There are two species of kōura or freshwater crayfish in Aotearoa.

Waterways can easily become contaminated by pathogens when effluent is discharged nearby.

Methane (CH4) is the second most important greenhouse gas after CO2 that is produced by human activities.

The Statement of Core Purpose spells out why the Government owns Crown Research Institutes and what it expects from them.

As much of this climate zone is sheltered by high country to the west, south and in some areas to the east, it is the sunniest region of New Zealand.

The world’s oceans are acidifying as a result of the carbon dioxide (CO2) generated by humanity.

NIWA collects wave data, develops and verifies wave forecasting systems, and is developing and producing wave projections.

The Standardised Precipitation Index (SPI) is a simple measure of drought (and also of very wet conditions) and is based solely on the accumulated precipitation for a given time period.

Monthly climate summaries from December 2001 to the present.

NIWA's educational resources and scientific data are tools for young people to learn about science.

This system combines daily sea-level data from NIWA, regional councils, port companies, Antarctica NZ, Bureau of Meteorology and territorial authorities.

Blooms of hazardous cyanobacteria (blue-green algae) in rivers, lakes and reservoirs can cause problems for both animal and human health.