Farmers' groups withhold data from $9m Great Barrier Reef water quality program

The government-funded program was designed to reduce polluted run-off to the reef

Agriculture industry groups have refused to show the Queensland government the results of a government-funded program that aims to improve Great Barrier Reef water quality.

The Queensland Audit Office, in a report to parliament, said the farming industry groups had withheld data about the best management practices program due to "privacy concerns" and that its effectiveness might be "overstated".