Water Quality Monitoring at the Quiet Lakes
Current Blue-Green Algae Levels (as at 7 September 2010)
| Lake Legana | 5mm3/L |
| Lake Illawong | 1mm3/L |
| Lake Carramar | 3mm3/L |
What does this table show?
Red indicates that at the time of testing, swimming and other primary contact activities are not advised due to elevated blue-green algae levels.
Green indicates that at the time of testing, blue-green algae levels are deemed acceptable for swimming and other primary contact activities.
* Victorian Government recommended maximum level for primary contact: 10mm3/L.
Like any open waterway or body of water, the Quiet Lakes – lakes Legana, Illawong and Carramar - are impacted by the surrounding environment.
Factors such as stormwater, nutrient levels, low water flows and warm weather can affect water quality by increasing blue-green algae and E. coli levels.
We regularly monitor blue-green algae and E. coli levels to provide residents with the latest information.
See table on right for current blue-green algae levels for lakes Legana, Illawong and Carramar.
Melbourne Water conducts water quality monitoring at 136 sites along rivers and creeks in the Port Phillip and Westernport region.
Monthly blue-green algae levels – 2010
For historical blue-green algae information, click on the links below.
- Blue-green levels for 2009 (PDF, 11kb)
- Blue-green levels for 2008 (PDF, 11kb)
- Blue-green levels for 2007 (PDF, 11kb)
- E. coli levels - 1996-97 to 2009-10 (PDF, 15kb)