"Last week the reservoir was less than half full. We need it full so we can turn off the water plant, clean out all the filters then reinstate the manufacturing plant again," he said.
A council spokesperson said treatment staff had been working 24/7 to manage the issue and, when necessary, drinking water was being transported from Mangaweka to the Taihape reservoir.
"In order to resolve the issue, we are relying on the community to conserve water so that the reservoir levels can increase," they said.
"The reservoir is currently making slow gains and we thank the public for their ongoing co-operation."
The spokesperson said if people failed to reduce their water usage, restrictions would be imposed, such as a complete ban on all outside water usage.
The last conserve water notice in Taihape was placed last winter for the same reasons.
The conserve water request ran from July 28 to August 2, with no restrictions imposed.