Tap water to some Castlecliff homes should now be running clear as contractors work to fix the city's water supply.
Whanganui's water has been running discoloured since Wednesday afternoon after dirty water entered the reticulation system following emergency repairs.
Castlecliff appears to have been affected first with the problem spreading across the city.
"We have been advised by contractor, Veolia, that the supply from Longbeach Dr to Manuka Street within the Castlecliff area is now clear and we are moving to other areas such as Springvale and Otamatea," Whanganui District Council said in the written statement on Thursday afternoon.
"We are hoping to have most areas completed within a couple of hours."