Legionella Found in Water Systems at Berks County PA, Wayne County MI Facilities

Legionella bacteria have been detected in the water systems of two separate facilities in 2025, prompting remediation efforts and health concerns. At Berks County South Campus in Mohnton, Pennsylvania, low levels of Legionella were found for the second time since June, leading to scheduled water flushing, additional testing, and the provision of temporary bathroom facilities and potable water while remediation is underway. The campus houses multiple county offices, but employees are not required to vacate the building during these efforts. Meanwhile, in Dearborn, Michigan, Legionella was detected in the water system at Allegria Village, a senior living community, after two residents reportedly died and a third nonfatal case emerged. The community is undergoing chemical sanitization and continuous monitoring in coordination with health authorities and water management experts, with residents advised not to drink or shower with the water in the affected building, Bridgeside Place. Both situations highlight ongoing risks of Legionnaires' disease, a severe pneumonia caused by Legionella, especially in vulnerable populations, and the importance of vigilant water system management and prompt public health response.