The Bacteriological Quality of Tidal Bathing Waters in Sydney (Australia)

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Abstract
The bacteriological quality of Sydney's tidal bathing waters has been regularly monitored during summer months over the past decade. Tests for faecal coliforms have been supplemented in the last 5 years with tests for faecal streptococci, Salmonella and Pseudomonas aeruginosa. Results show that higher levels of faecal coliforms are associated with increased concentrations of faecal streptococci and P. aeruginosa and an increase in the incidence of Salmonella. The extent of bacteriological contamination of a bathing water is influenced by distance from the point of pollution discharge and the occurrence of rainfall. The availability of detailed survey data enables more effective recognition of incidents of significant pollution and the likelihood of an increased public health risk.

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