The fluoride dosing facility servicing Brisbane's major water treatment plants at Mt Crosby will remain offline until May 2018 due to unexpected delays in the upgrade of the facility.

The Holts Hill Fluoride Dosing Facility provides fluoridation for treated water produced at the Mt Crosby East Bank Water Treatment Plant (WTP) and West Bank WTP, which supply the majority of treated drinking water to Brisbane, Ipswich and Logan.

Acting Seqwater Chief Executive Officer Dan Spiller said Seqwater had originally hoped to have the upgrade work completed by March, however delays in finalising design for the new dosing system had pushed the completion date to May 2018.

Mr Spiller said the improvements being undertaken would allow for the ongoing safe fluoridation of drinking water provided by both plants into the future.

“Until the upgrade can be completed, non-fluoridated drinking water will continue to be provided by both plants,” Mr Spiller said.

"Queensland Health has advised there is no need for the community to take any action as dental health benefits of fluoride are achieved and maintained over many years.

"Queensland Health has advised the extended shutdown of the fluoride dosing facility will have little impact on benefits provided by a fluoridated drinking water supply."

The improvement works will include upgraded monitoring and dosing systems.

For health information on fluoride please visit Queensland Health at

For further information telephone (07) 3247 3000 or email