21 Feb 2020: Toxic algae in Wellington region update

Toxic algae is again on the increase across the region. The main rivers of concern are the Otaki and Waikanae (Kapiti Coast) and Waingawa (Masterton). Rain is predicted for the Kapiti coast this weekend, hopefully it is heavy enough to flush the Otaki and Waikanae rivers.

Current warnings  

  • Otaki, up to 40% toxic algae in places. Current warning which extends from Hautere to the river mouth remains in place. Predicted rain is likely to flush this river over the weekend.
  • Waikanae, 30% cover and detached mats present in the JCP area. Current warning remains in place.
  • Hutt River, 25% toxic algae at Silverstream. Current warning which extends from the Trentham / moonshine bridge to Pomare train bridge (just upstream of Taita Rock) remains in place. Elsewhere in the Hutt River toxic algae is on the rise but still under guideline levels.
  • Waingawa, 40% toxic algae cover. Toxic algae has come back quick after being flushed two week ago – a new warning has been put in place.
  • Waipoua, 20% toxic algae cover. Current warning remains in place.  


Key messages:

  • We recommend you avoid swimming and keep dogs away from these rivers at this time. The best thing you can do to stay safe is to know what toxic algae looks like and avoid it.
  • Search ‘Is it safe to Swim’ for the latest toxic algae updates.