Killarney Lake is overcome with toxic blue green algae blooms and the mayor is red with anger over the province's inaction on addressing the problem.

Rick Pauls, mayor of the municipality of Killarney–Turtle Mountain, said 20 years ago it used to be tough to find a spot on the beach.

Now, the only ones on the beach are paid lifeguards.

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A close up of Killarney Lake last summer. (Courtesy Graham Brown)

The lake is quickly becoming one of the worst in the province. His community can't enjoy it and it's putting a major damper on tourism, Pauls said.

"It's embarrassing because our town is built around the lake. It's not that we have a lake near to us  — our town is built around this body of water," he said.

He wants the sludge cleaned up but the lake is under provincial jurisdication and the government is doing nothing about it.

Pauls said he can't wait any longer for the province to step in.

"Basically what we're saying is if they don't do something were going to take an action of civil disobediance and we're going to go and we're just going to treat the lake ourselves in the best way that we see … because at the end of the day we're the ones living with it," he said.

Pauls said he's considering blue-stoning the lake — a copper-sulfate treatment that is illegal in Canada.

But Pauls said inaction is worse.

"We are prepared to take action and they're going to have to stop us. We're not asking for permission anymore. We're going to ask for foregiveness," he said.

"At the end of the day our lake is going to get fixed."