Wessex Water Hardness: 150-300 ppm by Postcode (2026)

Average hardness	231 ppm (Hard)
Hardness range	150 to 291 ppm
Classification	Hard
Districts served	123
Region	South West England

About Wessex Water

Wessex Water provides water to 1.3 million customers across Bath, Bristol and surrounding areas. The Jurassic limestone and chalk geology of the region produces moderately hard to hard water.

At 231 ppm on average, Wessex Water ranks as hard water. See how it compares across the UK in our 50 hardest water areas ranking.

Worth reading: our water softener guide compares the options for Wessex Water customers, and our limescale removal guide has quick fixes for kettles, taps, and boilers.

Cross-check this against Wessex Water's own data: Wessex Water water hardness report. Read the hardness and limescale guidance here, then use the postcode checker to see your local hardness value.

Wessex Water vs Other UK Water Companies

Average hardness across the 15 largest UK water suppliers, hardest first. Your supplier is highlighted.

Rank	Water company	Avg ppm	Classification	Districts
1	Anglian Water	321 ppm	Very Hard	261
2	Thames Water	302 ppm	Very Hard	412
3	South East Water	297 ppm	Hard	17
4	Affinity Water	268 ppm	Hard	32
5	Southern Water	263 ppm	Hard	131
6	Portsmouth Water	261 ppm	Hard	34
7	SES Water	239 ppm	Hard	7
8	Wessex Water	231 ppm	Hard	123
9	Severn Trent Water	222 ppm	Hard	345
10	Yorkshire Water	215 ppm	Hard	217
11	Northumbrian Water	101 ppm	Slightly Hard	122
12	South West Water	80 ppm	Slightly Hard	129
13	United Utilities	77 ppm	Slightly Hard	242
14	Welsh Water (Dwr Cymru)	68 ppm	Slightly Hard	214
15	Scottish Water	54 ppm	Soft	3

Areas Served by Wessex Water

Every postcode district, sorted by hardness.

