Residents in Pontllanfriath, Pennaen, Blackwood, Wyllie, Oakdale, and Ynysddu, have all been affected by a burst water main, Welsh Water has said.
A spokesman for Welsh Water said: “A burst water main is affecting drinking water supplies this morning, customers may be experiencing no water or low pressure in Pontllanfriath, Pennaen, Blackwood, Wyllie, Oakdale, Ynysddu and surrounding areas.
“We’re onsite investigating and apologise for any inconvenience caused.”