| Areas\Years | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 |
| Perth Metro* | 375.0 | 387.5 | 362.5 | 362.5 | 352.5 | 347.5 | 344.3 | 331.5 | 336.6 | 347.5 |
| Ridgewood | 265.9 | 178.7 | 165.0 | 253.8 | 300.7 | 302.6 | 285.2 | 285.5 | 292.6 | 282.9 |
| Butler (except “The Green”) | 258.7 | 282.6 | 371.1 | 391.0 | 364.2 | 346.2 | 333.6 | 290.9 | 269.5 | 278.3 |
| The Green-Drinking Water |
|
|
| 6.7 | 37.9 | 91.3 | 116.9 | 154.4 | 167.6 | 172.3 |
| -Groundwater |
|
|
|
|
|
| 54.1 | 188.8 | 167.5 | 115Ψ |
| -Total |
|
|
| 6.7 | 37.9 | 91.3 | 171.0 | 343.3 | 335.1 | 287.3Ψ |