The largest shower measured 30.48 m (100 ft) long, 12.19 m (40 ft) wide, and 3.04 m (10 ft) tall and was manufactured by PertPlus in conjunction with the Chicago firefighters (all USA) at Six Flags Great America and Hurricane Harbour in Gurnee, USA, on 9 July 2009.
They also attempted the most people showering simultaneously at the same event.
Please note: Comments below may relate to previous holders of this record.