Water or wastewater services complaints
If your complaint is relating to your waste or wastewater, you can either call, email or write to us. We may be able to resolve your complaint over the phone.
For wastewater complaints, please check your bill to see who provides your wastewater. If it's not with us, you'll need to get in touch with the provider.
You can call us on 0800 316 9800 seven days a week and 24 hours a day.
You can contact us by email and we'll be in touch within 10 working days.
Write to us
Send us a letter to: Thames Water, PO Box 436, Swindon, SN38 1TU. Please include your name, address, account number, phone number and the best time to contact you. We'll be in touch via phone or letter within 10 working days of receiving your complaint.