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Infectious substances
Waterways can easily become contaminated by pathogens when effluent is discharged nearby. -
Piharau
Piharau/kanakana are an important mahinga kai species and a prized delicacy for many Māori. -
Water temperature and hydro
How do hydro-electricity activities potentially influence waterway temperatures? -
Aquaculture Activities
Shellfish gathering and farming take place in marine and freshwater environments. -
Chemical contamination
Chemical contaminants are chemicals toxic to plants and animals in waterways. -
What do we measure?
Research ProjectA range of physical and chemical variables are measured in the NRWQN. -
Ecotoxicology services
ServiceNIWA offers a range of standard toxicity tests for both freshwater and marine environments. -
Chemical contamination and wastewater
What are the potential sources of chemical contaminants in wastewaters? -
Dissolved oxygen
Dissolved oxygen (DO) is a relative measure of the amount of oxygen (O2) dissolved in water. -
Altered water flow (hydrology)
Each waterway has its own particular characteristics relating to water flow, velocity, and quantity.
