Backflow Incidents

Bangholme water treatment plant

As reported in the Star Group and Herald Sun Newspapers
EMPLOYEES at a Bangholme water treatment plant were drinking water typically used to flush toilets and urinals for more than two weeks.
In a plumbing mix-up this week admitted by Melbourne Water, about 25 employees at its Eastern Treatment Plant in Bangholme had been drinking Class-C recycled water, which is normally unfit for human consumption.
Melbourne Water released a statement this week describing the problem.
“Water was supplied through a tap that should supply drinking water,” it said.
The water authority will now investigate the mix-up to determine why a tap marked as drinking water was in fact running the low-grade recycled water.
Eastern Treatment Plant manager Mike Smith said the recycled water had been screened, chlorinated, filtered and chlorinated again.
But he admitted that several employees had complained they were ill during the time the recycled water was running through the tap.
“We have had several reported cases of gastro-intestinal illness and these will be investigated to see if they are related to the incident,” Mr Smith said.
“We are doing everything we can to support our people.
“It has happened as a result of a cross connection and should not have occurred.
“We are treating this matter very seriously and we will be taking all the necessary steps to ensure it doesn’t happen again.”
Mr Smith said the water was normally used to flush toilets, urinals and other activities around the plant – but was never intended for drinking.
Melbourne Water has since switched off the supply and notified its staff, as well as the Department of Human Services.


Health scare at a Victorian Football Club

AS REPORTED BY THE SYDNEY MORNING HERALD
“A major plumbing blunder has prompted a health scare at South Barwon Football Club. It was yesterday revealed untreated water had been connected to the clubrooms’ internal water supply for the past two months. …a licensed plumber carrying out works on behalf of the City had inadvertently (cross) connected untreated water being used to irrigate the reserve to the clubrooms’ internal water supply in February.“


Ranger Uranium Mine — NT, 2004

At the Ranger uranium mine near Jabiru, process water contaminated the potable water system. The investigation found that a hose connected the process-water system to the potable-water system, and higher pressure in the process system forced contaminated water into the drinking-water supply — a textbook back-pressure event.
The incident exposed workers to water containing extremely high uranium levels; ABC reported that 28 workers became ill after drinking or showering in the contaminated water.
The Australian Government’s Supervising Scientist subsequently investigated the incident. The investigation identifies the potable-water contamination and its cause.


Top