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Redesigned iron-enhanced ditch checks could help filter pollutants from stormwater runoff

This article was originally published in Catalyst, April 2020.

The Minnesota Department of Transportation (MnDOT) is exploring innovative ways to filter pollutants from stormwater runoff and meet permit requirements for construction projects. In a recent study, U of M researchers documented the performance of an iron-enhanced ditch check filter to remove phosphates from stormwater. They found that the filter was effective, though its performance decreased over time.

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