Is it safe to swim?
Click on a site on the map below to find out its overall water quality grade and current water quality or toxic algae warnings.
An amber alert toxic algae alert is in place at the following sites:
Toxic algae levels are elevated but it is still safe to use the river. Avoid obvious mats of algae (especially any that may have washed up at the river's edge). We recommend keeping your dog on a lead. More about toxic algae.
A red alert warning for toxic algae is in place at Henley Lake in Masterton. Contact Masterton District Council on 06 370 6245 for more information or see http://www.mstn.govt.nz/events/latest/images/algiedechigh.jpg.
A red alert warning for toxic algae is in place at Lower Whitby Lake in Porirua. Contact Porirua City Council on 04 237 5089 for more information.