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Restroom Calculator

Need an estimate for how many porta potties your event needs? Use this handy calculator! For a more specific quote tailored to your needs, call us today at 800-210-8407!

special events calculator

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St. Louis's Temporary Sanitation Experts

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On Site Companies has been St. Louis’s local temporary sanitation experts for more than 15 years! Fifteen years means not only do we know St. Louis, but we have the units and staff to get you your sanitation and service when you need it, not when we get to it. 

Big Company Capabilities,
Small Company Feel

On Site Companies has all the capabilities of a big company, but because of our dedication to our customers, we still have that small company feel we started with all those years ago. Even if we’ve grown, we haven’t forgotten our roots: dedication to providing our customers with professional and reliable service.

Standard construction unit.
Fresh Flush System

The infrastructure to get the job done.

 The secret to our
strength? It’s our infrastructure. Over the years, On Site Companies has made
investments in people, equipment, and technology to make sure we deliver
whatever sanitation solution you need. We don’t just have a large variety of
units and a healthy inventory of them, but also efficient routing and software
systems that ensure your units are ready when you need them.

A standard of professionalism.

All of this is to say that On Site will always deliver with professionalism from start to finish. We pride ourselves on raising the professional standard of the sanitation industry. Work with us and you’ll experience that standard first-hand.

Prestige Trailer