Water Quality Assessment of Rivers in Padang Using Water Pollution Index and NSF-WQI Method

Dewata, Indang (2019) Water Quality Assessment of Rivers in Padang Using Water Pollution Index and NSF-WQI Method. International Journal of GEOMATE, Vol.17. pp. 192-200. ISSN 2186-2982 (P), 2186-2990 (O), Japan

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Abstract

The study was conducted on 4 major rivers in Padang, namely Kandis River, Air Dingin River, Kuranji River, and Arau River to determine the status of water quality using the Pollution Index (PI) and NSF-WQI method. These rivers are used as drinking water sources and for the purpose of fisheries, agriculture and water recreation so that quality needs to be analyzed. The data used is dry season data at 6 sampling stations for each river since years 2015 - 2018 by analyzing 12 parameters, namely total suspended solids, total dissolved solids, pH, dissolved oxygen, biological oxygen demand, ammonia, nitrates, nitrites, total Phosphates, Fecal coliform, chemical oxygen demand and temperature. The analysis results showed that the status of water quality of 4 major rivers in the city of Padang from 2015 until now has been in a lightly polluted and moderately polluted condition. The pollution index of all rivers is in the range of 2.11-6.06. The calculation of water quality index shows that almost at all stations, river water quality is in a bad category with NSF-WQI values in the range of 29.27- 48.75. It is hoped that the results of this research can be used to improve the quality of the Kandis River, Air Dingin River, Kuranji River, and Arau River so that these rivers can be utilized in accordance with their purposes.

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