Water Quality

There are various ways of stating the river water quality. One way is in the form of classes from Class I to Class v. class I is the best while the Class V is the worst. This water quality class determined based on the water quality index (WQI). It was determined by 6 parameters, namely, pH, DO, BOD, COD, TSS and Ammoniacal Nitrogen.

 

River Water Quality Class Schedule

Class	Water Quality Index	Use Water
Class I	100.0 92.7 –	Preservation of natural Very minimal water treatment Species of marine life that is very sensitive
Class II	76.5 – 92.7	Conventional water treatment Sensitive marine life species Suitable for recreation
Class III	51.9 – 76.5	More comprehensive water treatment Suitable for livestock
Class IV	31.0 – 51.9	Suitable for irrigation
Class V	0.0 – 31.0	Water cannot be utilized

Another way is to declare the river water quality in the form of a category that is clean, slightly polluted and Corrupted which also determined through 6 parameters are the same.

 

Table Of Categories Of River Water Quality

Category	Water Quality Index
NET	81 – 100
A Little Contaminated	60 – 80
Corrupted	0 – 59

 

River Water Quality In The State Of Perak (Source: Doe)