Most domestic properties in England and Wales currently have their water and
wastewater charges billed in one of two ways - either as an unmetered charge,
based on the property, usually its former rateable value; or as a metered
(volumetric) charge, based on a water meter reading. As a general rule, whether
an unmetered or metered charging basis would result in a lower bill for a
specific customer depends on how much they currently pay, the number of
occupiers, and how much water is used
