There has been thunder and some heavy rain in Waikato this week but the district including Hamilton city and neighbouring Waipa are now on a water alert level 1.
It means sprinklers can only be used between 6am and 8am, and 6pm and 8pm at homes across those areas. Garden hoses may still be used at any time.
The move to water alert level 1 was triggered by a significant increase in water consumption across the region, according to a joint announcement by the three councils, Waikato, Waipa and Hamilton.
The statement said warmer weather had led to the increase in water consumption and since this time last month, use of Waikato District Council-supplied water had increased by 5 per cent a week.
Waikato District Council waters manager Karl Pavlovich said even though all of the council's water supply was now metered, water conservation was still an important part of managing the economic and ecological impact of water supply.