§ Mr. Wigleyasked the Secretary of State for the Environment what is the average water consumption per capita in the areas served by each water authority in England and Wales.
§ Mr. MarksSince few water supplies to domestic and commercial premises are measured, it is not possible to give consumption figures. The following figures are quantities of potable water put into supply for all purposes; they include water lost by leakage and other waste and have been derived from the National Water Council's annual report for 1975–76:
Water Authority Quantity supplied per head of population served (litres per day) North West … … 334 Northumbrian … … 287 Severn-Trent … … 266 Yorkshire … … 281 Anglian … … 283 Thames … … 295 Southern … … 288 Wessex … … 310 South West … … 294 Welsh National … … 350
§ Mr. Wigleyasked the Secretary of State for the Environment what is the water consumption per capita in London, Birmingham, Liverpool, Manchester, Cardiff and Swansea; and what is the estimated proportion used in each case for non-domestic purposes.
§ Mr. MarksSince few water supplies to domestic and commercial premises are measured, it is not possible to give consumption figures. The following figures are the total quantities of water put into supply for all purposes, including loss by leakage and waste. The quantities of water used for non-domestic purposes supplied unmeasured are not available to my Department.