UPDATE 06/05/2019 - Tukituki River and Waipawa River - these are receding and exposing potentially toxic black mat algae on the river bed edges.
Black mat algae has been seen at the Waipawa River and Tukituki River @ Walker Road, and at places on the Tukituki River @Patangata, @Red Bridge and @Tennant Rd.
People are advised not to swim and dog walkers are advised to take extra care to keep their pets under control when walking them in the river bed, as the algae may be toxic.
Hawke's Bay DHB staff have posted warning signs at these locations.
Dog owners - here's our advice leaflet so you know what to look for: https://www.hbrc.govt.nz/…/Dog-owners-guide-to-algae-in-riv…