SD: standard deviation; TC: total coliform; FC: fecal coliform; EC: E. coli; FS: fecal streptococci; IE: Enterococcus spp.; MPN: most probable numbers; CFU: colony-forming units; Turb: turbidity; Temp: water temperature; Level: water level; Inflow: daily inflow; NTU: nephelometric turbidity units; TDS: total dissolved solids.