Wetland project aims to reduce nutrient flow to Des Moines


Storm Lake, Iowa constructed a wetland to help curb flooding and reduce nutrient flow into the Raccoon River. (flickr/Ravenblack7575)

Katelyn Weisbrod | August 15, 2017

Storm Lake, Iowa has completed a project to improve its water quality. Eight more projects are in the works to continue this effort.

Storm Lake, in Buena Vista County, was one of several communities involved in the Des Moines Water Works lawsuit in January. The water utility attempted to sue Buena Vista county and two other northern Iowa counties for allowing nitrate pollution in the water, which flows downstream to the Des Moines area. The Iowa Supreme Court did not side with the water utility, but the lawsuit brought attention to the issue, and Storm Lake is addressing it.

In May, the community constructed a $175,000 wetland, and last week, Iowa Gov. Kim Reynolds and Lt. Gov. Adam Gregg joined Storm Lake leaders in celebrating the step towards healthier water.

“Storm Lake has been very active over the past several years in working with storm water to improve water quality and to slow down the flow to reduce flooding in our neighborhoods, as well as reduce the nutrient loading that’s in the water,” Jon Kruse, mayor of Storm Lake, said to KWWL.

The wetland naturally removes nutrients from the water, reducing the amount of nitrogen and phosphorous flowing down the Raccoon River to Des Moines, and to the Mississippi River into the Gulf of Mexico. Nutrient removal from water can be complicated, and high levels of nutrients can cause algal blooms in water bodies, leading to low oxygen levels which are dangerous for aquatic life. Storm Lake has also had issues with flooding in the past, and this wetland should help reduce that.

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