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Water Company by Post Code

Below is handy list showing Water Companies by the First Few Letters of your Post Code. If you are in a rush just use "CTRL + F" keys on keyboard to search this page in you browser. And you should be done in no time. We use this list when trying to find out which Company we need to contact for Capacity Enquiries or Asset Plans, for Surface Water Management Plans and the likes. This page contains a large table, and may not be very easy to view of devices with small screens.

Post Code Area Water Company Extra Detail
AL1-AL10 St Albans Affinity Water AL1-AL10
B Birmingham Severn Trent  
BA1-22 Bath Wessex  
BA3-5, BA11 Bath Bristol  
BB Blackburn United Utilities  
BD Bradford Yorkshire  
BH1-4, BH17-18, BH21-31 Bournemouth Bournemouth & West Hampshire  
BH15-16, BH19-20 Bournemouth Wessex  
BL Bolton United Utilities  
BN1-BN44 Brighton Southern  
BN8-10, BN20-27 Brighton South East  
BR1-8 Bromley Thames Water
BS1-49 Bristol Bristol  
CA Carlisle United Utilities  
CB1-4, CB10-11 Cambridge Affinity Water CB11 Thames and Anglian
CB5-9 Cambridge Anglian  
CF Cardiff Welsh Water  
CH Chester Affinity Water  
CM0-6, CM8-15 Chelmsford Essex & Suffolk CM1, CM4, CM13-14, CM16
CM16 Chelmsford Thames Water CM16
CM5-6, CM16-24 Chelmsford Affinity Water CM5-6, CM16-24
CM77 Chelmsford Anglian  
CM7-8 Chelmsford Anglian  
CO7, CO11-16 Colchester Affinity Water  
CR0, CR2, CR4, CR7, CR9 Croydon Thames Water CR0, CR2, CR4, CR7, CR9
CO3 Colchester  Anglian  
CR2, CR3, CR5, CR6,CR8 Croydon Sutton & East Surrey CR2, CR3, CR5, CR6, CR8
Ct15-21 Canterbury Affinity Water  
CT3, CT7-14 Canterbury Southern  
CT4-6 Canterbury Mid Kent  
CV1-CV37 Coventry Severn Trent  
CW Crewe United Utilities  
DA1-11, DA13-18 Dartford Thames Water DA1-9, DA13-18
DA3,DA4,DA11-13 Dartford Southern DA10
DE Derby Severn Trent  
DH Durham Northumbrian  
DL1-5, DL12-17 Darlington Northumbrian  
DL6-11 Darlington Yorkshire  
DN10, DN15-40 Doncaster Anglian  
DN1-9, DN11-14 Doncaster Yorkshire  
DT Doncaster Wessex  
DY Dudley Severn Trent  
E London Thames Water E
EC London Thames Water EC
EN1-4 Enfield Thames Water EN1-4
EN4-6 Enfield Affinity Water EN4-6
EN7-11 Enfield Thames Water EN7-11
EX Exeter South East  
FY Blackpool United Utilities  
GL1-6, GL8-53 Gloucester Bristol  
GL1-GL6 Gloucester Severn Trent  
GL7, GL54-GL56 Gloucester Thames Water GL7, GL54, GL56
GL9-11, GL13-53 Gloucester Severn Trent  
GU1, GU3 Guildford South East GU3
GU1-8, GU27 Guildford Thames Water GU1-GU8, GU27
GU18-24 Guildford Affinity Water GU18-24
GU20-23 Guildford South East GU20-23
GU25-47 Guildford South East GU25-27, GU30-35
GU27-29,GU31,GU33 Guildford Southern  
GU51-52 Guildford South east GU51-52
GU9-17 Guildford South East GU10-13, GU15-17
HA0-9 Harrow Affinity Water HA0-9
HD Huddersfield Yorkshire  
HG Harrogate Yorkshire  
HP1-2, HP24-26 Hemel Hempstead Affinity Water HP1-2, HP24-26
HP27 Hemel Hempstead Thames Water HP27
HP3-14, HP15-23 Hemel Hempstead Thames Water HP3-14, HP15-23
HR 1-9 Hereford Dwr Cymru  
HR1-9 Hereford Severn Trent  
HU Hull Yorkshire  
HX Halifax Yorkshire  
IG1, IG4-11 Ilford Thames Water IG1, IG4-11
IG1-3, IG6, IG11 Ilford Essex & Suffolk IG1-3, IG6, IG11
IP1-12,IP14,IP20,IP22,IP24-33 Ipswich Anglian  
IP15-21, IP23 Ipswich Essex & Suffolk  
KT10-16 Kingston-upon Thames Affinity Water KT10,12-16
KT1-3 KT5-10, KT12 Kingston –upon Thames Thames Water KT1-10, KT12
