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Water should be blue, not green

Algae blooms broke out in the river last week during the hot weather. Planting rain gardens can help keep the river clean and healthy.

By Greg Seitz | July 25, 2011 | 2 minute read

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During a spell of hot weather like much of the St. Croix River area experienced last week, the river is a the perfect place to cool off. Unfortunately, it’s just the kind of weather that can also make the water unappealing for swimming.

Jennifer Brigham shared the photo below of an algae bloom in St. Mary’s Point, Minnesota on July 18, caused by excess phosphorus in the water and the hot weather.

St. Mary's Point algae bloom on the St. Croix River

St. Mary's Point algae bloom, photo by Jennifer Brigham

Not only does algae make the water unwelcoming for swimmers, excess algae also consumes oxygen, potentially killing fish. Phosphorus comes from runoff through storm sewers from yards, streets and fields, carrying material including fertilizer and grass clippings.

You can help keep the river clean by planting for clean water. Check out the “Save the Fish … Them Eat ‘Em” page for information about planting rain gardens and other steps.

Save the Fish ... Then Eat 'Em!

Sign up for the e-mail list and you could win fishing gear from Bearz Sports, a guided fishing trip from Croixsippi Guide Service, a tour for 10 of Lift Bridge Brewery in Stillwater, kayak paddles from Bending Branches, and more.

Conservation news on St. Croix 360 is supported by the St. Croix River Association, which works to protect, restore and celebrate the St. Croix River and its watershed.

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St. Croix 360 builds support for river stewardship, and connects people and organizations. It is an independent news source produced by Greg Seitz, with past support from the St. Croix River Association.

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Story of 360

One of the biggest challenges facing the St. Croix River is harmful blooms of algae in in the lower river, due to excess nutrients in runoff. The goal is to restore the river by reducing phosphorus levels to 360 tons/year. Learn more »

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