The health warning that was placed in late August 2023 at Lake Rotoroa, has been lifted for recreational activities other than swimming with tests showing only low cyanotoxin levels.
People using the lake are advised to avoid any scum.
Dr Richard Wall, Te Whatu Ora Medical Officer of Health for Waikato said scums were a particular risk because they were likely to have a higher concentration of cyanobacteria. If contact with scum did occur, skin should be rinsed clean and clothing changed as soon as possible.
Lakes Hakanoa, Whangape, Waikare and Kainui continue to have a cyanobacterial health warning in place.
Cyanobacteria levels are regularly monitored at Lakes Rotoroa, Kainui, Rotokauri, Ngā Roto, Puketirini, Waikare, Whangape, Hakanoa and Waahi.