A study from USGS shows nutrient pollution in U.S. rivers can spend a season or longer on the landscape before it reaches a stream. Pictured is the Mississippi River along Dubuque. (Photo by Perry Beeman/Iowa Capital Dispatch)
New modeling from the U.S. Geological Survey shows nutrient loads in rivers across the nation increased between 2000 and 2020, largely due to nutrients stored in the…
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https://iowacapitaldispatch.com/2026/07/21/us-geological-survey-study-shows-rising-nutrient-loads-in-rivers/
https://iowacapitaldispatch.com/2026/07/21/us-geological-survey-study-shows-rising-nutrient-loads-in-rivers/
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