The average porta potty is able to hold enough sewage for 7 people over the course of a 40-hour work week.
What is the blue stuff in the bottom of a porta potty?
Biocides: Biocides are the primary active ingredient in porta potties’ blue liquid. These are substances meant to prevent the growth of gram-positive bacteria that release some unpleasant odors. These bacteria are responsible for many foul odors beyond those associated with human waste.

The pathogens that live inside portable toilets have the capacity to make humans very sick. According to Charles Gerba, Ph. D, a microbiologist, and professor at the University of Arizona: “Portable restrooms are hotbeds of bacteria and viruses that occur in infected human waste.” The following are some of the worst.

The more a portable restroom is used, the more likely it’s going to smell. However, regular cleaning and service of your restrooms can help mitigate the odors and keep the foul smells away.