Auckland's water supply is at its highest level in 13 years, as months of downpours have filled lakes to their brim.
The lakes and dams from which Auckland takes its water are 99.8 per cent full, at least 15 per cent higher than usual for this time of year.
The dams in the Waitakere Ranges and Hunua Ranges which provide 80 per cent of the city's water, are officially 100 per cent full.
Watercare Services spokesman Daniel Wrigley said two months of high rainfall levels had completely replenished the water catchments for the first time since 1998.
"The combined capacity is 100 billion litres, so its fairly infrequent that they're all full," said Mr Wrigley.