Water Hardness in Surrey

Water Hardness Across Surrey

The average water hardness in Surrey is 305 ppm, classified as very hard. Across 58 postcode districts in the South East region, hardness ranges from 262 ppm to 344 ppm.

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

By town

Towns in Surrey

Sorted by hardness — tap a town for full details.

Town	Hardness	PPM	Level
Redhill	321	321 ppm	Very Hard
Guildford	296	296 ppm	Hard

Suppliers

Water Companies in Surrey

Companies supplying water to this county.

Southern Water

263 ppm Hard

Thames Water

302 ppm Very Hard

All postcodes

Postcodes in Surrey

Every postcode district in the county, sorted by hardness.

Postcode	Town	Hardness	PPM	Level
RH20	Pulborough	344	344 ppm	Very Hard
GU35	Bordon	333	333 ppm	Very Hard
GU34	Alton	332	332 ppm	Very Hard
GU33	Liss	331	331 ppm	Very Hard
GU32	Petersfield	330	330 ppm	Very Hard
GU31	Petersfield	329	329 ppm	Very Hard
RH9	Godstone	329	329 ppm	Very Hard
GU30	Liphook	328	328 ppm	Very Hard
RH8	Oxted	328	328 ppm	Very Hard
RH7	Lingfield	327	327 ppm	Very Hard
RH6	Horley	326	326 ppm	Very Hard
RH5	Dorking	325	325 ppm	Very Hard
RH4	Dorking	324	324 ppm	Very Hard
RH3	Betchworth	323	323 ppm	Very Hard
RH2	Reigate	322	322 ppm	Very Hard
RH1	Redhill	321	321 ppm	Very Hard
RH19	East Grinstead	320	320 ppm	Very Hard
RH18	Forest Row	319	319 ppm	Very Hard
RH17	Haywards Heath	318	318 ppm	Very Hard
RH16	Haywards Heath	317	317 ppm	Very Hard
RH15	Burgess Hill	316	316 ppm	Very Hard
RH14	Billingshurst	315	315 ppm	Very Hard
RH13	Horsham	314	314 ppm	Very Hard
RH12	Horsham	313	313 ppm	Very Hard
RH11	Crawley	312	312 ppm	Very Hard
GU9	Farnham	311	311 ppm	Very Hard
RH10	Crawley	311	311 ppm	Very Hard
GU8	Godalming	310	310 ppm	Very Hard
GU7	Godalming	309	309 ppm	Very Hard
GU6	Cranleigh	308	308 ppm	Very Hard
GU5	Guildford	307	307 ppm	Very Hard
GU4	Guildford	306	306 ppm	Very Hard
GU3	Guildford	305	305 ppm	Very Hard
GU2	Guildford	304	304 ppm	Very Hard
GU29	Midhurst	304	304 ppm	Very Hard
GU1	Guildford	303	303 ppm	Very Hard
GU28	Petworth	303	303 ppm	Very Hard
GU27	Haslemere	302	302 ppm	Very Hard
GU26	Hindhead	301	301 ppm	Very Hard
GU25	Virginia Water	300	300 ppm	Hard
GU24	Woking	299	299 ppm	Hard
GU23	Woking	298	298 ppm	Hard
GU22	Woking	297	297 ppm	Hard
GU21	Woking	296	296 ppm	Hard
GU20	Windlesham	295	295 ppm	Hard
GU52	Fleet	295	295 ppm	Hard
GU51	Fleet	294	294 ppm	Hard
GU19	Bagshot	271	271 ppm	Hard
GU18	Lightwater	270	270 ppm	Hard
GU17	Camberley	269	269 ppm	Hard
GU16	Camberley	268	268 ppm	Hard
GU15	Camberley	267	267 ppm	Hard
GU47	Sandhurst	267	267 ppm	Hard
GU14	Farnborough	266	266 ppm	Hard
GU46	Yateley	266	266 ppm	Hard
GU12	Aldershot	264	264 ppm	Hard
GU11	Aldershot	263	263 ppm	Hard
GU10	Farnham	262	262 ppm	Hard

Recommended

Products for Surrey

Top picks for households in very 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.

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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.