"It's a huge result, although we're not out of the woods yet. We need to take a precautionary approach and continue our water conservation efforts, at least until the next significant rainfall lifts river flows again."
Regional Council water supply manager Chris Laidlow said the most recent rain, more than a week ago, had been more significant than initially predicted.
"It was heavier and went on for longer. This meant more rain soaked into the ground, resulting in river levels staying higher for longer."
The higher levels mean more water can be drawn from rivers for supply, taking pressure of the Hutt aquifer and allowing the Stuart Macaskill storage lake to be refilled.
Mr Laidlow said river levels could return to the levels they were at two weeks ago without more rain by mid-April.
"Another couple of days rain should put us in a good position to consider lifting restrictions."
Neighbours have been dobbing in residents who flout the outdoor water use ban.
Wellington City Council this week sent warning letters to 50 residents who had washed cars, hosed down paths, cleaned boats or watered plants.
It had not yet issued any infringement notices, but repeat offenders would face a fine.
The council has discretion to set the amount of smaller fines, while courts could impose a fine of up to $20,000.
Warnings have also been sent to Lower Hutt residents, while infringement notices were being issued in the first instance in Upper Hutt.
