Atmospheric analysis

What are the potential sources of chemical contamination from agricultural activities?

A handful of species we work on

A collection of ID guides to algae. Groups include major freshwater algal groups, diatoms and blue-green (cyanobacteria), red and green algae.

Water take (also known as water abstraction) has a range of valuable public and private uses.

When fresh water meets salty water - a classroom exercise that explores the physics of estuaries.

The topography of the North Island has a profound effect on the weather of the Bay of Plenty region.

In comparison with regions exposed to the west, Gisborne experiences a greater number of weather and climatic extremes.

Here is our complete range of products.

View annual, seasonal and monthly summaries of temperature, rainfall and sunshine data from across New Zealand.

NIWA's High Intensity Rainfall Design System (HIRDS) offers planners and engineers more certainty about the frequency of high-intensity rainfall events, enabling them to better design stormwater drainage, flood defence systems and other vital structures.

To prepare for changes in climate, our freshwater and oceans decision-makers need information on species vulnerability to climate change.