M&M Portable Toilets & Septic LLC.

The most important decision to make before renting is to determine how many portable toilets you will need for your crowd.
Most rental companies provide a basic chart for large crowd use; as mentioned below, construction site use dictates roughly one porta potty per 10 workers per workweek.

Note: When figuring out how many you need to rent,  If alcohol is being
served, add 15-20%
more restrooms.
Include 1 handicap
restroom per 15 regular
restrooms, or at least
one handicap for public

Hand washing stations
should also be provided
with restrooms in all food
service areas.