A method for visualizing historical pathogen sampling in a facility includes the following steps: (1) populating a plurality of sampling locations as a plurality of icons on a map of the facility; (2) receiving sampling data specifying a plurality of pathogen levels at the plurality of sampling locations; (3) assigning one of a plurality of colors to each of the plurality of sampling locations according to the plurality of pathogen levels; (4) coloring the pathogen sampling locations on the map with the assigned colors to form a frame; (5) repeating steps (2), (3), and (4) on at least three different occasions to form a sequence of frames; and (6) sequentially displaying the sequence of frames and an identification of the respective occasion at a constant rate.