Stay away from the water pouring out of Coolangatta Creek onto Kirra Beach.
Signs have been put up around the outlet today, after low-levels of the a toxic chemical called perfluorooctanesulfonic acid (also known as PFAS) were discovered.
It is believed to be coming from The Gold Coast Airport site.
Councillor Gail O'Neill said the signage warned people not to swim or fish in the area, but stressed that the risk to humans was very low.
Cr O'Neill said not many people use the outlet, but that Council had "to be careful and take precautions".
"As the assessments go forward, with us and also with other agencies that are testing for contamination in other areas in southern Gold Coast and the airport sight, we will assess that signage as needed," she said.