The Ashburton District Council says an algae in part of Ashburton River is no longer at toxic levels.
In December, testing near the Ashburton River bridge on State Highway One found increased levels of cyanobacteria.
The council said latest testing showed the algae was below the alert level.
It said the area was now safe for dogs, but the water quality was still not suitable for people swimming.
The Canterbury District Health Board is warning people to stay out of the Ashburton River because potentially toxic blue-green algae have been found in it. The Canterbury District Health Board...
People are being told to stay out of Lake Whangape, near Huntly, because of harmful bacteria levels being double what they should be.
A health warning has been issued for a fifth lake in north Waikato, following the discovery of high levels of toxin.
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