Review Article
A Review of On-Site Wastewater Treatment Systems in Western Australia from 1997 to 2011
Table 4
Type of OWTS approved by DOHWA periods 1997–2011.
| Number | Location | System type | Year | Total | Total per LG | 97 | 98 | 99 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 |
| 1 | Belmont | ATU | | | | 1 | | | | | | | | | | 3 | | 4 | 25 | Unknown | | | | 5 | 2 | | | 1 | | 1 | | 1 | 4 | 2 | 5 | 21 |
| 2 | Cockburn | Septic tank | 19 | 6 | 9 | 5 | 3 | | 7 | 8 | 4 | 3 | 8 | 3 | 3 | 5 | 1 | 84 | 89 | ATU | 1 | 1 | 2 | | | 1 | | | | | | | | | | 5 |
| 3 | Cue | Septic tank | | | | | | | | | | | | 2 | | | | 2 | 3 | Treatment plant | | | | | | | | | | | | | 1 | | | 1 |
| 4 | Dandaragan | Septic tank | | | 27 | 47 | 31 | 36 | | | | | | | | | | 141 | 141 |
| 5 | Derby | Unknown | 39 | 38 | 17 | 22 | 29 | 34 | 29 | 13 | 8 | 15 | 17 | 15 | 6 | 14 | 9 | 305 | 305 |
| 6 | Donnybrook-Balingup | Unknown | | | | | | | | | | | | | | | 1 | 1 | 1 |
| 7 | Esperance | Septic tank | | | | | | 1 | 1 | 1 | | | | 3 | 3 | 1 | 3 | 13 | 24 | ATU | | | | | | | | | | | | 1 | 2 | 2 | 3 | 8 | Composting toilet | | | | | | | | | | 1 | | | | | | 1 | Others | | | | | | | | | | | | 1 | | | 1 | 2 |
| 8 | Fremantle | Septic tank | 1 | 1 | | | | | | | | | | 1 | | | | 3 | 4 | Composting toilet | | | | 1 | | | | | | | | | | | | 1 |
| 9 | Gosnells | Septic tank | | | | | | | | | | | | 1 | | | | 1 | 3 | ATU | | | | | | | | | | 1 | | | | | 1 | 2 |
| 10 | Joondalup | Septic tank | 10 | 1 | | | 1 | | | | | | | | | | | 12 | 12 |
| 11 | Kalamunda | Septic tank | | | | | | | | | 3 | 2 | 3 | 2 | 4 | 6 | 4 | 24 | 48 | ATU | | | | | | | | | 3 | 2 | | 5 | 3 | 3 | 3 | 19 | Treatment plant | | | | | | | | | | | | | | | 1 | 1 | Others | | | | | | | | | | | 1 | 1 | | 2 | | 4 |
| 12 | Manjimup | Septic tank | 6 | 14 | 11 | 7 | 15 | 8 | 8 | 4 | 2 | 4 | | 3 | | | | 82 | 92 | ATU | 1 | 1 | 2 | 1 | | | | | | 2 | | 2 | | | | 9 | Composting toilet | | | | | 1 | | | | | | | | | | | 1 |
| 13 | Mundaring | Septic tank | 1 | 1 | 1 | 5 | 3 | | 2 | | 1 | 9 | 10 | 9 | | 5 | 14 | 61 | 76 | ATU | | 2 | 1 | 1 | | 2 | | | | 1 | 1 | | | 2 | 2 | 12 | Greywater | | | | | | | | 1 | | | | | | | | 1 | NRS | | | | | | | | | | 2 | | | | | | 2 |
| 14 | Murchison | Treatment plant | | | | | | | | | | | | 2 | | | | 2 | 2 |
| 15 | Plantagenet | Septic tank | | | | | | | | | | 1 | | 1 | | | | 2 | 2 |
| 16 | Port Hedland | Septic tank | | | | | | | | | | | 9 | 24 | 26 | 13 | 22 | 94 | 114 | ATU | | | | | | | | | | | 1 | 1 | 2 | 2 | 4 | 10 | Treatment plant | | | | | | | | | | | | | | | 1 | 1 | Others | | | | | | | | | | | 3 | 1 | 1 | 1 | 3 | 9 |
| 17 | Serpentine-Jarrahdale | Septic tank | | | | | | | | | | | | 1 | 1 | 2 | | 4 | 13 | ATU | | | | | | | | | | | 1 | 1 | 1 | 4 | 2 | 9 |
| 18 | Stirling | Septic tank | 8 | 20 | 14 | 7 | 8 | | | 1 | | 1 | 1 | | | | | 60 | 69 | ATU | | 3 | 2 | 3 | 1 | | | | | | | | | | | 9 |
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