Freshwater

Discharging into a waterway is likely to impact water quality.

NIWA has produced revised safe levels of dissolved oxygen for fish, which will help inform future environmental planning and resource consents and help to keep New Zealand rivers full of healthy fish.

Streams play a key role in the ecosystems of New Zealand’s unique landscape. They feed and link together freshwater sources, maintain good water quality and support habitats that sustain our biodiversity.

Our goal is to bridge the gap between science and the community in the field of freshwater resources, by providing science, technology and resource management services to New Zealand.

The giant kōkopu is a native whitebait species considered rare and vulnerable. NIWA is working with Mahurangi Technical Institute and environmental consultancy Boffa Miskell to test the feasibility of reintroducing giant kōkopu to Nukumea Stream, north of Auckland.

These guides are designed for rapid identification of freshwater flora and fauna for use in biomonitoring.