Since 1964, Mr. John has been one of the leading portable restroom operators in western Pennsylvania, eastern Ohio and West Virginia. The company offers a wide range of products, including portable toilets, office trailers and storage containers. It serves a variety of industries, such as construction, seasonal special events, weddings and many more. Mr. Johns restroom fleet exceeds 4,000 poly-plastic units, including standard, flushing and wheelchair-accessible models. The companys employees are Portable Sanitation Association International (PSAI) certified.