Table 4.1 Summary of Water Quality Objectives for Victoria Harbour WCZ
|
Parameters |
Objectives |
Sub-Zone |
|
Offensive Odour, Tints |
Not to be present |
Whole zone |
|
Visible foam, oil scum, litter |
Not to be present |
Whole zone |
|
Dissolved Oxygen (DO) within 2 m of the seabed |
Not less than 2.0 mg/L for 90% of samples |
Marine waters |
|
Depth-averaged DO |
Not less than 4.0 mg/L for 90% of samples |
Marine waters |
|
pH |
To be in the range of 6.5 - 8.5, change due to human
activity not to exceed 0.2 |
Marine waters |
|
Salinity |
Change due to human activity not to exceed 10% of
ambient |
Whole zone |
|
Temperature |
Change due to human activity not to exceed 2 oC |
Whole zone |
|
Suspended solids (SS) |
Not to raise the ambient level by 30% caused by
human activity |
Marine waters |
|
Unionised Ammonia (UIA) |
Annual mean not to exceed 0.021 mg/L as unionised
form |
Whole zone |
|
Nutrients |
Shall not cause excessive algal growth |
Marine waters |
|
Total Inorganic Nitrogen (TIN) |
Annual mean depth-averaged inorganic nitrogen not to
exceed 0.4 mg/L |
Marine waters |
|
Toxic substances |
Should not attain such levels as to produce
significant toxic, carcinogenic, mutagenic or teratogenic effects in humans,
fish or any other aquatic organisms. |
Whole zone |
|
Human activity should not cause a risk to any
beneficial use of the aquatic environment. |
Whole zone |