The results come from samples taken from 11 sites covering the Wet Tropics at Cairns down to the Fitzroy region near Yeppoon, which tested for 26 herbicides and pesticides commonly used in agriculture.
The results come from samples taken from 11 sites covering the Wet Tropics at Cairns down to the Fitzroy region near Yeppoon, which tested for 26 herbicides and pesticides commonly used in agriculture. Iain Curry

Mackay, Whitsunday rivers top list for herbicide pollution

New data shows Mackay Whitsunday region rivers have the worst herbicide pollution throughout northern and central Queensland.

The results come from samples taken from 11 sites covering the Wet Tropics at Cairns down to the Fitzroy region near Yeppoon, which tested for 26 herbicides and pesticides commonly used in agriculture.

Repulse Bay, between Conway Beach and Midge Point, ranked in the highest percentiles for nine types of herbicides while Flat Top Island, not far off East Mackay, was in the highest percentiles for seven varieties - both topping the list for diuron.

"In line with previous monitoring years, diuron, atrazine and hexazinone were the most frequently detected and abundant of the pesticides at most sites, reflecting their high usage in sugar cane cultivation, which is located along much of the Great Barrier Reef coastline," the report by the Great Barrier Reef Marine Park Authority stated.

More stories:

The tragic toxins found in our turtles

Push to 'move mountains' to fix reef's critical diagnosis

MASS FISH KILL: Nutrient cocktail leads to second wave

But a Griffith University and WWF study said the water quality check, which tracked about 30 pollutants across 11 out of the 35 catchments flowing into the Great Barrier Reef, fell short on detecting the full spectrum of chemicals.

"Criteria are too narrow and do not include many commonly used chemicals, such as antifouling paint, plasticisers, flame retardants, hydrocarbons (from fuels), UV filters in sunscreens, pharmaceuticals and personal care products," the study said.

Subscriber benefits:

Your questions about the new Daily Mercury format answered

How to make the most of your Mercury subscription

"The more chemicals we look for in GBR habitats, the more we find - indicating that routine water quality monitoring programs are only detecting "the tip of the iceberg" in terms of chemical pollution on the reef.

"With more than 150,000 chemicals in production and use in Australia and over 40,000 chemicals globally identified as contaminants of emerging concern, much more research is needed."

Share your thoughts on this issue through a letter to the editor:

Daily Mercury

Whitsunday Times



LETTERS TO THE EDITOR: Why is sports the top priority?

Premium Content LETTERS TO THE EDITOR: Why is sports the top priority?

Harry Bruce’s cartoon of the day and readers have their say on current events.

Lauga labels Rockhampton BOM automation ‘shameful’

Premium Content Lauga labels Rockhampton BOM automation ‘shameful’

Keppel MP calls for reversal of planned Rockhampton BOM automation, but Federal...

Legendary CQ weather forecaster reacts to Rocky BOM cuts

Premium Content Legendary CQ weather forecaster reacts to Rocky BOM cuts

Peter Byrne speaks out: “This whole saga is unacceptable. The contraction of...