Severn Trent Hardness: 222 ppm (Hard)

Average hardness	222 ppm (Hard)
Hardness range	150 to 300 ppm
Classification	Hard
Districts served	345
Region	Midlands

About Severn Trent Water

Severn Trent Water serves around 8 million customers across the Midlands and mid-Wales. Water hardness varies significantly across the region, from soft upland sources to hard groundwater from limestone.

At 222 ppm on average, Severn Trent 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 Severn Trent Water customers, and our limescale removal guide has quick fixes for kettles, taps, and boilers.

Cross-check this against Severn Trent Water's own data: Severn Trent Water water hardness report. Enter your postcode and pick a timeframe to see your area's measured water quality including hardness, with a downloadable PDF report.

Severn Trent 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 Severn Trent Water

Every postcode district, sorted by hardness.

Postcode	Town	Hardness	PPM	Level
NG31	Grantham	300	300 ppm	Hard
WV9	Wolverhampton	297	297 ppm	Hard
WV8	Wolverhampton	296	296 ppm	Hard
WV7	Wolverhampton	295	295 ppm	Hard
WV6	Wolverhampton	294	294 ppm	Hard
WV5	Wolverhampton	293	293 ppm	Hard
WV4	Wolverhampton	292	292 ppm	Hard
WV3	Wolverhampton	291	291 ppm	Hard
LE9	Leicester	290	290 ppm	Hard
WV2	Wolverhampton	290	290 ppm	Hard
LE8	Leicester	289	289 ppm	Hard
WV1	Wolverhampton	289	289 ppm	Hard
LE7	Leicester	288	288 ppm	Hard
B80	Studley	287	287 ppm	Hard
LE6	Leicester	287	287 ppm	Hard
BH19	Swanage	286	286 ppm	Hard
LE5	Leicester	286	286 ppm	Hard
SO45	Southampton	286	286 ppm	Hard
BH18	Broadstone	285	285 ppm	Hard
LE4	Leicester	285	285 ppm	Hard
BH17	Poole	284	284 ppm	Hard
LE3	Leicester	284	284 ppm	Hard
SO43	Lyndhurst	284	284 ppm	Hard
BH16	Poole	283	283 ppm	Hard
DE45	Bakewell	283	283 ppm	Hard
LE2	Leicester	283	283 ppm	Hard
SO42	Brockenhurst	283	283 ppm	Hard
BH15	Poole	282	282 ppm	Hard
LE1	Leicester	282	282 ppm	Hard
SO41	Lymington	282	282 ppm	Hard
B38	Birmingham	281	281 ppm	Hard
BH14	Poole	281	281 ppm	Hard
SO40	Southampton	281	281 ppm	Hard
B37	Birmingham	280	280 ppm	Hard
BH13	Branksome Park	280	280 ppm	Hard
B36	Birmingham	279	279 ppm	Hard
BH12	Poole	279	279 ppm	Hard
WR15	Tenbury Wells	279	279 ppm	Hard
B35	Birmingham	278	278 ppm	Hard
BH11	Bournemouth	278	278 ppm	Hard
WR14	Malvern	278	278 ppm	Hard
B34	Birmingham	277	277 ppm	Hard
BH10	Bournemouth	277	277 ppm	Hard
TF9	Market Drayton	277	277 ppm	Hard
WR13	Malvern	277	277 ppm	Hard
B33	Birmingham	276	276 ppm	Hard
TF8	Telford	276	276 ppm	Hard
WR12	Broadway	276	276 ppm	Hard
B32	Birmingham	275	275 ppm	Hard
TF7	Telford	275	275 ppm	Hard
WR11	Evesham	275	275 ppm	Hard
B31	Birmingham	274	274 ppm	Hard
CV13	Nuneaton	274	274 ppm	Hard
TF6	Telford	274	274 ppm	Hard
WR10	Pershore	274	274 ppm	Hard
B30	Birmingham	273	273 ppm	Hard
CV12	Bedworth	273	273 ppm	Hard
