About the area
Portland sources groundwater from aquifers in the lower Otway region.
Portland has two water treatment plants producing potable water for urban use.
This system is supplied by Wannon Water.
Water balance
The table below shows the total volumes of water supplied from water resources in the Portland system in 2022-23.
Table 1: Water balance, Portland
| Water account component | 2021-22 (ML) | 2022-23 (ML) |
|---|---|---|
| Volume in store | ||
| Start volume in store | 0 | 0 |
| End volume in store | 0 | 0 |
| Change in store | 0 | 0 |
| Inflows | ||
| Inflow from surface water | 0 | 0 |
| Inflow from groundwater | 1,590 | 1,627 |
| Inflow from distribution system | 0 | 0 |
| Inflow from recycled water | 0 | 0 |
| Rainfall | 0 | 0 |
| Unattributed inflows | 0 | 0 |
| Total inflows | 1,590 | 1,627 |
| Outflows | ||
| Deliveries | ||
| Urban residential | 725 | 681 |
| Urban other | 609 | 694 |
| Pipeline | 0 | 0 |
| Passed to other systems | 0 | 0 |
| Total deliveries | 1,334 | 1,375 |
| Losses | ||
| Evaporation | 0 | 0 |
| System losses | 257 | 252 |
| Total losses | 257 | 252 |
| Total outflows | 1,591 | 1,627 |
| System efficiency | ||
| Distribution system efficiency (%) | 84% | 84% |
