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Colony forming units (CFU) per 100 ml of water are indicated. (A) Aerobic mesophilic counts. (B) E. coli. (C) Enterococcus spp. For generic E. coli and Enterococcus spp., the first category (≤ 9 CFU per 100 ml) comprises samples from below the detection limit (1 CFU per 200 ml) up to 9 CFU per 100 ml. The percentage of water samples (total n = 36) falling into each category is displayed.
