River Lake has been working with Bay of Plenty Regional Council to complete a report on the state and trends of water quality in Bay of Plenty rivers.

Over the ten year period 2009 to 2018 the Bay of Plenty river monitoring sites have shown overall worsening trends for total phosphorus (TP), dissolved reactive phosphorus (DRP) and nitrate (NNN); but overall improving trends for absorbance (A440), total ammonia (NH4-N) and electrical conductivity.

The trend results are shown in the graphs below:

The full report can be downloaded from here: