Whanganui District Council says work is under way to flush some of the city's pipes after further complaints of discoloured tap water.
The council said late yesterday it had received multiple complaints of discoloured water in the Whanganui suburb of Aramoho in recent days, with many residents taking to social media to air their frustration.
"We have received several reports of discoloured water in the Aramoho area and have been investigating. No maintenance activities were being carried out within the Aramoho network at the time that could have been potential sources," a council spokesman said.
"Our investigations indicate a probable cause being recent power supply outages affecting the plant. This could have stirred up low levels of sediment within the reservoirs."
The council spokesman said checks of the safety of the water had been conducted and there was no cause for concern.