Figure. Simplified flowchart and location of Hot Springs National Park water distribution system relative to bathhouses, hot spring water jug-filling stations (depicted by asterisks), and the city of Hot Springs, Arkansas, USA, in study of Legionnaires’ disease association with hot springs, 2018–2019. Accommodation Z is not plumbed to hot spring water and is not shown. Warm water reservoir capacity was halved, from 400,000 gallons to 200,000 gallons, in response to detection of Legionella spp. in piped hot spring water.