Toxic Algae Hits Popular Masterton Lake

Monday, 10 February 2025, 9:40 pm
Article: Emily Ireland - Local Democracy Reporter

Masterton’s Henley Lake has been closed to recreational users due to high levels of toxic algae.

The lake is home to waka ama, dragon boating, and motorised model boating, but all of this activity will be on hold until the water gets the all clear.

A Masterton District Council spokesperson said yesterday that water testing had confirmed very high concentrations of toxic algae at Henley Lake and the Hinoa Stream inlet.

“Contact with the water may be unsafe and the council has closed the lake for recreational purposes until health warnings are removed,” they said.

Toxic algae is harmful to humans and animals if swallowed or through contact with skin which may occur when swimming or rowing.

Exposure may cause symptoms such as skin rashes, nausea, tummy upset, and tingling or numbness around the mouth or tips of fingers.

If you experience health symptoms after contact with the lake, consult a doctor.

Dogs may also be at risk.

Throughout New Zealand a number of dogs are known to have died after eating toxic algae at the edges of water bodies.

Visitors to the lake should keep dogs out of the water, and away from the edge. If you believe your dog has eaten contaminated material, contact your vet immediately.

Masterton District Council monitored toxic algae weekly at Henley Lake during the summer.

Toxic algae alerts were also in place for the Waingawa River at South Rd in Masterton, as well as for the Ruamāhanga and Waipoua rivers.

Visitors are advised to look at the signs around the water for the most up-to-date information.

– LDR is local body journalism co-funded by RNZ and NZ On Air

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