Residents of Banksmeadow, inundated by as much as a metre of water from a burst main last week, will get little consolation knowing they are far from alone battling leaky pipes.

Leakage rates across the metro region jumped by almost a seventh in the year to the end of June, according to Sydney Water's recently released Water Conservation Report. Water losses amount to more than 47 billion litres a year, or the equivalent of about 52 Olympic-sized swimming pools per day.

Resident Chris Hanna's property on Stephen Road in Botany was flooded last week after a main burst. Credit:Peter Braig

So-called high-priority bursts rose almost a third in the past year to top 12,000. Perhaps most concerning was the doubling in time it took Sydney Water to fix such leaks, with average response times jumping from under two days in the previous year to 98 hours.

The spike in leakages comes as the city's reservoirs lately resumed their falls after last month's "once in a century storm". The rain dump ended Sydney's wettest spring since 1995, the Bureau of Meteorology said.