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HSB 657

A bill for an act requiring the department of natural resources to identify specific animal sources of pollutants to a water of the state when determining the water’s inclusion on a list of impaired waters.

2025-2026 Regular Session

Iowa bill requires DNR to identify specific animal pollution sources when listing impaired waters, potentially shielding agriculture from regulations while complicating environmental enforcement.

Subcommittee Meeting: 02/10/2026 12:00PM RM 304.
#livestock #naturalresources #pollution #water #waterquality
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Bill Summary · HSB 657

Legislative bill overview

HSB 657 requires Iowa's Department of Natural Resources to identify and specify which animal sources are causing water pollution when classifying waterways as impaired. Currently, the DNR can list waters as impaired without explicitly identifying whether pollution stems from livestock operations, wildlife, or other animal sources. This bill mandates greater specificity in pollution source documentation.

Why is this important

Water quality designations trigger regulatory requirements and can affect agricultural operations, property values, and environmental remediation funding. By requiring source identification, the bill could shield agricultural producers from pollution designations caused by wildlife or other non-agricultural sources, but could also increase scrutiny of livestock operations if they're identified as polluters. The change affects how responsibility and cleanup obligations are assigned.

Potential points of contention

  • Agricultural industry perspective: Livestock producers may benefit from clearer source attribution if wildlife or other sources are responsible; however, operations identified as polluters face potential regulatory burden
  • Environmental enforcement: DNR and environmental advocates may argue that requiring specific animal source identification complicates and delays water quality assessments, potentially weakening protections
  • Implementation burden: The DNR must conduct more detailed scientific analysis to attribute pollution to specific animal sources, requiring additional resources and expertise that may not currently exist

Compiled from official sources — confirm details with the bill’s official record.

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