | 301 ppm | Very Hard | |
| PE21 | Boston | 301 ppm | Very Hard | |
| CB4 | Cambridge | 300 ppm | Hard | |
| CO12 | Harwich | 300 ppm | Hard | |
| NR32 | Lowestoft | 300 ppm | Hard | |
| PE20 | Boston | 300 ppm | Hard | |
| CB3 | Cambridge | 299 ppm | Hard | |
| CO11 | Manningtree | 299 ppm | Hard | |
| NR31 | Great Yarmouth | 299 ppm | Hard | |
| CB2 | Cambridge | 298 ppm | Hard | |
| CO10 | Sudbury | 298 ppm | Hard | |
| NN9 | Wellingborough | 298 ppm | Hard | |
| NR30 | Great Yarmouth | 298 ppm | Hard | |
| CB1 | Cambridge | 297 ppm | Hard | |
| NN29 | Wellingborough | 297 ppm | Hard | |
| NN8 | Wellingborough | 297 ppm | Hard | |
| NN7 | Northampton | 296 ppm | Hard | |
| NN6 | Northampton | 295 ppm | Hard | |
| NN5 | Northampton | 294 ppm | Hard | |
| NN4 | Northampton | 293 ppm | Hard | |
| NN3 | Northampton | 292 ppm | Hard | |
| NN2 | Northampton | 291 ppm | Hard | |
| NN1 | Northampton | 290 ppm | Hard | |
| CM77 | Braintree | 288 ppm | Hard | |
| CO9 | Halstead | 281 ppm | Hard | |
| CO8 | Bures | 280 ppm | Hard | |
| CO7 | Colchester | 279 ppm | Hard | |
| NR9 | Norwich | 279 ppm | Hard | |
| CO6 | Colchester | 278 ppm | Hard | |
| NR8 | Norwich | 278 ppm | Hard | |
| CO5 | Colchester | 277 ppm | Hard | |
| NR7 | Norwich | 277 ppm | Hard | |
| CO4 | Colchester | 276 ppm | Hard | |
| NR6 | Norwich | 276 ppm | Hard | |
| PE19 | St Neots | 276 ppm | Hard | |
| CO3 | Colchester | 275 ppm | Hard | |
| NR5 | Norwich | 275 ppm | Hard | |
| CO2 | Colchester | 274 ppm | Hard | |
| NR29 | Great Yarmouth | 274 ppm | Hard | |
| NR4 | Norwich | 274 ppm | Hard | |
| CO1 | Colchester | 273 ppm | Hard | |
| NR28 | North Walsham | 273 ppm | Hard | |
| NR3 | Norwich | 273 ppm | Hard | |
| PE16 | Chatteris | 273 ppm | Hard | |
| NR2 | Norwich | 272 ppm | Hard | |
| NR27 | Cromer | 272 ppm | Hard | |
| PE15 | March | 272 ppm | Hard | |
| CM24 | Stansted | 271 ppm | Hard | |
| NR1 | Norwich | 271 ppm | Hard | |
| NR26 | Sheringham | 271 ppm | Hard | |
| PE14 | Wisbech | 271 ppm | Hard | |
| CM23 | Bishop's Stortford | 270 ppm | Hard | |
| NR25 | Holt | 270 ppm | Hard | |
| PE13 | Wisbech | 270 ppm | Hard | |
| CM22 | Bishop's Stortford | 269 ppm | Hard | |
| NR24 | Melton Constable | 269 ppm | Hard | |
| PE12 | Spalding | 269 ppm | Hard | |
| CM21 | Sawbridgeworth | 268 ppm | Hard | |
| NR23 | Wells Next The Sea | 268 ppm | Hard | |
| PE11 | Spalding | 268 ppm | Hard | |
| CM20 | Harlow | 267 ppm | Hard | |
| NR22 | Walsingham | 267 ppm | Hard | |
| PE10 | Bourne | 267 ppm | Hard | |
| NR21 | Fakenham | 266 ppm | Hard | |
| SS17 | Stanford Le Hope | 266 ppm | Hard | |
| MK46 | Olney | 265 ppm | Hard | |
| NR20 | Dereham | 265 ppm | Hard | |
| SS16 | Basildon | 265 ppm | Hard | |
| MK45 | Bedford | 264 ppm | Hard | |
| SS15 | Basildon | 264 ppm | Hard | |
| MK44 | Bedford | 263 ppm | Hard | |
| NN18 | Corby | 263 ppm | Hard | |
| SS14 | Basildon | 263 ppm | Hard | |
| MK43 | Bedford | 262 ppm | Hard | |
| NN17 | Corby | 262 ppm | Hard | |
| SS13 | Basildon | 262 ppm | Hard | |
| MK42 | Bedford | 261 ppm | Hard | |
| NN16 | Kettering | 261 ppm | Hard | |
| SS12 | Wickford | 261 ppm | Hard | |
| LN13 | Alford | 260 ppm | Hard | |
| MK41 | Bedford | 260 ppm | Hard | |
| NN15 | Kettering | 260 ppm | Hard | |
| SS11 | Wickford | 260 ppm | Hard | |
| LN12 | Mablethorpe | 259 ppm | Hard | |
| MK40 | Bedford | 259 ppm | Hard | |
| NN14 | Kettering | 259 ppm | Hard | |
| LN11 | Louth | 258 ppm | Hard | |
| NN13 | Brackley | 258 ppm | Hard | |
| LN10 | Woodhall Spa | 257 ppm | Hard | |
| NN12 | Towcester | 257 ppm | Hard | |
| NN11 | Daventry | 256 ppm | Hard | |
| NN10 | Rushden | 255 ppm | Hard |
Popular choices for households on very hard water.
Best-value whole-house ion-exchange softener for UK homes. Eliminates limescale from pipes, boilers, and appliances. Digital metered regeneration — low salt use. 7-year warranty.
View on AmazonA quick, affordable upgrade. Reduces chlorine and limescale at the showerhead — fits any standard UK shower hose in minutes. Protects skin and hair from hard water damage.
View on AmazonEnter your email and we will send the fixes that actually work for your hardness level, plus what to skip.