Estuary Health


  Very Good   Good   Fair   Poor   Very Poor


Estuaries are important natural places that sustain key aquatic species and, provide good habitat and cultural, social, economic and ecological services that are important to a region. Estuaries managed in sustainable ways, they support a variety of ongoing economic benefits to communities and industry.

The map shows daily health/condition scores that have been calculated based on daily chlororophyll-a and turbidity data that is compared to baseline conditions/levels for each site. This information is then compared to trigger values (80th percentile of all data available for reference estuaries as defined by the Department of Planning, Industry & Environment, DPIE, Environment, Energy and Science*) are calculated to highlight when an indicator is outside the expected range. The level of compliance against the trigger values are reported based on the level and frequency of exceedance. Results showing poor grades will trigger further investigation or a management action. For information on the analysis used to calculate the estuarine health scores/grades, please refer to DPIE guidelines and protocols*.

Latest Estuary Health Grades

Grade % in the Last 12 Months
Location Latest Grade Very Good Good Fair Poor Very Poor
Bar Island  Fair 01 Oct 2020 0 5 87 5 3
Calabash Bay  Fair 01 Oct 2020 2 2 32 37 27
Courangra Point  Fair 01 Oct 2020 0 19 55 17 8
Gunyah Point  Fair 01 Oct 2020 1 34 58 2 5
Laughtondale  Poor 01 Oct 2020 0 2 39 38 21

Report card grades, definitions and descriptions (from NSW OEH, 2013)*

GradeResultDefinition (example)Description
Very GoodThe indicators measured meet all of the benchmark values for almost all of the time period.Equivalent to the best 20% of scores in the state
GoodThe indicators measured meet all of the benchmark values for most of the time period.Equivalent to the next 30% of good scores
FairThe indicators measured meet some of the benchmark values for some of the time period.Equivalent to the middle 30% of scores
PoorThe indicators measured meet few of the benchmark values for some of the time period.Equivalent to the next 15% of poorer scores
Very PoorThe indicators measured meet none of the benchmark values for almost all of the time period.Equivalent to the worst 5% of scores in the state