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Water Supplies

Volume 447: debated on Wednesday 14 June 2006

To ask the Secretary of State for Environment, Food and Rural Affairs what estimate he has made of the leakage of water in each water supply company region in each financial year since 1997. (76452)

Water company leakage figures are published annually by the water services regulation authority (publicly known as Ofwat) in the ‘Security of supply, leakage and the efficient use of water’ reports. Total water company leakage for each year since 1996-97, in megalitres per day, was reported as follows:

1996-97

1997-98

1998-99

1999-2000

2000-01

2001-02

2002-03

2003-04

2004-05

Anglian

242

240

206

190

194

224

192

216

214

Bournemouth and W Hants

29

26

26

23

23

22

22

22

22

Bristol

65

59

56

54

55

55

53

53

53

Cambridge

16

14

13

13

13

14

14

14

14

Dee Valley

13

12

12

13

12

11

11

10

11

Dwr Cymru

357

329

306

288

260

224

192

216

214

Folkestone and Dover

12

9

9

8

9

8

8

8

8

Mid Kent

38

36

30

29

29

29

28

30

29

Northumbrian North

192

184

171

168

164

161

153

160

155

Northumbrian South

85

82

76

73

72

73

67

70

67

Portsmouth

31

32

31

30

30

30

30

30

30

Severn Trent1

479

399

344

340

340

340

514

512

502

South East

99

108

98

97

85

75

72

69

69

South Staffordshire

90

82

77

76

72

71

71

71

74

South West

129

101

92

84

84

83

84

84

83

Southern

113

99

95

93

92

92

92

92

92

Sutton and East Surrey

27

26

25

24

24

24

24

24

24

Tendring

6

6

6

5

6

5

5

5

5

Thames

108

906

770

662

688

865

943

946

915

Three Valleys

199

172

157

145

140

157

152

152

149

United Utilities

666

579

510

487

463

452

465

479

500

Wessex

129

110

100

88

84

79

75

75

73

Yorkshire

430

377

342

317

304

297

296

295

293

1 In spring 2003, Severn Trent Water revised its water balance data. The company attributed most of the increase in leakage to methodological changes.