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Where can I find statistics on leakage?

We produce an annual report on security of supply, leakage and the efficient use of water and this contains statistics on total industry leakage, company estimates of total leakage, leakage targets and the components of leakage.

For further information please see: Security of supply 2006-07 report, pages 7 - 17 and supporting information on:
The water balance and estimating leakage
Assessing performance against targets and taking action