THE Tamar Yacht Club has suspended all after- school sailing programs due to the Tamar River's inconsistent water quality readings.
Club treasurer Ed Vincent said the club had contended with high eColi readings over the past few years, which he believed had led to illness for some sailing class participants.
"The water quality issue is such that we can't run dinghy sailing programs at the clubhouse in Park Street," he said.
"We don't know what water quality will be like at any one time so we can't, with any confidence, schedule the after-school sailing programs."
Mr Vincent said there would be no resolution until the city's combined sewerage and stormwater issues were fixed.
"Until then, we can't ensure a safe sailing experience," he said.
A TasWater spokeswoman said the body was working with the Launceston Flood Authority and the Launceston City Council on the issue.
She said the three parties were looking into short and medium- term solutions, particularly for the combined system.
The federal government has committed $3 million over three years to clean up the Tamar with the first $1 million to be delivered in July.