A Review on Factors to be Incorporated in Water Quality Study

Water quality issues had been the main concern in worldwide as water resource keeps being polluted. River acts source of drinking water, habitat for aquatic life, agriculture and industry. Poor led to increase n treatment expenses, scarcity affect health. pollution is caused by industrial discharge, sewage wastewater, chemical fertilizers pesticides mining activities. This paper aims review comments on factors be incorporated study. index pollutants are found critical factors. USA, Canada, Iraq, Thailand, Vietnam Malaysia used different parameters calculating WQI. The considered WQI then classified river according their classes usage. Department Environment (DOE) has highlighted three study which Biochemical Oxygen Demand (BOD), Ammoniacal Nitrogen (NH3N) Suspended Solid (SS) due great influence calculation. However, standard treated still based Environmental Quality Act, 1974 nearly 50 years ago. Emerging mainly organic compounds present pharmaceuticals personal care products resources nowadays should improvised along time. Some modification class usage irrigation relevant considering two oxygen demands (BOD COD).