The Overview of the Guidelines, found on the Environment Australia website, is a good place to start if you are unfamiliar with their extent and application, both in Australia and New Zealand.
This document updates the 1992 ANZECC Water Quality Guidelines and has been modified to take the New Zealand context into consideration. Specifically, this document:
Aquatic ecosystems vary considerably within and between tropical and temperate zones. The Water Quality Guidelines provide guidelines for biological and physico-chemical indicators of water and sediment quality that will protect the ecological health of aquatic ecosystems, both freshwater and marine.
The Water Quality Guidelines can be used at a broad level to help define water quality objectives for catchments where irrigation use is prevalent. They can also help individual irrigators assess the suitability of water for their uses, and possible mitigation measures to reduce any impacts.
In some regions of New Zealand groundwater is increasingly relied upon (in addition to surface water) for stockwater and irrigation. So the guidelines provided in the Water Quality Guidelines for the livestock and irrigation industries are applicable (where appropriate) to both surface water and groundwater quality.
Last updated: 24 April 2012