It comes after samples were taken by Environmental Health at the outfall at the southern end of the bay. Seawater samples that were taken show that these results relate purely to the outfall, said a spokesman from the department. 

"Environmental Health have undertaken extensive investigations upstream and in nearby roads to try to track the source of pollution and nearby landowners have been contacted and provided information in relation to land use."

Pictured: Beachgoers using Cobo Bay were told to avoid direct contact with water from the outfall between Route de Cobo and the slipway adjacent to the kiosk back in September. 

There is no conclusive information to identify the source of the problem, the spokesman added.

People are generally advised against allowing children to play in water from any beach outfall, given it may carry run-off from fields with grazing livestock or debris from roads.