Save up to 80% on fixed charges

We're saving UK businesses up to 80% on their business water fixed charges, with more 5-star Trustpilot reviews than all other water retailers combined.

Looking for your balance?

Log in to MyAccount

View and download invoices, check your account balance and latest transactions, submit meter readings, find your meter and see consumption history.
MyAccount has everything you need to manage your account online.
Register for MyAccount

The easiest way to pay your bill is by Direct Debit

Take paying bills off your 'To do' list. Regular Direct Debit payments help to avoid late payment charges and manage cashflow, and you'll be covered by the Direct Debit Guarantee.

Set up your Direct Debit today

Level up your water use

Making a few simple changes to your business will help you to save water, save money and reduce your carbon footprint. Better for you, better for the environment.

Get started with our free Water Efficiency Guide

Water management services

Castle Water’s additional water management services work to support efficiency, reduce costs and mitigate risk. We understand that no two businesses are the same. We can work with you to address the additional water management needs of your business, and provide proactive solutions including Contingency Planning, Water Efficiency Audits, Leak Detection and Repair, and Automatic Meter Reading.

Our Services