TF5	Telford	273	273 ppm	Hard
CV11	Nuneaton	272	272 ppm	Hard
TF4	Telford	272	272 ppm	Hard
CV10	Nuneaton	271	271 ppm	Hard
NG25	Southwell	271	271 ppm	Hard
TF3	Telford	271	271 ppm	Hard
NG24	Newark	270	270 ppm	Hard
TF2	Telford	270	270 ppm	Hard
NG23	Newark	269	269 ppm	Hard
NG9	Nottingham	269	269 ppm	Hard
TF1	Telford	269	269 ppm	Hard
NG22	Newark	268	268 ppm	Hard
NG8	Nottingham	268	268 ppm	Hard
NG21	Mansfield	267	267 ppm	Hard
NG7	Nottingham	267	267 ppm	Hard
NG20	Mansfield	266	266 ppm	Hard
NG6	Nottingham	266	266 ppm	Hard
NG5	Nottingham	265	265 ppm	Hard
NG4	Nottingham	264	264 ppm	Hard
B79	Tamworth	263	263 ppm	Hard
NG3	Nottingham	263	263 ppm	Hard
B78	Tamworth	262	262 ppm	Hard
NG2	Nottingham	262	262 ppm	Hard
B77	Tamworth	261	261 ppm	Hard
CV9	Atherstone	261	261 ppm	Hard
NG1	Nottingham	261	261 ppm	Hard
B76	Sutton Coldfield	260	260 ppm	Hard
CV8	Kenilworth	260	260 ppm	Hard
B75	Sutton Coldfield	259	259 ppm	Hard
CV7	Coventry	259	259 ppm	Hard
B74	Sutton Coldfield	258	258 ppm	Hard
CV6	Coventry	258	258 ppm	Hard
B73	Sutton Coldfield	257	257 ppm	Hard
CV5	Coventry	257	257 ppm	Hard
WV16	Bridgnorth	257	257 ppm	Hard
B72	Sutton Coldfield	256	256 ppm	Hard
CV4	Coventry	256	256 ppm	Hard
WV15	Bridgnorth	256	256 ppm	Hard
B71	West Bromwich	255	255 ppm	Hard
CV3	Coventry	255	255 ppm	Hard
WV14	Bilston	255	255 ppm	Hard
B70	West Bromwich	254	254 ppm	Hard
CV2	Coventry	254	254 ppm	Hard
ST9	Stoke On Trent	254	254 ppm	Hard
WV13	Willenhall	254	254 ppm	Hard
CV1	Coventry	253	253 ppm	Hard
ST8	Stoke On Trent	253	253 ppm	Hard
WV12	Willenhall	253	253 ppm	Hard
ST7	Stoke On Trent	252	252 ppm	Hard
WV11	Wolverhampton	252	252 ppm	Hard
ST6	Stoke On Trent	251	251 ppm	Hard
WV10	Wolverhampton	251	251 ppm	Hard
SO32	Southampton	250	250 ppm	Hard
ST5	Newcastle	250	250 ppm	Hard
B29	Birmingham	249	249 ppm	Hard
SO31	Southampton	249	249 ppm	Hard
ST4	Stoke On Trent	249	249 ppm	Hard
B28	Birmingham	248	248 ppm	Hard
SO30	Southampton	248	248 ppm	Hard
ST3	Stoke On Trent	248	248 ppm	Hard
B27	Birmingham	247	247 ppm	Hard
ST2	Stoke On Trent	247	247 ppm	Hard
B26	Birmingham	246	246 ppm	Hard
ST1	Stoke On Trent	246	246 ppm	Hard
B25	Birmingham	245	245 ppm	Hard
B24	Birmingham	244	244 ppm	Hard
CA28	Whitehaven	244	244 ppm	Hard
B23	Birmingham	243	243 ppm	Hard
CA27	St Bees	243	243 ppm	Hard
CA26	Frizington	242	242 ppm	Hard
NG19	Mansfield	242	242 ppm	Hard
B21	Birmingham	241	241 ppm	Hard
CA25	Cleator Moor	241	241 ppm	Hard
DY9	Stourbridge	241	241 ppm	Hard
NG18	Mansfield	241	241 ppm	Hard
B20	Birmingham	240	240 ppm	Hard
CA24	Moor Row	240	240 ppm	Hard
DY8	Stourbridge	240	240 ppm	Hard
NG17	Sutton In Ashfield	240	240 ppm	Hard
CA23	Cleator	239	239 ppm	Hard
DY7	Stourbridge	239	239 ppm	Hard
NG16	Nottingham	239	239 ppm	Hard
CA22	Egremont	238	238 ppm	Hard
DY6	Kingswinford	238	238 ppm	Hard
NG15	Nottingham	238	238 ppm	Hard
