| Yearr | Total length | Type of sewers1 | |||||
|---|---|---|---|---|---|---|---|
combined sewers | seperat sewers | ||||||
| total | foul water sewers | rainwater sewers | |||||
| kilometres | % | kilometres | % | kilometres | |||
| 1: Includig outfall sewers. | |||||||
| 2022 | 619,291 | 248,979 | 40.2 | 370,311 | 59.8 | 225,846 | 144,465 |
| 2019 | 608,364 | 247,973 | 40.8 | 360,427 | 59.2 | 220,489 | 139,938 |
| 2016 | 594,335 | 246,699 | 41.5 | 347,636 | 58.5 | 214,280 | 133,355 |
| 2013 | 575,580 | 242,866 | 42.2 | 332,714 | 57.8 | 206,234 | 126,480 |
| 2010 | 561,581 | 241,013 | 42.9 | 320,568 | 57.1 | 199,631 | 120,937 |
| 2007 | 540,723 | 239,086 | 44.2 | 301,637 | 55.8 | 187,264 | 114,373 |
| 2004 | 514,884 | 238,201 | 46.3 | 276,683 | 53.7 | 170,651 | 106,032 |
| 2001 | 486,159 | 233,907 | 48.1 | 252,252 | 51.9 | 154,628 | 97,624 |
| 1998 | 445,951 | 226,657 | 50.8 | 219,295 | 49.2 | 134,263 | 85,032 |
| 1995 | 399,202 | 213,491 | 53.5 | 185,711 | 46.5 | 109,372 | 76,339 |
| 1991 | 357,094 | 199,906 | 56.0 | 157,188 | 44.0 | 90,143 | 67,045 |
As at 09 October 2024