In the 1940s, the shipyards of Long Beach realized that workers were losing valuable work time because they need to walk all the way back to the docks just to use the bathrooms. For this reason, they decided to build temporary bathrooms on the ships, making their work go faster and workers a little happier. They constructed a wooden cabana and then placed a small holding tank, and the first portable toilet was born.
Portable Toilets – How it began
