| Table 5.3 Per capita average daily water consumption, 1971-1996 |
| | Unit demand l/h/d2 | | Demand % |
| Year | Total1 | | Population2 | Unmetred | Metred and | Unmetred | Metred and |
| | | | | | (thous) | | | non-potable | | | Non-potable |
| 1971 | | 407 | | | 5,228 | | 266 | | 142 | | 65 | | 35 |
| 1973 | | 421 | | | 5,212 | | 269 | | 152 | | 64 | | 36 |
| 1975 | | 425 | | | 5,206 | | 274 | | 151 | | 64 | | 36 |
| 1976 | | 431 | | | 5,205 | | 281 | | 150 | | 65 | | 35 |
| 1977 | | 439 | | | 5,196 | | 283 | | 156 | | 65 | | 35 |
| 1978 | | 443 | | | 5,179 | | 288 | | 155 | | 65 | | 35 |
| 1979 | | 445 | | | 5,167 | | 289 | | 156 | | 65 | | 35 |
| 1980 | | 434 | | | 5,153 | | 298 | | 137 | | 69 | | 31 |
| 1981 | | 439 | | | 5,149 | | 308 | | 131 | | 70 | | 30 |
| 1982 | | 435 | | | 5,166 | | 304 | | 131 | | 70 | | 30 |
| 1983 | | 434 | | | 5,150 | | 311 | | 123 | | 72 | | 28 |
| 1984 | | 427 | | | 5,146 | | 300 | | 127 | | 70 | | 30 |
| 1985 | | 428 | | | 5,137 | | 301 | | 127 | | 70 | | 30 |
| 1986 | | 438 | | | 5,121 | | 313 | | 125 | | 71 | | 29 |
| 1987 | | 429 | | | 5,112 | | 304 | | 125 | | 71 | | 29 |
| 1988 | | 433 | | | 5,094 | | 309 | | 124 | | 71 | | 29 |
| 1989 | | 442 | | | 5,090 | | 309 | | 133 | | 70 | | 30 |
| 1990 | | 451 | | | 5,102 | | 322 | | 129 | | 71 | | 29 |
| 1991 | | 439 | | | 5,100 | | 313 | | 126 | | 71 | | 29 |
| 1992 | | 432 | | | 5,107 | | 314 | | 118 | | 73 | | 27 |
| 1993 | | 444 | | | 5,120 | | 325 | | 119 | | 73 | | 27 |
| 1994 | | 441 | | | 5,132 | | 322 | | 119 | | 73 | | 27 |
| 1995 | | 452 | | | 5,137 | | 340 | | 112 | | 75 | | 25 |
| 1996 | | 463 | | | 4,996 | | 338 | | 117 | | 74 | | 26 |
| 1996 by Water Authority | | | Population in area served (x1000)1 |
| North | | 387 | | | 1,101 | | 283 | | 104 | | 73 | | 27 |
| West | | 498 | | | 2,321 | | 388 | | 109 | | 78 | | 22 |
| East | | 464 | | | 1,574 | | 301 | | 137 | | 69 | | 31 |
| | | | | | | | | | | | | | Source: SOWSU |
| 1 | | Litres per head per day. |
| 2 Population refers to resident population connected to the public water supply. These figures are estimated by the Water Authorities. |
|