Abstract
Abstract The bacterial quality of a total of 204 water samples representing 22 brands of bottled waters (both domestic and imported) obtained from retail outlets in the Cincinnati, Ohio, area was examined using the heterotrophic plate count and the total coliform multiple‐tube fermentation and membrane filtration techniques. It was found after 48 hr at 35°C that 27 percent of the samples of domestic bottled waters examined had bacterial heterotrophic plate counts in excess of 500 colony‐forming units (CFU) per ml, with the majority of these in the 1000 to 100,000 range, whereas 73 percent contained fewer than 500 bacteria as CFU per ml. All of the three imported brands had bacterial levels below 500 CFU per ml. Extended incubation of bacterial plates at room temperature for seven days resulted in a 17.3 percent increase in bacterial counts in excess of 500 CFU per ml, with the greatest predominance of recovery occurring in the 1000 to 100,000 range. No total coliforms were detected in any bottled vater ex...
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Schedule a callMore From: Journal of Environmental Science and Health . Part A: Environmental Science and Engineering
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