Tokyo is well above average in the
water category. As with most of the more affluent cities in the Index, it has a high rate of consumption, at 320 litres per person per day, compared to the Index average of 278 litres.
However, the city has the best water leakage
rate in the Index, at 3%, compared to the Index
average of 22%. Tokyo officials say the low leakage rates are due to the high number of checkpoints in the system, far more than are mandated by national standards. In addition, 98% of old
pipes had been replaced by 2008, with the city
aiming to replace 100% by 2013. Water policies
are strong in Tokyo, and officials are continually
looking for ways to improve on a strong foundation