Water for business customers
Our dedicated hub offers you everything you need to know as an SES Business Water customer.
Do we supply your water?
To find out if we are your water supplier, simply enter your postcode.
If you cannot find your address please contact us.
Check if you’re an SES Business Water customer
Most businesses in England have been able to choose which company (known as a retailer) supplies their water services since 2017. If you were a SES Water business customer and have not switched your retail service provider, you will now be served by SES Business Water. Details on how to contact your retailer can be found on the Open Water website.
Wholesale Service Desk
We have a Wholesale Service Desk dedicated to liaising with retailers. We aim to deliver excellent customer service to both business customers and retailers and will manage the communication of planned and unplanned work to ensure retailers are kept informed.
Our team also supports retailers to establish contracts and offer ongoing support throughout the contract period. They offer advice on internal processes, conducting periodic performance reviews, escalating issues when required and recommending improvement initiatives. The team can also advise on the additional services we offer such as meter reading or obtaining meter data from loggers.
Charges and billing
All charges, both primary and non-primary, are published in our Wholesale Charges 2025-26 document. This includes charge rates and any specific conditions associated with our service. Invoicing for water supplied will be in accordance with the market settlement reports which are based on our wholesale charges. Invoice queries should be directed to the contact shown on the invoice. Escalations of invoice queries will be handled by the account manager.
Minimum standards of service
Water and wastewater customers are entitled to guaranteed minimum standards of service, as laid down by the UK Government in England and the Welsh Government in Wales. These rights are known as the guaranteed standards scheme (GSS). Where a retailer or wholesaler fails to meet any of these standards of service then it is required to make a specified payment to the affected customer.
Forms
Please use the retailer forms available on the MOSL website.
Leaks
The below provides information on how to spot a leak, what to do if you find a leak on your non household premises, as well as details of our leakage policy for retailers and non-household customers.
How do we work with retailers?
We help retailers support their business customers.
We have regular meetings and account management support with retailers, however our Wholesale Service Desk team is available to contact if you need any extra support using the contact details below.
Contact us
The Wholesale Service Desk is available Monday to Thursday from 8am to 5pm and on Friday from 8am to 4:30pm.
wholesaleservicedesk@seswater.co.uk
Call 0203 968 9805 during working hours and use 01737 772000 for emergency issues.
2026/2027 charges assurance and useful information documents
Good practice
The Retailer Wholesaler Group (RWG) is a group made up of wholesalers, retailers, the non-household market operator (MOSL), Ofwat, and CC Water. The group works towards improving overall customer service in the market by putting together good practice guides. These guides address operational issues, and you can find copies of the RWG good practice guides on the MOSL website.
Credit agreements
Loss of profit claims
Please visit our loss of profit page here for more information.