Two popular lakes near Dunedin are now clear for swimming again.
Blooms of blue-green algae formed in the Tomahawk lagoon in Dunedin and at Lake Waihola south of the city early in December.
Otago Regional Council put up signs warning of the plant called anabaena, which can produce toxins make people ill and kill animals.
The council said tests on Monday show the algae is gone and the water is safe for swimming.
