Water and sewerage companies

Anglian (including Hartlepool Water)

25,516

28,586

33,222

Dwr Cymru

18,753

15,042

19,947

Northumbrian Water (including Essex and Suffolk Water)

41,743

34,489

31,292

Severn Trent Water

38,594

33,215

44,331

South West Water

26,330

28,528

23,162

Southern Water

35,847

19,224

21,160

Thames Water

47,204

34,519

36,288

United Utilities

39,503

37,734

58,240

Wessex Water

11,325

11,277

18,570

Yorkshire Water

32,391

25,176

40,144

Water only companies

Bournemouth and West Hampshire Water

6,353

4,755

4,806

Bristol Water

7,285

5,949

9,431

Cambridge Water

1,466

1,381

1,432

Dee Valley Water

2,659

2,432

2,487

Folkestone Water

5,117

3,793

3,787

Portsmouth

5,797

3,734

5,219

South East Water (including Mid-Kent Water)

21,959

14,489

13,339

South Staffordshire Water

6,176

4,344

7,568

Sutton and East Surrey Water

8,871

5,814

7,179

Tendring Hundred Water

1,110

890

1,242

Three Valleys Water

40,933

30,351

28,247