CA21	Beckermet	237	237 ppm	Hard
DY5	Brierley Hill	237	237 ppm	Hard
NG14	Nottingham	237	237 ppm	Hard
CA20	Seascale	236	236 ppm	Hard
DY4	Tipton	236	236 ppm	Hard
NG13	Nottingham	236	236 ppm	Hard
DY3	Dudley	235	235 ppm	Hard
NG12	Nottingham	235	235 ppm	Hard
DY2	Dudley	234	234 ppm	Hard
NG11	Nottingham	234	234 ppm	Hard
DY1	Dudley	233	233 ppm	Hard
NG10	Nottingham	233	233 ppm	Hard
DE75	Heanor	231	231 ppm	Hard
B69	Oldbury	230	230 ppm	Hard
DE74	Derby	230	230 ppm	Hard
B68	Oldbury	229	229 ppm	Hard
DE73	Derby	229	229 ppm	Hard
B67	Smethwick	228	228 ppm	Hard
DE72	Derby	228	228 ppm	Hard
B66	Smethwick	227	227 ppm	Hard
B65	Rowley Regis	226	226 ppm	Hard
CV47	Southam	226	226 ppm	Hard
B64	Cradley Heath	225	225 ppm	Hard
ST21	Stafford	225	225 ppm	Hard
B63	Halesowen	224	224 ppm	Hard
ST20	Stafford	224	224 ppm	Hard
B62	Halesowen	223	223 ppm	Hard
B61	Bromsgrove	222	222 ppm	Hard
B60	Bromsgrove	221	221 ppm	Hard
BH9	Bournemouth	220	220 ppm	Hard
BH8	Bournemouth	219	219 ppm	Hard
DY14	Kidderminster	219	219 ppm	Hard
SO24	Alresford	219	219 ppm	Hard
BH7	Bournemouth	218	218 ppm	Hard
DY13	Stourport On Severn	218	218 ppm	Hard
SO23	Winchester	218	218 ppm	Hard
BH6	Bournemouth	217	217 ppm	Hard
DY12	Bewdley	217	217 ppm	Hard
SO22	Winchester	217	217 ppm	Hard
B19	Birmingham	216	216 ppm	Hard
BH5	Bournemouth	216	216 ppm	Hard
DE24	Derby	216	216 ppm	Hard
DY11	Kidderminster	216	216 ppm	Hard
SO21	Winchester	216	216 ppm	Hard
B18	Birmingham	215	215 ppm	Hard
BH4	Bournemouth	215	215 ppm	Hard
DE23	Derby	215	215 ppm	Hard
DY10	Kidderminster	215	215 ppm	Hard
SO20	Stockbridge	215	215 ppm	Hard
B17	Birmingham	214	214 ppm	Hard
BH3	Bournemouth	214	214 ppm	Hard
DE22	Derby	214	214 ppm	Hard
B16	Birmingham	213	213 ppm	Hard
BH2	Bournemouth	213	213 ppm	Hard
DE21	Derby	213	213 ppm	Hard
B15	Birmingham	212	212 ppm	Hard
BH1	Bournemouth	212	212 ppm	Hard
CA19	Holmrook	212	212 ppm	Hard
B14	Birmingham	211	211 ppm	Hard
CA18	Ravenglass	211	211 ppm	Hard
B13	Birmingham	210	210 ppm	Hard
CA17	Kirkby Stephen	210	210 ppm	Hard
B12	Birmingham	209	209 ppm	Hard
CA16	Appleby In Westmorland	209	209 ppm	Hard
B11	Birmingham	208	208 ppm	Hard
CA15	Maryport	208	208 ppm	Hard
B10	Birmingham	207	207 ppm	Hard
CA14	Workington	207	207 ppm	Hard
CA13	Cockermouth	206	206 ppm	Hard
CA12	Keswick	205	205 ppm	Hard
CA11	Penrith	204	204 ppm	Hard
CA10	Penrith	203	203 ppm	Hard
ST19	Stafford	200	200 ppm	Hard
ST18	Stafford	199	199 ppm	Hard
DE65	Derby	198	198 ppm	Hard
ST17	Stafford	198	198 ppm	Hard
TF13	Much Wenlock	198	198 ppm	Hard
WS9	Walsall	198	198 ppm	Hard
ST16	Stafford	197	197 ppm	Hard
TF12	Broseley	197	197 ppm	Hard
WS8	Walsall	197	197 ppm	Hard
ST15	Stone	196	196 ppm	Hard
TF11	Shifnal	196	196 ppm	Hard
WS7	Burntwood	196	196 ppm	Hard
ST14	Uttoxeter	195	195 ppm	Hard
TF10	Newport	195	195 ppm	Hard
WS6	Walsall	195	195 ppm	Hard
ST13	Leek	194	194 ppm	Hard
WS5	Walsall	194	194 ppm	Hard
