Application of Multivariate Statistical Analysis in Evaluation of Surface River Water Quality of a Tropical River

Table 4

Classification of water quality of the Batang Baram from upstream to downstream regions according to WQI.

Station	Class							Status
	AN	BOD5	COD	DO	pH	TSS	WQI
1	III	III	IV	II	I	III	III	Slightly polluted
2	III	III	III	II	II	II	III	Slightly polluted
3	III	III	III	II	I	III	III	Slightly polluted
4	III	III	III	II	II	IV	III	Slightly polluted
5	III	III	IV	II	II	III	III	Slightly polluted
6	III	II	III	II	I	IV	III	Slightly polluted
7	III	III	IV	II	I	III	III	Slightly polluted
8	III	III	III	II	II	II	III	Slightly polluted
9	III	III	III	II	II	III	III	Slightly polluted
10	III	III	III	II	I	III	III	Slightly polluted
11	II	II	V	II	I	IV	III	Slightly polluted
12	II	II	V	II	I	I	II	Slightly polluted
13	II	III	V	II	I	I	III	Slightly polluted
14	II	III	V	II	I	IV	III	Slightly polluted
15	III	III	V	II	I	IV	III	Slightly polluted
16	II	II	V	II	I	II	II	Slightly polluted
17	II	II	IV	II	I	II	II	Slightly polluted
18	II	III	V	II	I	IV	III	Slightly polluted
19	II	II	V	II	I	V	III	Slightly polluted
20	II	II	IV	II	I	V	III	Slightly polluted
21	IV	II	IV	II	I	I	III	Slightly polluted
22	IV	II	IV	II	II	IV	III	Slightly polluted
23	III	II	IV	II	I	II	II	Slightly polluted
24	IV	II	III	I	I	IV	III	Slightly polluted
25	IV	II	V	II	I	III	III	Slightly polluted
26	III	II	II	II	I	I	II	Clean
27	III	II	II	I	II	IV	III	Slightly polluted
28	III	II	III	II	I	I	II	Clean
29	II	II	IV	II	I	IV	III	Slightly polluted
30	III	II	V	II	I	I	III	Slightly polluted