TP22-20: A Status Update on Legionella RegulationsPreviously existing Legionella regulations, standards and guidelines have evolved during the last few years and new ones continue to be introduced. The majority of the new texts are still strictly voluntary, and at the time of this writing very few jurisdictions have codified them into law. In some cases, particularly in the health care arena, the authorities having jurisdiction are enforcing specific provisions of these documents with significant