WaterWater Hardness in Berkshire
South East • 40 postcode districts • 2 towns
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 <a href="/water-softener-guide/">water softener</a> to reduce limescale and protect appliances.
Towns in Berkshire
Water Companies in Berkshire
All Postcodes in Berkshire
| Postcode | Town | Hardness | PPM | Level |
|---|---|---|---|---|
| SL3 | Slough | 350 ppm | Very Hard | |
| SL2 | Slough | 349 ppm | Very Hard | |
| SL1 | Slough | 348 ppm | Very Hard | |
| SL0 | Iver | 347 ppm | Very Hard | |
| RG31 | Reading | 327 ppm | Very Hard | |
| RG30 | Reading | 326 ppm | Very Hard | |
| RG9 | Henley On Thames | 314 ppm | Very Hard | |
| RG8 | Reading | 313 ppm | Very Hard | |
| RG7 | Reading | 312 ppm | Very Hard | |
| RG6 | Reading | 311 ppm | Very Hard | |
| RG5 | Reading | 310 ppm | Very Hard | |
| RG4 | Reading | 309 ppm | Very Hard | |
| RG2 | Reading | 307 ppm | Very Hard | |
| RG1 | Reading | 306 ppm | Very Hard | |
| RG29 | Hook | 302 ppm | Very Hard | |
| RG28 | Whitchurch | 301 ppm | Very Hard | |
| RG27 | Hook | 300 ppm | Hard | |
| RG26 | Tadley | 299 ppm | Hard | |
| RG25 | Basingstoke | 298 ppm | Hard | |
| RG24 | Basingstoke | 297 ppm | Hard | |
| RG23 | Basingstoke | 296 ppm | Hard | |
| RG22 | Basingstoke | 295 ppm | Hard | |
| RG21 | Basingstoke | 294 ppm | Hard | |
| RG20 | Newbury | 293 ppm | Hard | |
| RG19 | Thatcham | 269 ppm | Hard | |
| RG18 | Thatcham | 268 ppm | Hard | |
| RG17 | Hungerford | 267 ppm | Hard | |
| RG14 | Newbury | 264 ppm | Hard | |
| RG45 | Crowthorne | 263 ppm | Hard | |
| RG12 | Bracknell | 262 ppm | Hard | |
| RG10 | Reading | 260 ppm | Hard | |
| RG42 | Bracknell | 260 ppm | Hard | |
| RG41 | Wokingham | 259 ppm | Hard | |
| RG40 | Wokingham | 258 ppm | Hard | |
| SL9 | Gerrards Cross | 255 ppm | Hard | |
| SL8 | Bourne End | 254 ppm | Hard | |
| SL7 | Marlow | 253 ppm | Hard | |
| SL6 | Maidenhead | 252 ppm | Hard | |
| SL5 | Ascot | 251 ppm | Hard | |
| SL4 | Windsor | 250 ppm | Hard |
Recommended Products for Berkshire
Top picks for households in hard water areas across Berkshire.
Water2Buy W2B200 Water Softener
From ~£400Best-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 AmazonPhilips AWP1775 Shower Filter
From ~£30Instant 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 AmazonHard Water Guides
Learn more about water hardness and how to manage it.
All counties in South East • Hardest water areas • Softest water areas • Hard water solutions
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