Assessment of water quality in Setiu River Basin, Terengganu

Abstract

An assessment of the river water quality according to the water quality standards in Setiu River Basin and the identification of significant temporal spatial trends were done in the study. 14 parameters were considered to compute Water Quality Index (WQI) based on Department of Environment Malaysia and classification was being made in accordance to Interim National Water Quality Standards (INWQS). The selected parameters were water temperature, pH, electrical conductivity, salinity, dissolved oxygen, total suspended solids, biochemical oxygen demand, chemical oxygen demand, ammoniacal nitrogen, nitrate, nitrite, urea, phosphates and chlorophyll-a.