The quality of swimming pool water that don’t fulfill the condition will cause healthy rnimpact to the visitors. One of swimming pool water pollution can be caused by Coli rnbacteria (Coliform bacteria).rnThis research was aimed to know the quality of swimming pool water in Jombang city rnbased on bacteriological that used MPN method.rnThe design of researd that used is descriptive, with 8 sw…