§ Mrs. Helen JacksonTo ask the Secretary of State for the Environment in how many households the water pressure in the communication pipe fell below 7m static head for more than one hour on two occasions in any period of 28 days in(a) 1991–92, (b) 1992–93, (c) 1993–94, (d) 1994–95 and (e) 1995–96; and in how many households this occurred more than once in (i) 1991–92, (ii) 1992–93, (iii) 1993–94, (iv) 1994–95 and (v) 1995–96. [10201]
§ Mr. Clappison[holding answer 13 January 1997]: The information requested is not available. Information on inadequate water pressure for the years 1991–92 to 1995–96, measured against the Director General of Water Services' service indicator, DG2, is available for each year for which information is requested in Ofwat's annual "Report on levels of service for the water industry in England and Wales", copies of which are in the Library. DG2 uses a reference level of 10m static head with a flow of 9 litres per minute to measure the adequacy of pressure. This should be sufficient to fill a one gallon—4.5 litre—container in 30 seconds from a ground floor kitchen tap.