12/08/2026
HOW HEALTHY IS THE HERBERT RIVER CATCHMENT- from the southern Tablelands to the Ingham region and the ocean?
Our southernmost catchment kept a grading of ‘good’ in this year's Wet Tropics Waterways Report Card, despite major flood impacts.
During the reporting period - July 2024 to June 2025 - the Herbert had intense rainfall and flooding from a tropical low. This led to big flood plumes, carrying more sediment and nutrients into inshore coastal waters, which reduced salinity and affected the condition of corals.
Key results in this year's report include:
💧 Water quality remained ‘good’.
💧 Pesticide risk remained low and was graded ‘good’.
💧 Dissolved inorganic nitrogen (DIN) levels remained ‘moderate’ for the second consecutive year, following an improvement from ‘poor’ in 2023–24.
💧 Wetland extent remained ‘very poor’ with a further two hectares of wetland habitat lost since 2019.
💧 In the Hinchinbrook Channel, levels of chlorophyll-a — an indicator of algae in the water — continue to be ‘poor’. This is an emerging issue across several Wet Tropics catchments, and the cause is still being investigated.
While the Herbert catchment continues to show resilience, it is critical for the long-term health of its rivers and estuaries and the Great Barrier Reef that we all keep working to better protect and restore wetlands, improve water quality and reduce nutrient runoff.
To find out more about how waterway health has been changing in the Herbert catchment over the past 11 years, visit the Wet Tropic Waterways website at: https://wettropicswaterways.org.au/herbert-basin/
Terrain NRM is a member of Wet Tropic Waterways - a partnership of 20+ organisations across industry, research, government, the business sector and community conservation - that are focused on improving the health of our waterways and the quality of water flowing to the Great Barrier Reef.
Department of Climate Change, Energy, the Environment and Water Queensland Environment Hinchinbrook Shire Council CANEGROWERS Herbert River Herbert Cane Productivity Services Ltd Ingham Herberton Business and Tourism Association Inc. Herberton Notice Board Ingham Community Matters Tablelands Regional Council Girringun Aboriginal Corporation