South East · County

Water hardness in Berkshire

Average 291 ppm across 40 postcodes and 2 towns.

  • Range 250–350 ppm
  • Towns 2
  • Suppliers Thames Water
County average
291
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+
291
Avg ppm
250
Min ppm
350
Max ppm
40
Postcodes

Water Hardness Across Berkshire

The average water hardness in Berkshire is 291 ppm, classified as hard. Across 40 postcode districts in the South East region, hardness ranges from 250 ppm to 350 ppm.

Berkshire is served by Thames Water. With hard water, residents may benefit from a water softener to reduce limescale and protect appliances.

By town

Towns in Berkshire

Sorted by hardness — tap a town for full details.

Town Hardness PPM Level
Reading
291
291 ppm Hard
Iver
291
291 ppm Hard
Suppliers

Water Companies in Berkshire

Companies supplying water to this county.

Thames Water

302 ppm Very Hard
All postcodes

Postcodes in Berkshire

Every postcode district in the county, sorted by hardness.

Postcode Town Hardness PPM Level
SL3 Slough
350
350 ppm Very Hard
SL2 Slough
349
349 ppm Very Hard
SL1 Slough
348
348 ppm Very Hard
SL0 Iver
347
347 ppm Very Hard
RG31 Reading
327
327 ppm Very Hard
RG30 Reading
326
326 ppm Very Hard
RG9 Henley On Thames
314
314 ppm Very Hard
RG8 Reading
313
313 ppm Very Hard
RG7 Reading
312
312 ppm Very Hard
RG6 Reading
311
311 ppm Very Hard
RG5 Reading
310
310 ppm Very Hard
RG4 Reading
309
309 ppm Very Hard
RG2 Reading
307
307 ppm Very Hard
RG1 Reading
306
306 ppm Very Hard
RG29 Hook
302
302 ppm Very Hard
RG28 Whitchurch
301
301 ppm Very Hard
RG27 Hook
300
300 ppm Hard
RG26 Tadley
299
299 ppm Hard
RG25 Basingstoke
298
298 ppm Hard
RG24 Basingstoke
297
297 ppm Hard
RG23 Basingstoke
296
296 ppm Hard
RG22 Basingstoke
295
295 ppm Hard
RG21 Basingstoke
294
294 ppm Hard
RG20 Newbury
293
293 ppm Hard
RG19 Thatcham
269
269 ppm Hard
RG18 Thatcham
268
268 ppm Hard
RG17 Hungerford
267
267 ppm Hard
RG14 Newbury
264
264 ppm Hard
RG45 Crowthorne
263
263 ppm Hard
RG12 Bracknell
262
262 ppm Hard
RG10 Reading
260
260 ppm Hard
RG42 Bracknell
260
260 ppm Hard
RG41 Wokingham
259
259 ppm Hard
RG40 Wokingham
258
258 ppm Hard
SL9 Gerrards Cross
255
255 ppm Hard
SL8 Bourne End
254
254 ppm Hard
SL7 Marlow
253
253 ppm Hard
SL6 Maidenhead
252
252 ppm Hard
SL5 Ascot
251
251 ppm Hard
SL4 Windsor
250
250 ppm Hard
Recommended

Products for Berkshire

Top picks for households in hard water areas.

Water2Buy W2B200 Water Softener

From ~£400

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 Amazon

Philips AWP1775 Shower Filter

From ~£30

Instant improvement for skin and hair. Reduces chlorine and limescale at the showerhead — no plumbing needed. A good first step before committing to a full softener.

View on Amazon

Hard Water Guides

Learn more about water hardness and how to manage it.

What Is Water Hardness? Hard Water Effects Solutions
All counties in South East · Hardest water areas · Softest water areas · Hard water solutions

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