2017/22 – Kimberley Park Reservoir (Queensland). E.coli

Kimberley Park (Qld) – E.coli

4/12/17: Kimberley Park elevated reservoir, Kimberley Park (Qld) – 1 MPN/100mL

4/2/19: Kimberley Park elevated reservoir, Kimberley Park (Qld) – 14 MPN/100mL

28/2/22: Kimberley Park WSZ. The non-compliance was a detection of E. coli from a routine
sample taken from the Kimberley Park Elevated Reservoir sample point (DSP033). 1MPN E.coli
organisms per 100mL was detected. Follow-up samples exhibited no continued presence
of E. coli and supply met ADWG (health) guidelines.

Escherichia coli should not be detected in any 100 mL sample of drinking water. If detected
in drinking water, immediate action should be taken including investigation of potential
sources of faecal contamination.

“Coliforms are Gram-negative, non-spore-forming, rod-shaped bacteria that are capable of aerobic and facultative anaerobic growth in the presence of bile salts or other surface active agents with similar growth-inhibiting properties. They are found in large numbers in the faeces of humans and other warm-blooded animals, but many species also occur in the environment.

Thermotolerant coliforms are a sub-group of coliforms that are able to grow at 44.5 ± 0.2°C. E. coli is the most common thermotolerant coliform present in faeces and is regarded as the most specific indicator of recent faecal contamination because generally it is not capable of growth in the environment. In contrast, some other thermotolerant coliforms (including strains of Klebsiella, Citrobacter and Enterobacter) are able to grow in the environment and their presence is not necessarily related to faecal contamination. While tests for thermotolerant coliforms can be simpler than for E. coli, E. coli is considered a superior indicator for detecting faecal contamination…” ADWG 2011