Analysis of Physico-Chemical Properties of Sumber Maron River in Malang, Indonesia during Dry Season

Changes in some chemical and physical properties of water are one of the causes of water pollution. These changes are also an indicator of water quality. The purpose of this study is to analyze water quality in the Sumber Maron river located in Kepanjen, Malang. Three sampling sites were selected spatially along the waterway from head stream (A), middle stream (B), and downstream (C) of the river as the sources of the water samples taken during the dry season. Using ANOVA and cluster analysis of the water quality, the physical and chemical properties of river water quality were analyzed from 11 water quality parameters: temperature, electrical conductivity, pH, total suspended solids, alkali, calcium, magnesium, sodium, dissolved oxygen, chemical oxygen demand, salinity and E. coli. The results indicated that COD and TDS are higher than the permissible limits in the Global Health Facility, while all the parameters of water quality are within the FAO standard for irrigation purposes. It indicates that the human activity in Sumber Maron has affected the water quality. Based on Indonesia government regulation No.82/2001, the water in Sumber Maron river was still suitable for irrigation and tourism (class II), except the levels of TDS and COD.