Denniss Septic Tank Service, LLC

Denniss Septic Tank Service, LLC Owned and operated by Nate Dusseau and Mike Denniss for over 50 years. Call us today at 734-777-3049 for all your septic needs! Mike Denniss is on every job!
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We specialize in septic tank pumping, septic inspections, repairs and portable restroom rentals. When your septic system needs cleaning, our specialists offer fast and reliable services for residential and commercial customers! Whether your existing tank has stopped working or you're building a new system, ensure your holding tank gets cleaned regularly. Don't spend your entire paycheck on less th

an the best septic cleanings. Denniss Septic Tank Service has many budget-friendly options! Your septic system is an integral part of your home or business. Get high-quality services and care from our expert septic specialists! When you're looking for quality septic services, Denniss Septic Tank Service is the perfect choice. For over 30 years we've been accommodating residential and commercial customers throughout the Monroe County area! Did you know that your septic tank needs to be cleaned every 3 - 5 years? Denniss Septic Tank Services can guide you through the entire cleaning and pumping process. We offer honest and dependable care for all your systems. From flushing out old tanks to the very first cleaning, we are here each step of the way! Whether you have an emergency or a temporary holding tank, state law requires it to be cleaned regularly and more often than a permanent sewer system. Let our licensed and insured professionals ensure you get the pump and haul-away service you need for your tanks. We adhere to all state guidelines to avoid any unnecessary issues.

Today was all about septic inspections for the Denniss Septic Tank Service LLC team.Our wastewater technicians were out ...
06/02/2026

Today was all about septic inspections for the Denniss Septic Tank Service LLC team.

Our wastewater technicians were out across Monroe County performing multiple septic inspections for homebuyers, homeowners, realtors, and home inspectors. We completed three inspections today in different areas of the county, providing thorough evaluations, photo documentation, detailed summary reports, and same-day reporting.

A septic inspection is one of the most important inspections you can have completed before purchasing a home. Our goal is to provide the information you need to make an educated decision and move forward with confidence.

If you’re buying or selling a home, give us a call to schedule your septic inspection.

📞 Denniss Septic Tank Service LLC
734-777-3049

Serving Monroe County and surrounding areas for over 45 years.

☀️ What a great start to summer!This weekend we had portable toilets out for graduation parties, baby showers, diaper pa...
06/02/2026

☀️ What a great start to summer!

This weekend we had portable toilets out for graduation parties, baby showers, diaper parties, community events, downtown events, and family get-togethers all across the area.

At Denniss Septic Tank Service LLC, we take pride in providing clean, affordable portable restrooms and dependable service from start to finish. Just as important as getting them delivered on time is getting them picked up promptly when your event is over. Our team spent today collecting units from weekend rentals so our customers aren’t left looking at a porta-potty all week long.

Thank you to everyone who trusted us with your event this weekend. We appreciate your business and look forward to serving you all summer long!

📞 734-777-3049
Ask for Nate or Mike
Locally owned and operated for over 45 years

05/29/2026

Happy Friday from Denniss Septic Tank Service LLC!

Busy day of septic pumping and dropping off porta-potties for weekend events all across the area. If you need a porta-potty rental, septic pumping, or last-minute weekend service, give us a call anytime!

📞 734-777-3049
Denniss Septic Tank Service LLC

05/28/2026
05/27/2026

Pumping campers this morning!

Did you know Denniss Septic Tank Service specializes in RV, camper, boat, and trailer pump-outs? We have several customers on our regular route every week — whether they’re staying at a campground, living in a camper while building their forever home, or needing service at a job site.

Our team uses specialized equipment designed specifically for these types of pump-outs to help ensure the job is done safely, efficiently, and without causing damage to your system or camper.

If you need a camper, RV, boat, or trailer pump-out this summer, give us a call anytime! ☀️🚐

📞 734-777-3049
Denniss Septic Tank Service LLC

Proudly serving Monroe County and surrounding areas.

🇺🇸 Happy Memorial Day from all of us at Denniss Septic Tank Service, LLC. 🇺🇸As we enjoy the long holiday weekend with fa...
05/25/2026

🇺🇸 Happy Memorial Day from all of us at Denniss Septic Tank Service, LLC. 🇺🇸

As we enjoy the long holiday weekend with family, friends, cookouts, and time off, let’s not forget what Memorial Day is truly about. Today, we remember and honor the brave men and women who made the ultimate sacrifice for our country and for the freedoms we enjoy every day.

We are incredibly thankful for those who served and gave everything for this nation. Their courage, sacrifice, and dedication will never be forgotten.

From our family here at Denniss Septic Tank Service to yours, we hope everyone has a safe and meaningful Memorial Day weekend. God bless our veterans, our active service members, and the families who have sacrificed so much for this country. 🇺🇸

— Denniss Septic Tank Service, LLC
Proudly serving Monroe County and surrounding areas
📞 734-777-3049

05/23/2026

Saturday morning emergency call!

Customer called us this morning with sewage backing up and not flowing correctly. We pumped this septic tank about a year ago, so we knew right away the issue was likely not the tank being full, but something blocking the line instead.

Our crew brought out both our drain cleaning equipment and septic truck, vacuumed the line out, cleared the blockage, and got everything flowing again. ✅

Nothing worse than septic problems heading into a holiday weekend, especially on a Saturday morning. We were happy to get them taken care of quickly so they can enjoy the rest of Memorial Day weekend without worrying about it.

If you run into any septic, sewer, or drain issues, give Denniss Septic Tank Service a call. We’re available for emergency service when you need us.

📞 734-777-3049
Denniss Septic Tank Service LLC
Proudly serving Monroe County for over 45 years.

Getting some last-second jobs wrapped up before the holiday weekend 🇺🇸Today was full of septic tank pumping, septic insp...
05/22/2026

Getting some last-second jobs wrapped up before the holiday weekend 🇺🇸

Today was full of septic tank pumping, septic inspections, and porta-potty service calls as we helped get our customers ready for Memorial Day weekend.

One moment today really stood out to us. One of our guys asked if he could stop home for a few minutes to see his little one and let him sit in the truck. Of course we said yes. Moments like that are what being a family-owned business is all about.

We believe happy employees make great employees. Our crew takes a lot of pride in their work every single day, whether they’re pumping tanks, servicing porta-potties, helping on inspections, or jumping in wherever needed. We’re very thankful for the hardworking guys we have on our team.

We hope everyone has a safe and relaxing Memorial Day weekend. Spend some time with family and friends, enjoy the weekend, and remember those who made it possible 🇺🇸

As always, we will still be available for emergency service calls throughout the weekend if needed.

📞 Denniss Septic Tank Service LLC
(734) 777-3049

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Services Available In:
Petersburg, MI
49270

Telephone

+17342692637

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