KT18-19 Kingston-upon Thames Thames Water KT18-19
KT21-24 Kingston-upon Thames Affinity Water KT21-24
KT4, KT10-11, KT14,KT17-22 Kingston-upon Thames Sutton & East Surrey KT10,KT14,KT17-22
L Liverpool United Utilities  
LA Lancaster United Utilities  
LE Leicester Severn Trent  
LL1-10,LL15-78 North Wales Welsh Water  
LL11-14 North Wales Dee Valley  
LN Lincoln Anglian  
LS Leeds Yorkshire  
LU1-6 Luton Affinity Water LU1-6
LU5, LU7 Luton Anglian LU7
M Manchester United Utilities  
ME1-12 Medway Southern  
ME9-10, ME13-20 Medway Mid-Kent  
MK1-17, MK19-46 Milton Keynes Anglian  
MK18 Milton Keynes Thames Water/Anglian MK18
N1,N4-11,N13-19,N21-22 London Thames Water N1, N4-11, N13-19,N21-22
N2-3, N11-12,N20 London Affinity Water N2-3, N11-12, N20
NE Newcastle-upon Tyne Northumbrian  
NG1-30 Nottingham Severn Trent  
NG31-34 Nottingham Anglian  
NN Northampton Anglian NN11-13
NP Newport Welsh Water  
NR1-29, NR35 Norwich Anglian  
NR30-34 Norwich Essex & Suffolk  
NW1-6, NW8, London Thames Water NW1-6, NW8, NW10-11
NW7, NW9-11 London Affinity Water NW7, NW9-11
OL Oldham United Utilities  
OX1-44, OX49 Oxford Thames Water OX1-44, OX49
OX15, OX17 Oxford Severn Trent OX15, OX17
OX6, OX16-17,OX33-44 Oxford Anglian OX6, OX16-17,OX33-44
PE Peterborough Anglian  
PL Plymouth South West  
PO1-29 Portsmouth Portsmouth  
PO30-41 Portsmouth Southern  
PR Preston United Utilities  
RG10, RG12,RG21-29, RG40-42 Reading South East RG10, RG12,RG21-29, RG40-42
RG1-11, RG13-20,RG30-39 Reading Thames Water RG1-11, RG13-20,RG30-39
RG28 Reading Southern  
RH10-17, RH20 Redhill Southern RH10-17, RH20
RH1-11, RH15-19 Redhill South East RH1-11, RH15-19
RH1-9, RH11 Redhill Sutton & East Surrey RH1-9, RH11
RM1-20 Romford Essex & Suffolk RM1-15
S1-79 Sheffield Yorkshire  
S4-45, S80-81 Sheffield Severn Trent  
SA Swansea Welsh Water  
SE London Thames Water SE
SG1-19 Stevenage Affinity Water SG1-19
SK Stockport United Utilities  
SL0, SL5, SL9-10 Slough Affinity Water SL0, SL5, SL9-10
SL1-4 Slough Thames Water/ Affinity SL1-4
SL6 Slough South East SL6
SL7-8 Slough Thames Water SL7-8
SM1-3, SM5-7 Slough Sutton & East SM1-3, SM5-7
SM4 Slough Thames Water/Sutton & East Surrey SM4
SN1-8, SN25-26 Swindon Thames Water SN1-3, SN 5-8, SN25-26
SN9-16 Swindon Wessex water SN9-16, SN4
SO1-53 Southampton Southern  
SO30-32 Southampton Portsmouth  
SP1 - SP11 See Tidworth Street Search in the CIN File    
SR Sunderland Northumbrian  
SS Southend-on-Sea Essex & Suffolk  
ST Stoke-on-Trent Severn Trent  
SW London Thames Water SW
SW19-20 London Sutton & East SW19-20
SY1-17, SY19-22 Shrewsbury Severn Trent  
SY18, SY23-25 Shrewsbury Dwr Cymru  
TA Taunton Wessex  
TF Telford Severn Trent  
TN1-13, TN15,TN17-40 Tonbridge South East TN13,TN15,
TN14, TN16 Tonbridge Thames Water TN14, TN16
TN28, TN29 Tonbridge Affinity Water  
TN31, TN34-38 Tonbridge Southern TN8,
TQ Torquay South West  
TR Truro South West  
TS Middlesborough Northumbrian  
TW1-5, TW7-13, TW16-17 Twickenham Thames Water TW1-5, TW7-13,TW16-17
TW6, TW13-20 Twickenham Affinity Water TW6, TW13-20
UB1-11 Uxbridge Affinity Water UB1-11
UB2, UB6, UB9 Uxbridge Thames Water UB2, UB6, UB9
W London Thames Water W
WA1-5, WA7-16 Warrington United Utilities  
WA6 Warrington United Utilities  
WC London Thames Water WC
WD1-25 Watford Affinity Water WD1-25
WF Wakefield Yorkshire  
WN Wigan United Utilities  
WR Worcester Severn Trent  
WS Walsall South Staffs  
WV Wolverhampton Severn Trent  
YO York Yorkshire