at Boundary Road and at the hapua (river mouth). The warning follows the finding of exposed and detaching mats of potentially toxic algae (benthic cyanobacteria) at these locations along the river. Warnings also remain in place for the Hakatere/Ashburton River at Hills Road and SH1. People should avoid these areas and animals, particularly dogs, should not be allowed near the water until the health warning has been lifted. Dr Ramon Pink Canterbury Medical Officer of Health, says the algae look like dark brown to black mats and can produce toxins harmful to people and animals. “Exposure may cause skin rashes,