Clearwater Lake closed due to potentially toxic algae

Clearwater Lake in Ashburton is closed due to a potentially toxic algal bloom.

The algal bloom is caused by increased levels of nitrogen and phosphorus in the basin.

Debs Martin, Regional Conservation Manager for Forest & Bird, was at the lake this week and was appalled by the brown, murky lake water.

“Right now it looks like pea soup and it’s not safe to use. It’s just awful. You should be able to see the depths of the lake, this is how the lake got its name and why fishermen and tourists love it.

“This lake is incredibly important to wildlife, such as diving birds who need to be able to see prey in the water to feed themselves. We have destroyed their only home. Responsible councils must do better.”

The intensification of the land use of cattle and sheep farming over the past 10 years is affecting the biodiversity and recreation of Lake Clearwater and neighboring lakes and wetlands, Martin said.

The area is typically known for wildlife such as Australasian crested grebes and secretive wetland birds such as the bittern, as well as recreational fishing, boating, and windsurfing.

Martin said that neither regional nor district councils are doing enough to protect fresh water.

“There are standards in place and it is being monitored, but after 15 years of not meeting its own standards, the regional council has not taken the necessary actions to stop the intensification and extensive use of fertilizers.”

“They need to act now. We could lose these incredible natural lakes and essential habitats. I am concerned that it is already too late.”