River pollution in Yogyakarta City

Water is one of the most important resources to support human life. However, from time to time the problems related to water are getting more complex. In addition to the increasingly limited number, the quality of the water is also decreasing due to pollution. The river is a body of water that is very easily polluted because until now it is still a place for liquid waste disposal for some human activities and its open location. The purpose of this study was to analyze river water pollution in the city of Yogyakarta. For this reason, data collection results from water quality monitoring of the Winongo River, Code River, Manunggal River and Gajahwong River were carried out by the Yogyakarta City Environment Service. Furthermore, a comparative descriptive analysis was carried out, namely by comparing water quality data with quality standards. The parameters compared were Nitrate, BOD, COD and E. coli. In addition, a spatial analysis was also carried out by comparing the level of water pollution from the four rivers. The results showed that all rivers in the city of Yogyakarta have been polluted. In terms of the level of pollution, the Winongo River is the least polluted river because only the Esherichia coli concentration exceeds the quality standard and is polluted by nitrate in the two monitoring allocations in the southern part. The Manunggal River which is the smallest river actually experiences the heaviest pollution. Apart from E. coli, the concentrations of BOD and COD in this river also exceeded the quality standards in all monitoring locations. With the same amount of waste, the factor of the small size of the river is probably the cause of the high level of pollution in this river. © 2025 Institute of Physics Publishing. All rights reserved.