Water quality in Otago July 2015 to June 2020 [pdf, 1.1 MB]
...sourced from effluent and fertiliser. Ammoniacal nitrogen (NH4-N) can indicate the presence of effluent in water. E. coli: Escherichia coli (E. coli) are a bacterium which is used as an indicator of the presence of harmful micro- organisms in water (e.g. human or animal faeces). This can be used to gauge whether water is suitable for stock drinking, swimming, surfing or other recreational activities. Turbidity: Turbidity is a measure of the cloudiness of water, determined by how much light...