An anesthesia station for one or more laboratory animal(s), comprising: - an anesthesia block connected to at least one peripheral device (3, 4) receiving the laboratory animal, with said anesthesia block being able to supply said peripheral device (3, 4) with halogenated anesthetic gases, - means for aspirating the halogenated gases from the peripheral device, - at least one filter (302, 402) having a determined organohalogen concentration retention capacity, with said filter (302, 402) being so arranged as to be crossed by the halogenated anesthetic gases from the peripheral device (3, 4) during the operation of the aspiration means, and - a system for the automatic determination, in real-time, of the organohalogen saturation rate of the filter (302, 402), with said system comprising: o means for measuring the instantaneous flow rates of the halogenated anesthetic gases going through the filter (302, 402) at given time intervals, o means for determining the retained halogenated gases concentration in the filter (302, 402) according to the instantaneous flow rates of the halogenated anesthetic gases measured at each given time interval, o means for calculating the saturation rate of the filter (302, 402) from the halogenated anesthetic gases concentrations determined at each time interval and the determined storage capacity of the filter (302, 402). - an anesthesia block connected to at least one peripheral device (3, 4) receiving the laboratory animal, with said anesthesia block being able to supply said peripheral device (3, 4) with halogenated anesthetic gases, - means for aspirating the halogenated gases from the peripheral device, - at least one filter (302, 402) having a determined organohalogen concentration retention capacity, with said filter (302, 402) being so arranged as to be crossed by the halogenated anesthetic gases from the peripheral device (3, 4) during the operation of the aspiration means, and - a system for the automatic determination, in real-time, of the organohalogen saturation rate of the filter (302, 402), with said system comprising: o means for measuring the instantaneous flow rates of the halogenated anesthetic gases going through the filter (302, 402) at given time intervals, o means for determining the retained halogenated gases concentration in the filter (302, 402) according to the instantaneous flow rates of the halogenated anesthetic gases measured at each given time interval, o means for calculating the saturation rate of the filter (302, 402) from the halogenated anesthetic gases concentrations determined at each time interval and the determined storage capacity of the filter (302, 402). o means for measuring the instantaneous flow rates of the halogenated anesthetic gases going through the filter (302, 402) at given time intervals, o means for determining the retained halogenated gases concentration in the filter (302, 402) according to the instantaneous flow rates of the halogenated anesthetic gases measured at each given time interval, o means for calculating the saturation rate of the filter (302, 402) from the halogenated anesthetic gases concentrations determined at each time interval and the determined storage capacity of the filter (302, 402).