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Cyanobacteria mats are now approaching significant levels in areas of the lower Maitai. As a precautionary approach dog owners should not allow their dogs to swim in any areas of the Maitai, or drink from the river, where cyanobacteria is present until advised otherwise.

Nelson City Council will have signage to this effect at the main swimming holes.

Read more about how scientists are responding to cyanobacteria here. Or visit Nelson City Council's website for more information