The present application concerns an apparatus and the corresponding use of a drain decontamination apparatus for decontamination and disinfecting floor drains contaminated with pathogens. The drain decontamination apparatus comprises an open enclosure capable of forming a seal against an area of floor, a dielectric barrier discharge device (2) capable of forming ozone, and sealing means (6) attached to ends of the open enclosure where the sealing means is capable of forming a seal against an area of the floor.
