For more than 20 years, United Site Services has provided portable restrooms and restroom trailers, portable sinks and hand sanitizing stations, temporary fence and roll off dumpsters in Harbor City,CA. When you need safe and clean restrooms in a temporary environment, you need United Site Services. Our industry-leading standard of cleaning and disinfecting the restrooms on your site multiple times a week creates an experience rivaling permanent facilities. Porta potties can be clean, just call United Site Services.