17/1/22: Hamilton Valley, Albury (NSW). E.coli 2 orgs/100mL
“The E. coli detections occurred from sampling that took place on the same day. Chlorine and turbidity levels from the samples were within specification.
Once notification of the detections was received, inspections and water quality testing was conducted at the sampling sites and from the reservoirs
supplying the zones. There were no signs of contamination. Microbiology re-samples for both detection sites returned no E. coli or coliforms being
detected. The cause of the detections is unknown.”
“E.coli
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