Postcode	Town	Hardness	PPM	Level
BA9	Wincanton	291	291 ppm	Hard
BA8	Templecombe	290	290 ppm	Hard
BA7	Castle Cary	289	289 ppm	Hard
BA6	Glastonbury	288	288 ppm	Hard
BA5	Wells	287	287 ppm	Hard
BA4	Shepton Mallet	286	286 ppm	Hard
BA3	Radstock	285	285 ppm	Hard
BA2	Bath	284	284 ppm	Hard
BS49	Bristol	284	284 ppm	Hard
BA1	Bath	283	283 ppm	Hard
BS48	Bristol	283	283 ppm	Hard
GL20	Tewkesbury	282	282 ppm	Hard
BS9	Bristol	281	281 ppm	Hard
BS8	Bristol	280	280 ppm	Hard
BS7	Bristol	279	279 ppm	Hard
BS6	Bristol	278	278 ppm	Hard
BS5	Bristol	277	277 ppm	Hard
BS4	Bristol	276	276 ppm	Hard
BS41	Bristol	276	276 ppm	Hard
BS3	Bristol	275	275 ppm	Hard
BS40	Bristol	275	275 ppm	Hard
BS2	Bristol	274	274 ppm	Hard
BS1	Bristol	273	273 ppm	Hard
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
GL19	Gloucester	258	258 ppm	Hard
GL18	Newent	257	257 ppm	Hard
GL17	Mitcheldean	256	256 ppm	Hard
GL16	Coleford	255	255 ppm	Hard
GL15	Lydney	254	254 ppm	Hard
GL14	Cinderford	253	253 ppm	Hard
GL13	Berkeley	252	252 ppm	Hard
BS39	Bristol	251	251 ppm	Hard
GL12	Wotton Under Edge	251	251 ppm	Hard
GL11	Dursley	250	250 ppm	Hard
BS37	Bristol	249	249 ppm	Hard
GL10	Stonehouse	249	249 ppm	Hard
BS36	Bristol	248	248 ppm	Hard
BS35	Bristol	247	247 ppm	Hard
BS34	Bristol	246	246 ppm	Hard
BS32	Bristol	244	244 ppm	Hard
BS31	Bristol	243	243 ppm	Hard
BS30	Bristol	242	242 ppm	Hard
BA22	Yeovil	239	239 ppm	Hard
BA21	Yeovil	238	238 ppm	Hard
BA20	Yeovil	237	237 ppm	Hard
GL56	Moreton In Marsh	236	236 ppm	Hard
GL55	Chipping Campden	235	235 ppm	Hard
GL54	Cheltenham	234	234 ppm	Hard
GL53	Cheltenham	233	233 ppm	Hard
GL52	Cheltenham	232	232 ppm	Hard
GL51	Cheltenham	231	231 ppm	Hard
GL50	Cheltenham	230	230 ppm	Hard
DT9	Sherborne	227	227 ppm	Hard
DT8	Beaminster	226	226 ppm	Hard
DT7	Lyme Regis	225	225 ppm	Hard
DT6	Bridport	224	224 ppm	Hard
DT5	Portland	223	223 ppm	Hard
DT4	Weymouth	222	222 ppm	Hard
DT3	Weymouth	221	221 ppm	Hard
DT2	Dorchester	220	220 ppm	Hard
DT1	Dorchester	219	219 ppm	Hard
BS29	Banwell	218	218 ppm	Hard
BS28	Wedmore	217	217 ppm	Hard
BS27	Cheddar	216	216 ppm	Hard
BS26	Axbridge	215	215 ppm	Hard
SP11	Andover	215	215 ppm	Hard
BS25	Winscombe	214	214 ppm	Hard
SP10	Andover	214	214 ppm	Hard
BS24	Weston Super Mare	213	213 ppm	Hard
BS23	Weston Super Mare	212	212 ppm	Hard
BS22	Weston Super Mare	211	211 ppm	Hard
BA16	Street	210	210 ppm	Hard
BS21	Clevedon	210	210 ppm	Hard
GL9	Badminton	210	210 ppm	Hard
BA15	Bradford On Avon	209	209 ppm	Hard
BS20	Bristol	209	209 ppm	Hard
GL8	Tetbury	209	209 ppm	Hard
BA14	Trowbridge	208	208 ppm	Hard
GL7	Cirencester	208	208 ppm	Hard
BA13	Westbury	207	207 ppm	Hard
DT11	Blandford Forum	207	207 ppm	Hard
GL6	Stroud	207	207 ppm	Hard
SN9	Pewsey	207	207 ppm	Hard
BA12	Warminster	206	206 ppm	Hard
DT10	Sturminster Newton	206	206 ppm	Hard
GL5	Stroud	206	206 ppm	Hard
SN8	Marlborough	206	206 ppm	Hard
BA11	Frome	205	205 ppm	Hard
GL4	Gloucester	205	205 ppm	Hard
SN7	Faringdon	205	205 ppm	Hard
BA10	Bruton	204	204 ppm	Hard
GL3	Gloucester	204	204 ppm	Hard
SN6	Swindon	204	204 ppm	Hard
GL2	Gloucester	203	203 ppm	Hard
SN5	Swindon	203	203 ppm	Hard
GL1	Gloucester	202	202 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
BS16	Bristol	182	182 ppm	Hard
BS15	Bristol	181	181 ppm	Hard
BS14	Bristol	180	180 ppm	Moderately Hard
BS13	Bristol	179	179 ppm	Moderately Hard
BS11	Bristol	177	177 ppm	Moderately Hard
BS10	Bristol	176	176 ppm	Moderately 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

Products for Wessex Water Customers

Popular choices for households on hard water.

Splendid Twin Tank Water Softener

From ~£400

Twin-tank electric softener sized for 1 to 7 bedroom homes. Removes limescale from pipes, boilers, and appliances and delivers continuous soft water, with metered regeneration to keep salt use low.

View on Amazon

Philips Shower Filter

From ~£30

A quick, affordable upgrade. Reduces chlorine and limescale at the showerhead, fits any standard UK shower hose in minutes. Protects skin and hair from hard water damage.

View on Amazon

Common questions about Wessex Water water hardness

How do I check Wessex Water hardness by postcode?

Enter your postcode in the checker on the WaterHard.uk homepage, or find your district in the table above. Wessex Water serves 123 postcode districts across South West England, ranging from 150 to 291 ppm.

Is there a Wessex Water hardness checker or map?

Wessex Water publishes water quality data by postcode, but it can be scattered across PDF reports. WaterHard.uk compiles it into the searchable table above so you can find your district's reading in one place.

How hard is Wessex Water water in my area?

It depends on your exact postcode. Wessex Water supplies range from 150 ppm to 291 ppm, averaging 231 ppm (hard) across 123 postcode districts in South West England. Use the table above to find your specific district.

Do I need a water softener with Wessex Water?

At 231 ppm (hard), many households on Wessex Water notice limescale in kettles and showerheads within weeks. A shower filter is the cheapest first step; a whole-house softener gives the most complete protection. See our water softener guide for a full comparison.

Wessex Water Hardness

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Wessex Water Water Hardness Summary