Freshwater

A range of physical and chemical variables are measured in the NRWQN.

Tuna, or freshwater eels, are the most widespread freshwater fish in New Zealand. This 'living' educational resource summarises a large amount of scientific and technical literature.

Impacts of timber processing activities on water quality and mahinga kai.

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

Smelt have a distinctly forked tail and a strong cucumber smell.

Freshwater eels have an unusual life cycle which sees them travelling between the ocean, estuaries and freshwaters.

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

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

One of the most common species of freshwater fish in Aotearoa is the common bully or toitoi.

Wastewater treatment is the separation and extraction of solid waste from liquid waste, and the removal of nutrients and pathogens.

The WASH Koro project Mobilising community-led water supply, sanitation and hygiene improvements in Fijian villages is a collaborative participatory project that aims to provide self-help tools to mobilise communities to recognise and address their own water supply, sanitation and health/hygiene needs.