Bottled water will be provided to students at five new West Australian schools after elevated lead levels were detected in water at five other campuses.

Education Minister Sue Ellery has insisted there is no risk to students, saying none of the taps where the elevated lead levels were discovered were used to provide drinking water.

But she said bottled water would be provided as a precaution to students at schools still awaiting test results for lead levels.

Schools tested for lead in water Aspiri Primary School — one tap in gardener's store showing inconsistent results

— one tap in gardener's store showing inconsistent results Yanchep Secondary College — one work sink showing inconsistent results

— one work sink showing inconsistent results Oakwood Primary School — one external hose tap showing inconsistent results

— one external hose tap showing inconsistent results Wellard Primary School — three activity sinks showing inconsistent results

— three activity sinks showing inconsistent results Honeywood Primary School — four activity sinks showing inconsistent results

— four activity sinks showing inconsistent results Rapids Landing Primary School —awaiting results

—awaiting results Aveley North Primary School — awaiting results

— awaiting results Aveley Secondary College — awaiting results

— awaiting results Doubleview Primary School — awaiting results

— awaiting results Southern Grove Primary School — awaiting results

It is not clear when that testing will be finished.

The Department of Education said the tests had shown "inconsistent results" from taps or sinks at Aspiri Primary School, Yanchep Secondary College, Oakwood Primary School, Wellard Primary School and Honeywood Primary School.

It said it was awaiting results from Rapids Landing Primary School, Aveley North Primary School, Aveley Secondary College, Doubleview Primary School and Southern Grove Primary School, where bottled water will be provided to students.

Fremantle College was given the all-clear.

The Minister earlier said bottled water would be given to all 11 new schools before her office later issued a clarification.

Parents at the affected schools were informed of the problem this morning.

Education Department director general Sharyn O'Neill said parents did not need to panic.

"There was no issue with the drinking fountains but we're taking precautions where we had some concerns over other outlets," she said.

"I'd rather be criticised for being over-cautious than for being flippant on this issue.

"We are taking every measure possible to give [parents] comfort and I think that's a common sense thing to do."

The Minister defended the fact parents had not been informed sooner, saying she was only made aware of the issue late yesterday.

But she said she was angry she was not told earlier and that the testing was not completed in time.

"Frankly I was given a timeline last week and that was not met," Ms Ellery said.

Ms Ellery said she could not give a timeline for the completion of further testing.

"We will make information available in update form as it becomes available to me," she said.

Testing in wake of hospital lead scare

The testing regime was implemented in the wake of ongoing lead problems at Perth Children's Hospital, which is now years behind schedule.

The Children's Hospital issue also led the Government to institute flushing of school water systems before the recommencement of each academic year, to minimise the risk of elevated lead levels.

The school lead issue is the latest problem to plague the McGowan Government in the education portfolio, after heavy backlash to its plans to close the Schools of the Air led to that decision being reversed.