Maps of average annual rainfall, temperature and other climate variables have been produced for all of New Zealand, based on the period 1981–2010.

Find out more about working at NIWA

NIWA discusses, in depth, this year's most asked question—what is happening to our fresh waterways?

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.

Accurate reporting on the amount of fish and invertebrates that are caught and discarded by New Zealand’s commercial fishing industry is vital to effective management of these fisheries.

Dog Island levels

Where and when do white sharks occur in New Zealand waters, and how can fisheries bycatch be reduced?

Various industries and land use activities have the potential to impact on water quality and mahinga kai unless properly managed.

Once in freshwater, glass eels develop into darker pigmented juvenile eels known as elvers.

NIWA provides ambient air quality monitoring services using low-cost ODIN (Outdoor Dust Information Node) sensors.

A carbon neutral activity is one that has a carbon footprint of zero.