Torrens Lake has been closed for several weeks because of high levels of bacteria in the water, and the shutdown has now hit rowing clubs, boat operators and anyone else who uses the River Torrens system. The closure, caused by enterococci bacteria, is the third time this year that parts of the river have been made inaccessible to users. The people who live and work around the lake are left dealing with the mess while the council and other authorities debate what to do next.
Who Pays for the Breakdown
High levels of E. coli bacteria infiltrated the lake earlier this year, and thousands of dead fish were seen on its banks. That’s the reality on the ground. Not the polished civic image, not the brochure version of Adelaide’s centrepiece. Singer-songwriter and local resident John Schumann said the lake’s condition is what pushed him to call for a trial of nanobubble technology. "It's supposed to be the centrepiece of Adelaide, and it doesn't have to be like this, and that's my frustration," Mr Schumann said. "I live nearby and I use the path around the lake and through the parklands. I am aware, painfully aware, that this lake is a disgrace."
His submission asks the Adelaide City Council to test the technology in the lake. That request comes from people who actually live with the consequences of the closures, not from the layers of management that keep issuing statements while access stays shut.
What They're Calling a Fix
Nanobubble technology generates microscopic bubbles using gases like oxygen and ozone, then mixes them throughout water bodies to help break down chemical contaminants and reduce microbial growth. Dr Arash Zamyadi, a senior lecturer of Civil and Environmental Engineering at Monash University who researches nanobubble technology in Australia, said, "We use a really, really low amount of energy to diffuse the solution, which is the nanobubble." He said, "That has the capacity to break down the contaminants, both the microbes, the pathogens, and the chemicals like the toxins."
The technology was recently used in a year-long trial by Wagga Wagga City Council in NSW to remediate Lake Albert. It was also put forward by Council Charles Sturt to tackle algae in West Lakes last year, but SA Water and the state's Environmental Protection Authority opposed it because of a lack of scientific evidence and uncertainty about its impact on wildlife. Dr Zamyadi said he understood authorities' hesitation and called it a very new, innovative technology that needs more feasibility studies and understanding of its performance. He said, "When you look at the case of Lake Albert in Wagga Wagga, there was no report of loss of any other form of aquatic life, it really targets the algal blooms and the associated contaminants."
That’s the familiar script: a problem grows, a trial gets floated, and the institutions with the power to approve or block it demand more proof while the water stays closed. The burden lands on the people who can’t use the lake, the clubs that can’t row, and the operators who can’t run boats.
The People Shut Out
Closures of the Torrens Lake restrict access to rowing clubs and boat operators like Tony Shuman, who operates cruising riverboats. He said, "Let's try something rather than nothing." That’s the bluntest line in the whole dispute. It comes from the people who lose income and access while the machinery of management keeps circling its own caution tape.
The Adelaide City Council said in a statement that it was "in discussions with other councils and government agencies about ways to improve the management of the River Torrens system and catchment area" and that "The proposed nanobubble technology trial is a separate matter which will be discussed by elected members in coming weeks." Deputy Lord Mayor Carmel Noon said she was supportive of the trial and that it was council's responsibility to look after the Torrens Lake. "I'm very adamant that we have a major role here to be able to mitigate this," she said. "So I'm wanting a trial. It would be amazing that we could actually stop the closures of this part of the river that affects so many businesses and livelihoods."
If the trial proceeds, nanobubble technology would be installed between the Torrens Weir and Albert Bridge at Frome Road. Cr Noon said she hopes to expand it further along the river and across multiple council areas if a trial were successful. The whole thing still runs through the same channels of permission, discussion and elected members, even as the closures keep stacking up and the damage keeps landing on ordinary users.
The lake remains closed. The river keeps carrying the cost.