Water Hardness in Kent

Water Hardness Across Kent

The average water hardness in Kent is 246 ppm, classified as hard. Across 81 postcode districts in the South East region, hardness ranges from 200 ppm to 350 ppm.

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

By town

Towns in Kent

Sorted by hardness — tap a town for full details.

Town	Hardness	PPM	Level
Canterbury	255	255 ppm	Hard
Tunbridge Wells	253	253 ppm	Hard
Rochester	223	223 ppm	Hard

Suppliers

Water Companies in Kent

Companies supplying water to this county.

Southern Water

263 ppm Hard

All postcodes

Postcodes in Kent

Every postcode district in the county, sorted by hardness.

Postcode	Town	Hardness	PPM	Level
TN10	Tonbridge	350	350 ppm	Very Hard
TN40	Bexhill On Sea	298	298 ppm	Hard
CT21	Hythe	291	291 ppm	Hard
CT20	Folkestone	290	290 ppm	Hard
TN9	Tonbridge	289	289 ppm	Hard
TN8	Edenbridge	288	288 ppm	Hard
TN7	Hartfield	287	287 ppm	Hard
TN6	Crowborough	286	286 ppm	Hard
TN5	Wadhurst	285	285 ppm	Hard
TN4	Tunbridge Wells	284	284 ppm	Hard
TN3	Tunbridge Wells	283	283 ppm	Hard
TN2	Tunbridge Wells	282	282 ppm	Hard
TN1	Tunbridge Wells	281	281 ppm	Hard
TN39	Bexhill On Sea	274	274 ppm	Hard
TN38	St Leonards On Sea	273	273 ppm	Hard
TN37	St Leonards On Sea	272	272 ppm	Hard
TN36	Winchelsea	271	271 ppm	Hard
TN35	Hastings	270	270 ppm	Hard
TN34	Hastings	269	269 ppm	Hard
TN33	Battle	268	268 ppm	Hard
TN32	Robertsbridge	267	267 ppm	Hard
CT19	Folkestone	266	266 ppm	Hard
TN31	Rye	266	266 ppm	Hard
CT18	Folkestone	265	265 ppm	Hard
TN30	Tenterden	265	265 ppm	Hard
CT17	Dover	264	264 ppm	Hard
CT16	Dover	263	263 ppm	Hard
CT15	Dover	262	262 ppm	Hard
CT14	Deal	261	261 ppm	Hard
CT13	Sandwich	260	260 ppm	Hard
CT12	Ramsgate	259	259 ppm	Hard
CT11	Ramsgate	258	258 ppm	Hard
CT10	Broadstairs	257	257 ppm	Hard
ME20	Aylesford	253	253 ppm	Hard
CT9	Margate	245	245 ppm	Hard
CT8	Westgate On Sea	244	244 ppm	Hard
CT7	Birchington	243	243 ppm	Hard
CT6	Herne Bay	242	242 ppm	Hard
CT5	Whitstable	241	241 ppm	Hard
TN29	Romney Marsh	241	241 ppm	Hard
CT4	Canterbury	240	240 ppm	Hard
TN28	New Romney	240	240 ppm	Hard
CT3	Canterbury	239	239 ppm	Hard
TN27	Ashford	239	239 ppm	Hard
CT2	Canterbury	238	238 ppm	Hard
TN26	Ashford	238	238 ppm	Hard
CT1	Canterbury	237	237 ppm	Hard
TN25	Ashford	237	237 ppm	Hard
TN24	Ashford	236	236 ppm	Hard
TN23	Ashford	235	235 ppm	Hard
TN22	Uckfield	234	234 ppm	Hard
TN21	Heathfield	233	233 ppm	Hard
TN20	Mayfield	232	232 ppm	Hard
ME19	West Malling	229	229 ppm	Hard
ME18	Maidstone	228	228 ppm	Hard
ME17	Maidstone	227	227 ppm	Hard
ME16	Maidstone	226	226 ppm	Hard
ME15	Maidstone	225	225 ppm	Hard
ME14	Maidstone	224	224 ppm	Hard
ME13	Faversham	223	223 ppm	Hard
ME12	Sheerness	222	222 ppm	Hard
ME11	Queenborough	221	221 ppm	Hard
ME9	Sittingbourne	221	221 ppm	Hard
ME10	Sittingbourne	220	220 ppm	Hard
ME8	Gillingham	220	220 ppm	Hard
ME7	Gillingham	219	219 ppm	Hard
ME6	Snodland	218	218 ppm	Hard
ME5	Chatham	217	217 ppm	Hard
ME4	Chatham	216	216 ppm	Hard
ME3	Rochester	215	215 ppm	Hard
ME2	Rochester	214	214 ppm	Hard
ME1	Rochester	213	213 ppm	Hard
TN19	Etchingham	208	208 ppm	Hard
TN18	Cranbrook	207	207 ppm	Hard
TN17	Cranbrook	206	206 ppm	Hard
TN16	Westerham	205	205 ppm	Hard
TN15	Sevenoaks	204	204 ppm	Hard
TN14	Sevenoaks	203	203 ppm	Hard
TN13	Sevenoaks	202	202 ppm	Hard
TN12	Tonbridge	201	201 ppm	Hard
TN11	Tonbridge	200	200 ppm	Hard

Recommended

Products for Kent

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.