Shot 07/01/2011.## There’s growing concern tonight over swimming in parts of Grand Lake. Blue green algae has been confirmed in certain areas, including Bernice State Park.  The Grand River Dam Authority and the Department of Environmental Quality are holding a news conference tomorrow. They'll have results from testing they've been doing the past several days. While most blue green algae are not toxic, toxins can be produced in some algae blooms and you're urged to avoid body contact. That means no swimming or wading.##