But Mid-Southern Water's leakage rose by 6 per cent since last year, from 196 litres per property per day to 205 litres - the highest increase recorded by any company. The company serves 650,000 people on the southern fringes of London and Surrey.
The other five offenders are: mid-Southern's sister company, Eastbourne- based South East Water, which serves 650,000 in west Kent and Sussex, Wrexham, Three Valleys, covering a large swathe of country north-east of London, Bournemouth and West Hampshire, and Northumbrian, with 2.5 million consumers in England's far north-east.
The most impressive performance in cutting leakage came from the giant Severn Trent company, with a 24 per cent fall over the year, followed by Chester, with a 23 per cent reduction.
Britain's biggest water company, Thames, cut leakage by a modest 2.3 per cent and remains the largest overall leaker, with 321 litres lost per property per day.Reuse content