Fig. 6. Escherichia coli concentrations in water and caged zebra mussels sampled daily in a number of sites along Red Run Drain and its tributary, Bear Creek. Monitoring sites were at (A) Bear Creek (Site 7), (B) Red Run (Site 8), (C) Denton (Site 3), and (D) Metropolitan (Site 9). Rainfall, indicated by the vertical black bars at the top of the figure, is an average of the three rain gauges located 1.6 to 3.2 km (1 to 2 miles) from the confluence of Bear Creek and Red Run Creek