Thames Water is the UK's largest water and wastewater services company. British expats often need to contact Thames Water for water service management, billing, and emergency reporting while living overseas.
Dial 0345 920 0800 (within United Kingdom)
011 44 345 920 0800
00 44 345 920 0800
011 44 345 920 0800
0011 44 345 920 0800
With PhoneTheWorld, simply enter +44 345 920 0800 and click call. No access codes needed — we handle everything.
Call early in the morning when lines open for shortest wait times
Have your account number or reference number ready before calling
Avoid calling on Mondays and the day after holidays — these are the busiest
Check thameswater.co.uk first — many questions can be resolved online without calling
Tuesday–Thursday, early morning United Kingdom time
Thames Water website: thameswater.co.uk
Thames Water mobile app or online portal for account management
Email or online contact form via thameswater.co.uk
Yes. From abroad, call +44 345 920 0800. The domestic number (0345 920 0800) only works within United Kingdom. International calling rates apply.
With PhoneTheWorld, calling United Kingdom costs just a few cents per minute. Traditional carriers may charge $1–$3 per minute. PhoneTheWorld is pay-as-you-go with no subscription or connection fees, and credits never expire.
Yes. PhoneTheWorld lets you call any United Kingdom number from your browser — no app or SIM card needed. Just enter +44 345 920 0800 and click call. No app required, pay-as-you-go, credits never expire.
Have your account number, reference number, or any relevant details ready before calling. The representative will need to verify your identity before discussing your account.
The best time to call is Tuesday through Thursday during early morning hours United Kingdom time. Avoid Mondays and the day after holidays, as these have the longest wait times. If calling from Asia or Americas, morning UK time may be afternoon or evening your local time.
Yes. thameswater.co.uk offers online services and information. Check their website for online chat, email support, or a mobile app.
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