Thames Water
This number is listed by Thames Water on its own website (Billing, account, payments, moving home and water meter enquiries).
- Hours:
- Monday to Friday 8am to 8pm, Saturday 8am to 6pm
Source: “Call us Monday to Friday 8am-8pm, and Saturday 8am-6pm. 0800 980 8800” (opens in a new tab). Checked 13 October 2026.
This could still be a scam call
Criminals can make their number look like a genuine one (this is called spoofing). If someone calls from this number and asks for money, bank details, a code or passwords, hang up. Then call Thames Water back on a number you've found yourself, such as the one on their own website or on a letter or bill from them.