Freshwater quality

What are the potential sources of nutrients from urbanisation?

What are the potential sources of nutrients from horticultural activities?

How may horticultural activities increase sediments in waterways?

What are the potential sources of nutrients from agricultural activities?

This project was undertaken for Auckland Regional Council to identify significant sources of contaminants in the central Waitemata and southeastern Manukau Harbours.

Simple steps to minimise the effects of chemical contamination on water quality and mahinga kai.

Here are some simple steps to minimise the effects of nutrient overloading on water quality and mahinga kai.

Simple steps to minimise the effects of infectious substances on water quality and mahinga kai.

Here are some simple steps to minimise the effects of sediment on water quality and mahinga kai.

Learn about the Resource Management Act, Resource Consents, and how to prepare a submission.

A regular newsletter that includes a seasonal review and outlook for New Zealand's water resources, and an update on some of NIWA's freshwater research.

Learn more about aquatic plants.