Provisional — subject to revision
Marshalltown, Iowa
Legionnaires’ disease outbreak · Aug-Sep 2025 · Iowa
- 74
- Cases
- 2
- Deaths
- Under Investigation
- Status
Suspected source
Suspected cooling towers (under investigation) (Cooling tower)
What happened
Large community outbreak in north central Marshalltown. CDC assisting Iowa HHS. Multiple cooling towers tested and remediated.
Affected ZIP codes
50158
In-depth reporting on this and other Legionnaires’ disease outbreaks is available from Pritzker Hageman’s Legionnaires’ disease resource center.
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Primary source: Suspected cooling towers (under investigation). Figures are provisional and may be revised or withdrawn by the reporting authority. This page is for information only and is not medical or legal advice.