Total coliform: fecal coliform ratio for evaluation of raw water bacterial quality.
D001431:Bacteriological Techniques; D004926:Escherichia coli / Q000302:isolation & purification*; D007196:Indiana; D007629:Kentucky; D009820:Ohio; D010414:Pennsylvania; D012499:Sanitation; D014871:Water Microbiology; D014881:Water Supply