19-06: Impact of Legionella Regulations on Water Treatment Programs and ControlImplementations of local Legionella regulations bring attention to cooling towers and their perceived Legionella risk. Following the enactment of a local regulation in the Province of Quebec in Canada, an observational prospective survey was undertaken by a leading water treatment firm. A review of a large dataset of Legionella culture results from more than 300 cooling towers with their associated water treatment program control over three years