Marshalltown, Iowa Legionnaires’ Disease Outbreak

Quick Outbreak Details:

Outbreak Dates (First to Most Recent Cases): Late August 2025 – September 2025
Confirmed Cases: 71
Deaths: 2

Exposure Source: Cooling towers are the most likely source, though not yet confirmed by lab testing.
In the late summer of 2025, Marshalltown, Iowa, became the center of a severe Legionnaires’ disease outbreak, resulting in dozens of illnesses and two tragic deaths. The investigation has raised significant public health concerns about water safety in the community.

If you have been affected by this outbreak, contact our experienced Legionnaires’ lawyers today for a free consultation.

Marshalltown Outbreak Overview

The Iowa Department of Health and Human Services (HHS) began reporting on a cluster of legionellosis cases in late August 2025. As of September 22, the outbreak has grown to include 71 confirmed cases of Legionnaires’ disease. Tragically, two individuals, described as elderly adults with underlying health conditions, have died as a result of the illness.

Legionnaires’ disease is a serious type of pneumonia caused by inhaling microscopic water droplets contaminated with Legionella bacteria. While the bacteria occur naturally in freshwater environments, they can multiply in man-made water systems. Health officials believe that cooling towers in the north central Marshalltown area are “the most likely” source of this outbreak, although a direct link has not yet been confirmed by lab tests.

Public Health Response by the Iowa Department of Health and Human Services

The Iowa HHS is actively investigating the source of the Legionella bacteria to prevent further illnesses. In response to the outbreak, businesses in the affected area have been cooperating with health officials to disinfect their cooling towers.

Officials noted that while the recent decline in new cases is encouraging, more time is needed to know if it’s a direct result of the ongoing disinfection efforts with building owners.

Health officials are advising any individuals who live, work, or have spent time in north central Marshalltown and are experiencing symptoms such as fever, cough, or shortness of breath to see a healthcare provider immediately and inquire about testing for Legionnaires’ disease.

Legal Considerations for Affected Individuals

If you or a loved one has been diagnosed with Legionnaires’ disease after spending time in Marshalltown, Iowa, you may have legal recourse. Our specialized attorneys can assist in investigating the source of exposure, determining liability, and pursuing compensation for medical expenses, lost income, pain and suffering, and other damages.

Contact Legionnaires’ Lawyers Today

If you have experienced symptoms of Legionnaires’ disease after visiting or residing in Marshalltown, Iowa, we encourage you to seek medical attention promptly. Additionally, contacting a legal professional can help you understand your rights and options.

If you have been affected by this outbreak, contact our experienced Legionnaires’ lawyers today for a free consultation.