Seqwater and Redland City Council issued the warning to residents of Karragarra Island, Macleay Island and Lamb Island this morning.
The organisations said they were working closely to resolve the situation.
The notice was precautionary following a break in the bulk water pipeline between North Stradbroke Island and Karragarra Island.
The break meant groundwater may have infiltrated the treated water.
An Seqwater spokesman said it was anticipated it would take at least 12 hours to repair the water infrastructure on Karragarra Island which also supplies Macleay and Lamb Island.
For updates on repair and reconnection of supply visit www.yourseqwater.com.au .
The boil water alert will stay in effect until SEQwater and Redland City Council are confident there is no longer a public health concern.
Regular updates will be provided to affected communities.
Consuming unboiled drinking water could lead to illness, especially for vulnerable people such as those who are very young, elderly or immune compromised.
Anyone concerned about their health can contact 13432584, their local doctor or local hospital.