Iowa Factory Farm Manure Pollution Crisis Iowa’s manure-pollution crisis remains severe and active in 2025-2026, with multiple recent reports showing continued illegal discharges, high manure volumes, and persistent drinking-water contamination. Food & Water Watch says Iowa’s Department of Natural Resources documented 179 manure discharge violations from 2013-2023, and its 2025-2026 materials estimate that Iowa factory farms generate about 109 billion pounds of manure annually while more than half of the state’s rivers and streams are classified as impaired.
Recent reporting indicates weak enforcement continues to be a major issue. In 2025, the DNR reported 13 manure-discharge incidents directly into state waterways, and one analysis found 38 agricultural NPDES permit violators were identified in 2025 while only one was fined. Separate 2026 reporting also found Iowa livestock operations generated about 107.6 million tons of manure in 2025, with roughly 15,309 animal feeding operations identified and more than 4,300 more facilities than state records showed, suggesting the scale of the problem may be larger than official oversight data captures.
Water-quality and public-health impacts remain concentrated in central Iowa and other agricultural regions, especially around nitrate-contaminated waterways and drinking supplies such as the Raccoon and Des Moines rivers. Recent local reporting said those rivers exceeded the federal nitrate safety threshold for 33 days in one summer, while state and advocacy reporting continues to link manure runoff to drinking-water treatment costs, fish kills, and impaired waterways across Iowa.
