The most recent water quality tests in Medina Lake and in area rivers produced low concentrations of E. coli bacteria in each of the 25 areas tested except one on Seco Creek in far southwest Bandera County that exceeded the hazardous level for E. coli in early May only to fall well under acceptable concentration a week later. The testing was conducted by the Bandera County River Authority and Groundwater District at first on May 6 and 7 and then again on May 14 at Seco Creek and Farm Road 470 where the lone violation of E. coli concentration limits was ...