About 4,500 homes in Kent are experiencing water supply issues.
South East Water (SEW) said the disruption affecting several villages around Maidstone was caused by an electrical fault at a treatment works.
Incident manager Matthew Dean said: “We’re sorry to customers currently impacted by the water supply interruptions across our network in Kent.”
“We have resolved this issue, and are refilling the pipes slowly and carefully. We expect supplies to return later today.”