The Chester County Health Department will distribute free potassium iodide (KI) tablets during its annual emergency preparedness event on Thursday, Aug. 13. Officials say the tablets should only be taken if directed by the governor, the Pennsylvania Department of Health or the Chester County Health Department. Anyone who received KI tablets before May 2024 should replace them because they have expired. People who cannot attend can request KI tablets online through the Chester County Health Department. Potassium Iodide Dispensing Event and Resource FairThursday, Aug. 13 | Noon - 6 p.m.Phoenixville Middle School1000 Purple Pride Pkwy.