A system (1) for the execution, traceability, monitoring and control of reducing the bacterial count in a confined environment, includes an environment identification device (2) arranged to contain information relating to the confined environment. A device (3) for micronizing air-dispersed decontaminant substances is arranged to diffuse through a diffuser (9) a decontaminant substance (12) by air as dry fog, based on the information contained in the environment identification device (2). A detection sensor (4) detects the concentration of the decontaminant substance (12). An instantaneous bacterial analysis sensor (5) determines the quantitative and qualitative bacterial concentration. A central server (6) processes data received from the diffuser (9), from the detection sensor (4) and from the instantaneous bacterial analysis sensor (5), to identify anomalies with respect to a desired quantitative and qualitative bacterial objective and certify the bacterial result obtained as a result of the diffusion of the decontaminant substance (12).
