Drinking Water Inspectorate check that the water companies in England and Wales supply water that is safe to drink and meets the standards set in the Water Quality Regulations.
(the standards; set; in the Water Quality Regulations) (Wales supply water; is; safe) (Wales supply water; to drink; ) (Wales supply water; meets; that the water companies in England and Wales supply water that is safe to drink and meets the standards set in the Water Quality Regulations)
the standards Wales supply water Wales supply water Wales supply water
set is to drink meets
in the Water Quality Regulations
safe
that the water companies in England and Wales supply water that is safe to drink and meets the standards set in the Water Quality Regulations