According to AAA State of Play - Guide to Playground Hygiene, almost half of all playground equipment is contaminated with potentially illness-inducing bacteria. While swinging on monkey bars or coasting down slides, children are exposed to the saliva, sweat, blood, urine and mucus of others. These facts make playground equipment two-times the biohazard as public restrooms.
Without consistent, proper cleaning and sanitation, playground equipment can be a breeding ground for a host of bacteria and germs that cause mild to serious health issues. Norovirus, E. coli, salmonella, and hepatitis A are just a few of the common bacterium and illnesses that can be found in children's playgrounds. In addition, already sick children can present even more of a health threat to others.