Waikato residents will only be allowed to use their sprinklers and watering systems on alternate days in two, two-hour windows in an attempt to conserve water.
A joint statement between the Hamilton City Council, Waikato District Council and the Waipa District Council, said the warmer weather and increasing water demand had prompted the councils to move to "alert level 2" to help conserve water.
That meant even street numbers could use sprinklers and watering systems on even days and odd street numbers on odd days, between 6am and 8am and 6pm and 8pm.
Hamilton City Council's city acting waters manager, Maire Porter said she appreciated the effort people had made so far this summer and said the move to [alert level 2] was expected given historical trends and the recent warmer weather.
"Our residents have done a great job with water conservation so far, but as people return from holiday, coupled with our growing population, we have seen a steady climb in water usage. With the warm dry weather expected to continue we have to ensure we don't use more water than we need so there is enough water for everyone. "