Freshwater quality

How may forestry activities increase sediments in waterways?

References, further reading, and links to useful websites.

How can mining activities influence sediments in waterways?

Has a receding lower jaw and black spots behind the head.

How does urbanisation increase sediments in waterways?

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

Blooms of hazardous cyanobacteria (blue-green algae) in rivers, lakes and reservoirs can cause problems for both animal and human health.

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

How do nutrients from wastewater treatment enter waterways?

How healthy is your stream? SHMAK - the New Zealand Stream Health Monitoring and Assessment Kit - has been designed to help you find out.

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