Queensland Natural Resources Minister Stephen Robertson has blasted SEQ Water for its role in a fluoride overdose in water supplies, north of Brisbane.

After initial confusion about the date, suburbs and dosage involved, the State Government confirmed the contamination happened in April, with up to 400 homes affected in the suburb of Joyner, as well as 200 children at a school camp.

Premier Anna Bligh ordered an independent report to find out what caused a malfunction at the North Pine water treatment plant.

The independent report has found the fluoride overdose was caused by equipment failures to which the operators did not respond appropriately and recommends more training for staff.

Queensland Natural Resources Minister Stephen Robertson says he has put SEQ Water on notice that he will not tolerate another fluoride bungle.

“I’ve expressed to them in the strongest possible terms my expectation that this incident will not be treated lightly,” he said.

“But I’ve also indicated to them that should a repeat of such an episode again, I will not hesitate in removing the board.”

He says it is unacceptable that water safety legislation has been breached.

“I have spoken directly to the chair of SEQ Water indicating to them my very strong displeasure,” he said.

“I have expressed in very strong terms that I find this unacceptable and that my expectation is that the board will take appropriate action against those found to be responsible.”

The fluoride facility will be closed until at least September while repairs are made.