Water Quality Data Analysis from the Onlimo Monitoring System at 16 Stations in Priority Watersheds and Lakes

Abstract Currently, the decline in quality of river and lake water continues, for this reason, activities to control pollution improve are required. One effort prevent problem is implement online monitoring technology continuously real time. The information generated from system can be used as a basis planning watershed management determining policies at national regional levels. purpose activity analyze data evaluate performance systems 16 stations that have been built. being analyzed 2016 2020 includes parameters temperature, conductivity, TDS, DO, pH, turbidity. station locations spread over Ciliwung River, Cisadane Citarum Serayu Bengawan Solo Lake Toba. This research method uses descriptive statistical analysis STORET method, which refers Decree Minister Environment Forestry Number 115 2003 Government Regulation Republic Indonesia 82 2001. results study indicate most rivers monitored fall into moderate heavily polluted category, especially downstream Ciliwung, Cisadane, rivers. turbidity stations, mostly met Class II standards.