Atmospheric analysis

Glass eels (about 5.5 to 7.0 cm) arrive in fresh water during spring, especially during September and October, although they may be present from July to December.

References, further reading, and links to useful websites.

When soils erode, sediments are washed into waterways.

The seafood counter at your local supermarket has changed.

The climate of this area is greatly dependent on its exposure to weather systems from the Tasman Sea and the lie of the Southern Alps to the east.

What are the sources of chemical contamination from wood processing?

NIWA has transformed 1.5 million square kilometres of data into the most accurate and detailed map yet of the land underneath the sea around New Zealand.

Follow NIWA's scientists as they explore the natural world, make new discoveries and share how people use their science.

Information about climate and weather and links to climate-related websites.

Waikato exhibits a range of climates due to the variety of landscapes in the region.

NIWA's Hydro Web Portal provides river flow and water quality monitoring data from NIWA’s Benchmark river monitoring network.

NIWA collects a vast range of environmental information about New Zealand’s environment from the sky to the seafloor.