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Beautiful view of an Iowa river with a bridge and trees along the banks

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Can heavy rain increase nitrate levels in our water sources? What experts say

Director of IIHR Hydroscience and Engineering Larry Weber says rain acts as a transport mechanism, adding on top of water with increasing nitrate concentrations.
Thursday, April 16, 2026
We Are Iowa
https://www.weareiowa.com/article/weather/iowa-water-nitrate-levels-rain-impact…
The University of Iowa

IIHR—Hydroscience and Engineering

 College of Engineering

100 C. Maxwell Stanley Hydraulics Laboratory
Iowa City, Iowa 52242-1585
Email: iihr@uiowa.edu
Office: 319-335-5237
Fax: 319-335-5238

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