BH31	Verwood	193	193 ppm	Hard
CV37	Stratford Upon Avon	193	193 ppm	Hard
ST12	Stoke On Trent	193	193 ppm	Hard
WS4	Walsall	193	193 ppm	Hard
CV36	Shipston On Stour	192	192 ppm	Hard
LE67	Coalville	192	192 ppm	Hard
ST11	Stoke On Trent	192	192 ppm	Hard
WS3	Walsall	192	192 ppm	Hard
CV35	Warwick	191	191 ppm	Hard
SO19	Southampton	191	191 ppm	Hard
ST10	Stoke On Trent	191	191 ppm	Hard
WS2	Walsall	191	191 ppm	Hard
CV34	Warwick	190	190 ppm	Hard
LE65	Ashby De La Zouch	190	190 ppm	Hard
SO18	Southampton	190	190 ppm	Hard
WS1	Walsall	190	190 ppm	Hard
CV33	Leamington Spa	189	189 ppm	Hard
SO17	Southampton	189	189 ppm	Hard
B50	Alcester	188	188 ppm	Hard
CV32	Leamington Spa	188	188 ppm	Hard
SO16	Southampton	188	188 ppm	Hard
CV31	Leamington Spa	187	187 ppm	Hard
SO15	Southampton	187	187 ppm	Hard
SO14	Southampton	186	186 ppm	Hard
DE15	Burton On Trent	184	184 ppm	Hard
DE14	Burton On Trent	183	183 ppm	Hard
DE7	Ilkeston	183	183 ppm	Hard
DE13	Burton On Trent	182	182 ppm	Hard
DE6	Ashbourne	182	182 ppm	Hard
DE12	Swadlincote	181	181 ppm	Hard
DE5	Ripley	181	181 ppm	Hard
DE11	Swadlincote	180	180 ppm	Moderately Hard
DE4	Matlock	180	180 ppm	Moderately Hard
LE19	Leicester	180	180 ppm	Moderately Hard
DE3	Derby	179	179 ppm	Moderately Hard
LE18	Wigston	179	179 ppm	Moderately Hard
LE17	Lutterworth	178	178 ppm	Moderately Hard
B98	Redditch	177	177 ppm	Moderately Hard
DE1	Derby	177	177 ppm	Moderately Hard
LE16	Market Harborough	177	177 ppm	Moderately Hard
B97	Redditch	176	176 ppm	Moderately Hard
LE15	Oakham	176	176 ppm	Moderately Hard
B96	Redditch	175	175 ppm	Moderately Hard
LE14	Melton Mowbray	175	175 ppm	Moderately Hard
B95	Henley In Arden	174	174 ppm	Moderately Hard
LE13	Melton Mowbray	174	174 ppm	Moderately Hard
B94	Solihull	173	173 ppm	Moderately Hard
LE12	Loughborough	173	173 ppm	Moderately Hard
B9	Birmingham	172	172 ppm	Moderately Hard
B93	Solihull	172	172 ppm	Moderately Hard
CA9	Alston	172	172 ppm	Moderately Hard
LE11	Loughborough	172	172 ppm	Moderately Hard
B8	Birmingham	171	171 ppm	Moderately Hard
B92	Solihull	171	171 ppm	Moderately Hard
CA8	Brampton	171	171 ppm	Moderately Hard
LE10	Hinckley	171	171 ppm	Moderately Hard
B7	Birmingham	170	170 ppm	Moderately Hard
B91	Solihull	170	170 ppm	Moderately Hard
CA7	Wigton	170	170 ppm	Moderately Hard
B6	Birmingham	169	169 ppm	Moderately Hard
B90	Solihull	169	169 ppm	Moderately Hard
CA6	Carlisle	169	169 ppm	Moderately Hard
B5	Birmingham	168	168 ppm	Moderately Hard
CA5	Carlisle	168	168 ppm	Moderately Hard
B4	Birmingham	167	167 ppm	Moderately Hard
CA4	Carlisle	167	167 ppm	Moderately Hard
B3	Birmingham	166	166 ppm	Moderately Hard
CA3	Carlisle	166	166 ppm	Moderately Hard
DE56	Belper	166	166 ppm	Moderately Hard
SO53	Eastleigh	166	166 ppm	Moderately Hard
B2	Birmingham	165	165 ppm	Moderately Hard
CA2	Carlisle	165	165 ppm	Moderately Hard
DE55	Alfreton	165	165 ppm	Moderately Hard
SO52	Southampton	165	165 ppm	Moderately Hard
WR9	Droitwich	165	165 ppm	Moderately Hard
B1	Birmingham	164	164 ppm	Moderately Hard
B49	Alcester	164	164 ppm	Moderately Hard
BH25	New Milton	164	164 ppm	Moderately Hard
CA1	Carlisle	164	164 ppm	Moderately Hard
SO51	Romsey	164	164 ppm	Moderately Hard
WR8	Worcester	164	164 ppm	Moderately Hard
B48	Birmingham	163	163 ppm	Moderately Hard
BH24	Ringwood	163	163 ppm	Moderately Hard
SO50	Eastleigh	163	163 ppm	Moderately Hard
WR7	Worcester	163	163 ppm	Moderately Hard
B47	Birmingham	162	162 ppm	Moderately Hard
BH23	Christchurch	162	162 ppm	Moderately Hard
NG80	Nottingham	162	162 ppm	Moderately Hard
WR6	Worcester	162	162 ppm	Moderately Hard
B46	Birmingham	161	161 ppm	Moderately Hard
BH22	Ferndown	161	161 ppm	Moderately Hard
WR5	Worcester	161	161 ppm	Moderately Hard
B45	Birmingham	160	160 ppm	Moderately Hard
BH21	Wimborne	160	160 ppm	Moderately Hard
WR4	Worcester	160	160 ppm	Moderately Hard
WS15	Rugeley	160	160 ppm	Moderately Hard
B44	Birmingham	159	159 ppm	Moderately Hard
BH20	Wareham	159	159 ppm	Moderately Hard
WR3	Worcester	159	159 ppm	Moderately Hard
WS14	Lichfield	159	159 ppm	Moderately Hard
B43	Birmingham	158	158 ppm	Moderately Hard
WR2	Worcester	158	158 ppm	Moderately Hard
WS13	Lichfield	158	158 ppm	Moderately Hard
B42	Birmingham	157	157 ppm	Moderately Hard
WR1	Worcester	157	157 ppm	Moderately Hard
WS12	Cannock	157	157 ppm	Moderately Hard
CV23	Rugby	156	156 ppm	Moderately Hard
WS11	Cannock	156	156 ppm	Moderately Hard
CV22	Rugby	155	155 ppm	Moderately Hard
WS10	Wednesbury	155	155 ppm	Moderately Hard
CV21	Rugby	154	154 ppm	Moderately Hard
NG34	Sleaford	152	152 ppm	Moderately Hard
NG33	Grantham	151	151 ppm	Moderately Hard
NG32	Grantham	150	150 ppm	Moderately Hard

Products for Severn Trent 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 Severn Trent Water water hardness

How do I check Severn Trent Water hardness by postcode?

Enter your postcode in the checker on the WaterHard.uk homepage, or find your district in the table above. Severn Trent Water serves 345 postcode districts across Midlands, ranging from 150 to 300 ppm.

Is there a Severn Trent Water hardness checker or map?

Severn Trent 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 Severn Trent Water water in my area?

It depends on your exact postcode. Severn Trent Water supplies range from 150 ppm to 300 ppm, averaging 222 ppm (hard) across 345 postcode districts in Midlands. Use the table above to find your specific district.

Do I need a water softener with Severn Trent Water?

At 222 ppm (hard), many households on Severn Trent 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.

Severn Trent Water Hardness

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Severn Trent Water Water Hardness Summary