Abstract: Method for managing a set of swimming pools, each swimming pool being provided with a means of monitoring the quality of the water contained in the swimming pool, each of the monitoring means communicating by means of a communication network with at least one management centre, characterized in that it comprises a first step of detection of a degraded state on at least one swimming pool of the set, called “victim swimming pool”, and a second step of determining swimming pools of the set threatened with turning into a degraded state, each called “threatened swimming pool”. Management centre for a set of swimming pools implementing such a method, device for managing a subset of a set of swimming pools, means of monitoring the quality of the water contained in a swimming pool and use of a swimming pool as sensor to determine a potential risk.