Rural, urban, and suburban wastewater treatment methods.

An estuary is a partially enclosed body of water formed where freshwater from the land meets and mixes with saltwater from the ocean.

The majority of New Zealanders are able to recall a story about catching eels when they were children.

More information about our online freshwater databases.

Pauanui South Cam-era station

NIWA collects and manages significant amounts of New Zealand's environmental data, particularly in the climate, freshwater, marine and atmosphere domains.

Understanding what happens above and below ground during a flooding event, and how it is different from normal rainfall conditions

NIWA offers a range of standard toxicity tests for both freshwater and marine environments.

Forest plantations in Aotearoa can be found on flat, gently rolling, or very steep terrain.

Understanding how hazards impact people and the environment provides the foundation for informed decision making for a resilient Pacific.

Our southwest Pacific research focuses on recent and historic climate and weather activity, including our involvement in ACRE Pacific data rescue.

Read about how NIWA can map any aspect of climate to help guide your organisation's response to a changing and variable climate.