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Water test results
Water and Macroinvertebrate testing is carried out across 27 locations across the Coomera and Nerang River Catchment. These tests help ascertain the health of the river system.
Read more about the Coomera River Catchment Association’s testing and the history behind it here.

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May 2026: Chemical, Water Quality and Macroinvertebrate Analysis
Hi everyone Please find attached the Water Quality Monitoring results for May 2026. The following notes are offered for your consideration: Water temperatures are slowly dropping, reflecting the extended summer weather we have been experiencing; the readings in the Coomera River being amongst the lowest Dissolved Oxygen levels are good, reflecting the amount of rainfall experienced during the month – good new for water dependent animals Oxidation Reduction Potential (ORP) re
Alison Loxton
5 days ago1 min read


April 2026: Chemical, Water Quality and Macroinvertebrate Analysis
Hi everyone Trust you are enjoying the mild weather. Please find attached the results of our Water Quality Monitoring efforts for the month of April, 2026. Many thanks to Kim, Helen and Brian for their assistance. In respect of the results the following notes are provided: There is now a noticeable difference between freshwater and saltwater temperatures – from around 20 degrees in the freshwater and around 25 degrees in the saltwater; this difference will increase as winter
Alison Loxton
May 302 min read


March 2026: Chemical, Water Quality and Macroinvertebrate Analysis
Hi everyone, Please find attached our WQM results for the month of March 2026. No great surprises there, although the water quality in Yaun Creek is quite poor, due no doubt to the excessive pressure placed on that tiny catchment by the proliferation of construction activities. Years ago, we could undertake Macroinvertebrate sampling with reasonable expectations, however that time has finished. Thankfully the majority of rivers and streams are maintaining a reasonable quality
Alison Loxton
Apr 272 min read


February 2026: Chemical, Water Quality and Macroinvertebrate Analysis
Hi everyone I trust you are all keeping as well as you can and enjoying life and good health. Please find attached the results of our Water Quality Monitoring for the month of February, 2026. As this is saltwater month plus Waterhen Lake, we examined water quality in the saltwater sections of the Coomera River. Points of interest are as follows: Salinity is about average with salinity reducing as progress upstream – salinity at Paradise Point is about 34 parts per thousand (p
Alison Loxton
Apr 62 min read
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