Lake Taharoa is classified as oligotrophic with low levels of nutrients and algae. This lake has consistently low bacteria levels making it suitable for swimming. Lake Taharoa is ranked as having ‘Outstanding’ biodiversity as the lake is very clear and has the deepest recorded submerged vegetation in the North Island. The lake also contains nationally rare bird and fish species as well as fresh water crayfish and crabs. For further information please refer to www.nrc.govt.nz/lakedata.