South West · County

Water hardness in Wiltshire

Average 211 ppm across 29 postcodes and 2 towns.

  • Range 150–273 ppm
  • Towns 2
  • Suppliers Wessex Water
County average
211
ppm CaCO₃
Hard
Soft
Moderate
Hard
Very hard
0100200300400+
211
Avg ppm
150
Min ppm
273
Max ppm
29
Postcodes

Water Hardness Across Wiltshire

The average water hardness in Wiltshire is 211 ppm, classified as hard. Across 29 postcode districts in the South West region, hardness ranges from 150 ppm to 273 ppm.

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

By town

Towns in Wiltshire

Sorted by hardness — tap a town for full details.

Town Hardness PPM Level
Salisbury
259
259 ppm Hard
Swindon
182
182 ppm Hard
Suppliers

Water Companies in Wiltshire

Companies supplying water to this county.

Wessex Water

231 ppm Hard
All postcodes

Postcodes in Wiltshire

Every postcode district in the county, sorted by hardness.

Postcode Town Hardness PPM Level
SP9 Tidworth
273
273 ppm Hard
SP8 Gillingham
272
272 ppm Hard
SP7 Shaftesbury
271
271 ppm Hard
SP6 Fordingbridge
270
270 ppm Hard
SP5 Salisbury
269
269 ppm Hard
SP4 Salisbury
268
268 ppm Hard
SP3 Salisbury
267
267 ppm Hard
SP2 Salisbury
266
266 ppm Hard
SP1 Salisbury
265
265 ppm Hard
SP11 Andover
215
215 ppm Hard
SP10 Andover
214
214 ppm Hard
SN9 Pewsey
207
207 ppm Hard
SN8 Marlborough
206
206 ppm Hard
SN7 Faringdon
205
205 ppm Hard
SN6 Swindon
204
204 ppm Hard
SN5 Swindon
203
203 ppm Hard
SN4 Swindon
202
202 ppm Hard
SN3 Swindon
201
201 ppm Hard
SN2 Swindon
200
200 ppm Hard
SN1 Swindon
199
199 ppm Hard
SN26 Swindon
189
189 ppm Hard
SN25 Swindon
188
188 ppm Hard
SN16 Malmesbury
156
156 ppm Moderately Hard
SN15 Chippenham
155
155 ppm Moderately Hard
SN14 Chippenham
154
154 ppm Moderately Hard
SN13 Corsham
153
153 ppm Moderately Hard
SN12 Melksham
152
152 ppm Moderately Hard
SN11 Calne
151
151 ppm Moderately Hard
SN10 Devizes
150
150 ppm Moderately Hard
Recommended

Products for Wiltshire

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 West · Hardest water areas · Softest water areas · Hard water solutions

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