Table 4.7              Limit Levels for E. coli for WSD Flushing Water Intakes

Parameter (unit)

Water Depth

Limit Level

E. coli

(cfu/100ml)

Depth average

20,000 cfu/100ml

Notes:

-       The limit level is based on the Water Supplies Department’s Criteria regarding the target limit of the flushing water.

-       For E. coli, non-compliance of water quality limits occurs when monitoring result is higher than the limit levels.