Electrical Conductivity as an Indicator to Assess the Suitability of River Water for Recreational Use

Urban rivers flowing through cities are places of recreation and relaxation for citizens. However, these sometimes contaminated by Escherichia coli (E. coli). Therefore, the purpose this study was to develop a simple method investigate E. contamination in river water. From May October 2019, water samples were collected from five locations Toga River Kobe City, Japan, fecal coliform density (FCD) measured, along with electrical conductivity chloride ion concentration Comparison quality parameters actual densities revealed high correlation between FCD. Whereas, little found FCD concentration. Receiver operating characteristic (ROC) analysis used evaluate that uses as an estimating parameter. The area under curve (AUC) measure performance ROC algorithm. calculated AUC value stayed high, above 0.95, over wide range values, suggesting rapid monitoring is appropriate assessing quantity contaminating coliforms higher than 300/100 mL.