Deputy Mayor Anoulack Chanthivong said the warmer weather provides ideal breeding grounds for phosphate blooms.

With more people outside and using the river rubbish and waste can also find its way into the water system.

``During the summer, materials build up and waste washes to the far bank,'' Cr Chanthivong said.

``It's about us taking a proactive approach so we know where it's likely to spread so the actions we take are more strategic. We're going where it most grows and finding out more about the way it changes over time.''

The council will monitor water levels and quality, including mapping trends over five years.

``As much as we would like to eliminate these things there are things in everyday life that impacts the quality,'' he said. ``We're taking a very proactive stance on reducing waste from getting out of control.

``People should not be dumping stuff, it's really about trying to keep a clean environment, what goes down in the drain goes into our rivers.''