Environment Southland has detected toxic algae in the Upukerora River at Te Anau Milford Highway, prompting a health warning for water users.The regional council's monitoring team discovered the harmful algae during routine observations. Officials warn that similar algae growth may be occurring in other waterways across Southland.Toxic algae appear as dark green or brown slime on rocks, or dark brown and black mats at the water's edge. While mos…
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