A microbial detection article and methods of using the same, the article comprising: a base member comprising a self-supporting water impervious substrate with first and second generally opposed major surfaces; a filter assembly defining a filter assembly aperture therein, and having a composite filter body mounted across the filter assembly aperture; wherein the composite filter body comprises: a microporous membrane, and a water-absorbent layer in fluid communication with the microporous membrane; and a cover sheet.