Although all “antimicrobial” products have risks, many conventional disinfectants, such as chlorine bleach, pose more serious risks to custodial workers and building occupants because they contain active ingredients that have been found to cause asthma, cancer, skin sensitization, or other health hazards. Yet, surface disinfectants with more benign health and environmental impacts than conventional disinfectants are readily available, cost effective, and have equivalent or greater efficacy in killing bacteria, viruses, and fungi.