Aucklanders used 15 million litres more than the target yesterday.
Watercare announced the water consumption was 415 million litres yesterday; six million litres more than Tuesday.
Watercare chief executive Raveen Jaduram said they were continuing to try to increase production at the Ardmore Water Treatment Plant.
"While we missed the target yesterday, we are confident that Aucklanders are making a concerted effort to reduce their water use. At this time of year, we would expect demand to be a lot higher. For example, on Wednesday 1 March the city used 444 million litres - substantially more than it used yesterday.
"If Aucklanders continue to reduce their water consumption, together we will avoid a boil water notice."
Watercare said it was going to take weeks for silt in the Hunua dams to settle after last week's devastating storms sent torrents of dirty water into the system. Until then, the region's largest water treatment plant at Ardmore would remain under pressure.