learn

State and Trend

The State and Trend values are two key measures to analyse the performance of the water quality for a region, catchment or site.

State shows the current state of the water quality and and the trend shows how the water quality is tracking over time e.g. a river may be of average quality and getting better over time or it could be very good and getting worse. 

View a factsheet on calculating water state or on calculating water trend.