Shops are being told to take some bottled water off the shelves after inspectors found they contained high levels of arsenic.
The Food Safety Authority issued a recall notice yesterday.
Hundreds of batches of water from an Irish bottling plant were found to be contaminated with arsenic.
It's mostly own-brand water at at shops and supermarkets which has been affected.
Aldi, Lidl, and Dunnes Stores have been told to take water off the shelf.
So have the convenience stores Spar, Mace, Londis, and Applegreen.
Chippers too will have to clear their fridges, because water bottled for members of the Irish Traditional Italian Chippers Assocation are also contaminated.
Even the "Plane Water" available at airports has been affected.
Arsenic occurs naturally in water - but the levels are strictly monitored by regulators in all water for human consumption.
Retailers are being asked to check the list on the Food Safety Authority's website.
The public is being told not to drink it - and seek medical advice if they feel ill.
Aldi said in a statement: “All of the affected product has been removed from sale at all Aldi Ireland stores.
“Customers should be advised that they will continue to see Comeragh Spring Water for sale in some of our stores. This is because the product in these stores has come from a different Irish supplier and these products are unaffected.
“We apologise for any inconvenience and thank customers for their co-operation.”