This site is in the middle basin of the Upper Waitematā Harbour. It is adjacent to Christmas Beach on the northern side of the residential Herald Island. The site has been monitored since 2005 and was introduced as part of a network to detect impacts of urban development around the estuary.
Mud content and macrofauna are sampled every three months, and contaminants every six years. Mud content is moderately high whilst contaminant concentrations are low.
Monitored site results
This dashboard shows information on the data collected by the regional councils and unitary authorities for the Estuary health scientific indicators, click the tiles for more information: