Oakland County began addressing Legionella concerns in early November 2025 after an employee at the Sheriff’s Administration Building was diagnosed with Legionnaires’ disease. Testing detected low levels of the bacteria in parts of the county complex, prompting system flushing, temperature monitoring, installation of 0.2-micron filters, and expanded sampling. Recent follow-up tests show mostly non-detect results and improved readings, and officials describe the situation as ongoing prevention rather than a widespread outbreak. WWJ's Tim Pamplin reports.