Atmospheric analysis

How healthy is your stream? SHMAK - the New Zealand Stream Health Monitoring and Assessment Kit - has been designed to help you find out.

One of the most common species of freshwater fish in Aotearoa is the common bully or toitoi.

View a collection of maps showing the impact of past El Niño and La Niña events.

Technical information about our datasets and methodology along with related resources.

New Zealand rushes (Juncus): species-level factsheets.

Providing educational resources to school students and teachers is part of NIWA's commitment to helping young New Zealanders discover more about science and technology.

Sheltered by high country to the west, the eastern zone of the North Island enjoys a dry, sunny climate.

Generally speaking, a drought is defined as a rainfall deficit which restricts or prevents a human activity – for example, farming or power generation.

Projections of how climate change is likely to affect New Zealand.

In this blog series, we feature a new critter from our expansive invertebrate collection including pictures of specimens in their unique habitat. The blogs also feature news, links and fun facts that showcase New Zealand’s fascinating marine fauna.

Wastewater treatment is the separation and extraction of solid waste from liquid waste, and the removal of nutrients and pathogens.