
Reserved capacity charges for standby supplies
If you have access to your own supplies of water, such as from a borehole or an onsite effluent treatment plant, you may only require water as a back-up if your own supplies fail.
How reserved capacity charges are calculated
Generally water companies charge for stand-by supplies as follows:
- a volume-related charge (pence per m3), that applies to the volume of water reserved by customers over the whole year (possibly split between peak and off-peak seasons); or
- a specific reserved capacity charge (£ per megalitre per day), based on your maximum daily demand
Customers who require back-up supplies will have particular cost characteristics and may require a dedicated suite of reserved capacity or stand by charges.
Companies that offer this tariff
Six companies currently offer standard reserved capacity charges. Other companies may be willing to offer reserved capacity charges by special agreement.
Severn Trent Water and Yorkshire Water calculate their reserved capacity charges by applying a volumetric charge to the volume a customer reserves. Anglian Water, Bournemouth & West Hampshire Water, United Utilities and Wessex Water base their charge on a customer’s maximum daily demand, like a subscribed demand tariff.
Your can find out more in your company’s charges scheme.

