Why was the river foaming?
DOES anyone have any idea what could have caused the Mary River to foam at the weekend?
It appeared to residents as if a bottle of detergent had been dumped down a stormwater drain.
Gympie Regional Council's health department was yesterday investigating the cause however, it was still a mystery, having since disappeared.
It was an unusual sight, captured by freelance photographer David Crossley.
Thick white foam scum covered parts of the river downstream from the weir near Kidd Bridge.
Cameraman Greg Forward said scientists from the Environment Protection Agency were believed to have taken a sample of it on Saturday afternoon, but the cause was still unknown yesterday afternoon.
The council's health department was notified yesterday but were yet to figure it out also.
Mr Forward said it was possible that the foam was the result of a practical joke - caused by someone pouring detergent into a drain.
Others said it may have been the rain flushing out something in the drains.
The Gympie Times is asking readers with information on what caused the river to foam, to contact the editorial team on 5480 4221.