Freshwater - Frequently Asked Questions

The NIWA-operated National Rivers Water Quality Network (NRWQN) is New Zealand's only national water quality monitoring tool.

Water quality levels are indicated by how well light transmits through water.

There might be values missing from your data, or it contains figures that deviate widely from the mean. In order to compile accurate water quality models, you need data that draws on comprehensive information about water quality.

Glass eels are juvenile forms of eel that begin life in the ocean trenches of the Pacific and migrate hundreds of kilometres to New Zealand.

Reasonable mixing is the amount of pollutant that can be discharged into a mixing zone.

A mixing zone is a designated area of a stream or river into which wastewater is permitted to empty.