Code Area name Water hardness
AB Aberdeen Soft to moderately soft
BA Bath Hard to very hard
B Birmingham Soft to moderately soft or medium to moderately hard or hard to very hard
BB Blackburn Soft to moderately soft
FY Blackpool Soft to moderately soft
BL Bolton Soft to moderately soft
BH Bournemouth Hard to very hard
BD Bradford Soft to moderately soft
BN Brighton Hard to very hard
BS Bristol Hard to very hard
BR Bromley Hard to very hard
CB Cambridge Hard to very hard
CT Canterbury Hard to very hard
CF Cardiff Soft to moderately soft
CA Carlisle Soft to moderately soft or hard to very hard
CM Chelmsford Hard to very hard
CH Chester Soft to moderately soft or hard to very hard
TS Cleveland [Teesside] Soft to moderately soft
CO Colchester Hard to very hard
CV Coventry Hard to very hard
CW Crewe Soft to moderately soft
CR Croydon Hard to very hard
DL Darlington Soft to moderately soft
DA Dartford Hard to very hard
DE Derby Soft to moderately soft or hard to very hard
DN Doncaster Hard to very hard
DT Dorchester Hard to very hard
DY Dudley Medium to moderately hard
DG Dumfries & Galloway Soft to moderately soft
DD Dundee Soft to moderately soft
DH Durham Soft to moderately soft
EH Edinburgh Soft to moderately soft
EN Enfield Hard to very hard
EX Exeter Soft to moderately soft
FK Falkirk & Stirling Soft to moderately soft
TD Galashiels Soft to moderately soft
G Glasgow Soft to moderately soft
GL Gloucester Medium to moderately hard
GU Guildford Hard to very hard
HX Halifax Soft to moderately soft
HG Harrogate Soft to moderately soft
HA Harrow Hard to very hard
HP Hemel Hempstead Hard to very hard
HR Hereford Medium to moderately hard
HD Huddersfield Soft to moderately soft
HU Hull Hard to very hard
IG Ilford Hard to very hard
IV Inverness Soft to moderately soft
IP Ipswich Hard to very hard
KA Kilmarnock Soft to moderately soft
KT Kingston upon Thames Hard to very hard
KY Kirkcaldy Soft to moderately soft
KW Kirkwall Soft to moderately soft
LA Lancaster Soft to moderately soft
LS Leeds Soft to moderately soft or hard to very hard
LE Leicester Hard to very hard
LN Lincoln Hard to very hard
L Liverpool Soft to moderately soft
LD Llandrindod Wells Medium to moderately hard
LL Llandudno Medium to moderately hard
E London E Hard to very hard
EC London EC Hard to very hard
N London N Hard to very hard
NW London NW Hard to very hard
SE London SE Hard to very hard
SW London SW Hard to very hard
W London W Hard to very hard
WC London WC Hard to very hard
LU Luton Hard to very hard
M Manchester Soft to moderately soft
ME Medway/Rochester Hard to very hard
MK Milton Keynes Hard to very hard
ML Motherwell Soft to moderately soft
NE Newcastle upon Tyne Hard to very hard
NP Newport Medium to moderately hard
NN Northampton Hard to very hard
BT Northern Ireland Soft to moderately soft
NR Norwich Hard to very hard
NG Nottingham Hard to very hard
OL Oldham Soft to moderately soft
OX Oxford Hard to very hard
PA Paisley Soft to moderately soft
PH Perth Soft to moderately soft
PE Peterborough Hard to very hard
PL Plymouth Soft to moderately soft
PO Portsmouth Hard to very hard
PR Preston Soft to moderately soft
RG Reading Hard to very hard
RH Redhill Medium to moderately hard
RM Romford Hard to very hard
SP Salisbury Hard to very hard
S Sheffield Hard to very hard
SY Shrewsbury Medium to moderately hard
SL Slough Hard to very hard
UB Southall Uxbridge Hard to very hard
SO Southampton Hard to very hard
SS Southend-on-Sea Hard to very hard
AL St Albans Hard to very hard
SG Stevenage Hard to very hard
SK Stockport Soft to moderately soft
ST Stoke-on-Trent Hard to very hard
SR Sunderland Hard to very hard
SM Sutton Hard to very hard
SA Swansea Soft to moderately soft
SN Swindon Hard to very hard
TA Taunton Medium to moderately hard
TF Telford Hard to very hard
TN Tonbridge Hard to very hard
TQ Torquay Soft to moderately soft
TR Truro Soft to moderately soft
TW Twickenham Hard to very hard
WF Wakefield Hard to very hard
WS Walsall Medium to moderately hard
WA Warrington Soft to moderately soft
WD Watford Hard to very hard
WN Wigan Soft to moderately soft
WV Wolverhampton Hard to very hard
WR Worcester Medium to moderately hard
YO York Hard to very hard
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Water hardness is a natural feature and results from the geology of the region, being made up from limestone. Minerals such as calcium and magnesium dissolve into the water as it moves round the ground. This guide should be taken as advisory and if your water hardness search results demonstrate results as Hard to Very Hard or Medium to moderately Hard then contact your local expert shown on the following page for advice Regional Sales team or check out our system efficiency brochure by clicking this link.