Rubbish collection using ecoboats in Rio de Janeiro's Guanabara Bay remains suspended indefinitely, despite next year's Olympics and Paralympics being only 17 months away, insidethegames has been told.
Water pollution remains a major concern for organisers with just 502 days to go until the Games are due to begin.
Sewage and contamination remains the longer-term problem but removing physical debris has been identified as the immediate target.
A meeting took place place earlier this month between International Olympic Committee and International Sailing Federation (ISAF) officials.
But the project has been postponed due to the lack of ecoboats from which the rubbish can be collected.
"At the moment, the ecoboat operation is suspended and it will be readjusted in order to attend the cleaning needs of Guanabara Bay," a spokesman for the Rio State Department of the Environment (SEA), the body responsible for pollution concerns, told insidethegames.
"The ecoboat project will return after it has been optimised and the fleet expanded.
"SEA decided to suspend its operation, because the fleet of 10 ecoboats wasn´t reaching the goal to collect 45 tons of rubbish per month and it also used to cost BRL$300,000 (£62,000/$92,000/€86,000) per month."
Yet, considering how close the Games now are, it appears critical this suspension of activity ends soon.
Some experts have claimed the tight timeline deems cost-related concerns irrelevant.
The spokesman claimed the Department is currently developing a project to install new ecobarriers, with "more robust structures, based on positive experiences around the world".
Several other possible solutions have been suggested, with United States inventor Scott Weiss having sent a letter, seen by insidethegames, to both the ISAF and International Swimming Federation calling for his product, the "Parachute Skimmer" to be used to help clean the water.
The device is a tool that collects floating debris, algae and pollution without using chemicals, Weiss has claimed.
It has been tested and recommended for use by the US Coast Guard and used in the clean-up operation following the Gulf of Mexico oil spill in 2010.
On a smaller level, it is also used by pond maintenance experts, waterparks, marinas, resorts and hotels to remove debris and algae.
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March 2015: Exclusive: Rio 2016 clean-up operation at Guanabara Bay hampered by lack of boats
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