Iowa's Rivers and Lakes Struggle with Recurring Impairment

Many waterways see brief improvements, but often fall back into impaired status.

Published on Feb. 8, 2026

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An investigation has found that many of Iowa's rivers and lakes experience cycles of brief water quality improvements followed by a return to impaired status. This pattern highlights the ongoing challenges the state faces in maintaining the health of its vital water resources.

Why it matters

Iowa's waterways are crucial for recreation, wildlife, and the state's agricultural economy. Recurring impairment issues raise concerns about the long-term sustainability of these water bodies and the ability to provide clean, safe water for residents and industries.

The details

The report examines data on water quality assessments conducted by the Iowa Department of Natural Resources, which has found that many rivers and lakes in the state show signs of improvement for a period of time before slipping back into impaired status due to factors like nutrient runoff, sedimentation, and other pollutants.

  • The Gazette investigation analyzed water quality data from the past decade.
  • Many waterways have cycled between improved and impaired status during this time period.

The players

Iowa Department of Natural Resources

The state agency responsible for monitoring and managing Iowa's water resources.

Kim Hagemann

A resident who moved to Iowa in the late 2010s and has observed the water quality fluctuations firsthand.

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What they’re saying

“It's frustrating to see the water quality improve for a while, only to decline again. We need more sustainable solutions to protect our lakes and rivers.”

— Kim Hagemann (The Gazette)

What’s next

State lawmakers and environmental groups are expected to discuss potential policy changes and increased funding to address the recurring water quality issues in Iowa.

The takeaway

The cyclical nature of water quality in Iowa's rivers and lakes underscores the need for more comprehensive and long-term strategies to safeguard these vital natural resources, which are essential for the state's economy, environment, and quality of life.