According to Colorado Parks and Wildlife, things like warmer temperatures, stagnant waters and nutrients from fertilized lawns have led to a natural algae bloom at Cherry Creek State Park in Aurora.The swim area has been closed for the second time this Summer due to the algae bloom which may be harmful to dogs and humans.The last closure was on July 10 because of elevated levels of cyanobacteria growth. The blooms can become harmful when the cyanobacteria produce toxins.

This blue-green algae will keep the swim area closed until tests provide acceptable conditions for re-opening.

Signs have been posted around the lake and visitors are advised to avoid the water and algae

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