Monitoring the different variables that affect water quality is carried out monthly. This involves the assessment of water, and concentration, , and the concentration of the bacteria Escherichia coli (E. coli). The classifies the site based on the number of and different types of living there and is measured annually.
Overall, water quality is generally good at this site. This is a reflection of the surrounding land cover (which is dominated byforest) and the fact that it is hard-bottomed, (made up of cobbles and gravel). In contrast, sites that have poor water quality tend to be soft-bottomed, meaning that the stream or riverbed is sandy or silty, and surrounded by pastoral or urban land.
For more information on Greater Wellington Regional Council's environmental monitoring programmes, check out the latest water quality reports.