Abstract
This study was conducted to determine water quality parameters and measure the Water Quality Index (WQI) based on Interim National Water Quality Standards, Malaysia (INWQS) classification. The sampling was carried out on February 2017 which are Balok River (S1), Pengorak River (S2) and Karang River (S3). The physical and chemical parameters were temperature, DO, pH, TDS, turbidity, BOD, COD, TSS and AN. Results show that base on Malaysian WQI, and the water of S1, S2 and S3 were 70.737, 66.127 and 73.098 respectively. Two-way ANOVA with replication test (P < 0.05) shows that all water quality parameters had significant differences between the sampling stations. In conclusion, S1, S2 and S3 were categorized as a slightly polluted river (WQI) and were classified as Class III. Keywords: Gebeng industrial; water quality; Balok River; Pengorak River; Karang River
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