Clean. Reliable. Delivered On Time.

Denniss Septic Tank Service proudly provides clean, reliable, and affordable portable restroom solutions throughout Southeast Michigan and Northwest Ohio. Our Porta-Potty division offers a full range of units for every need -whether it's a construction site, weekend event, graduation party, festival, family gathering, or long-term rental.

We supply standard portable restrooms, event-ready units, and ADA-accessible options, along with hand-wash stations and hand-sanitizer stands to help keep your guests and crews comfortable and hygienic. All rentals include professional delivery, placement, and routine servicing to ensure your units stay clean and ready for use.

From large job sites to small private events, Denniss Septic Tank Service is committed to providing dependable service, fast response times, and the highest level of care in the portable restroom industry. Contact us today to book your unit or request a custom quote for your event or project.