E.Coli was detected at all 5 sample points at levels of between 1 and 5 CFMU.
It was much later confirmed that the numerous errors with chlorine sampling were being made and the water officers competence is currently being assessed to determine if the Boil Water Alert can be removed.
Water Officer underwent retraining. The chlorine pump was gassing up and needed to be checked regularly.
The Boil Water Notification was removed on 5/01/16.
E.Coli was detected at 3/5 locations – Water Shed, M.Loban house and Village tap. E.Coli levels were between 2 and 4.1CFMU.
E.Coli failures were ongoing throughout 2016 which were largely caused by chorine dosing issues, but high turbidity of the filtered well water was also thought to be a contributing factor for some failures which reduce the effectiveness of chlorination. Numerous errors in the chlorine sampling technique resulted a failure to identify the inadequate chlorination. It is suspected that there is an issue with the media filters, which is due to be addressed early in 2017.
The Boil Water Notice at Hammond was in place from 13/01/2016 to 21/11/16. The Boil Water Notice was lifted under the condition that the well water would not be used.
“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