Table 5.1 Water Quality Objectives for Inland Waters
|
Parameters |
Water Quality Objectives (WQOs) |
Water Control Zones (WCZs) or sub-zones to which the WQOs apply |
|
PH |
6.5 – 8.5 |
Mui Wo (C), (E) sub-zones |
|
6.0 – 9.0 |
Other inland waters except
Mui Wo (A), (B), (D), (F) sub-zones |
|
|
Suspended solids (SS) |
Annual median £ 20 mg/L |
Mui Wo (C), (E) sub-zones |
|
Annual median £ 25 mg/L |
Other inland waters except
Mui Wo (A), (B), (D), (F) sub-zones |
|
|
Dissolved oxygen (DO) |
³ 4 mg/L |
All parts of WCZ |
|
Chemical
oxygen demand (COD) |
£ 30 mg/L |
All parts of WCZ |
|
5-day biochemical
oxygen demand (BOD) |
£ 5 mg/L |
All parts of WCZ |