About Us

Bringing you septic services since 2012

About US

Shane and Kelsey Leingang Big Muddy Septic

We Are A Full Service Septic Business

Founded in 2012, Big Muddy Septic Service offers residential and commercial pumping services throughout North Dakota and the surrounding states. Whether it’s a commercial grease trap or shop pit, residential septic system cleaning or inspection, or a 150,000g municipal digester, Big Muddy has developed a reputation for getting the job done right the first time. 

From part time beginnings, Big Muddy has successfully grown into a full time business by offering its customers consistency in the quality of  service it provides, competitive pricing and continued reliability. 

In 2019, after 5 years as Big Muddy’s sole operator, Shane Leingang jumped at the offer to purchase the company from it’s previous owner. Shane, along with his wife Kelsey, have dedicated the majority of their lives to service and construction labor industries and were well equipped to assume new roles as owners. Although they both have their particular roles within the company, you’ll see both of them out and a bout in the trucks servicing customers. They look forwarding to continuing Big Muddy’s growth and success. Shane and Kelsey reside in Bismarck, ND with their 5 children, 3 dogs and 3 cats.

What WE Do

We Offer A Full Range Septic Services

Big Muddy Septic Service handles all your pumping needs from septic inspections, clean outs, restaurant grease traps, car wash/shop pits & industrial services.

Big Muddy’s mission is to provide the communities in which we serve with friendly and knowledgeable staff, superior pumping service and above all the understanding that it is a priviledge to serve and earn our customer’s business.

Residential Septic Tanks

Depending on the household size, most septic tanks should be serviced regularly every 2-3 years. Call today for more information

Commercial Grease Traps

Large or small, we offer a variety of service options depending on your tank size and the required service frequency

Certified Septic Inspections

All inspections are performed by Certified Inspectors with pictures and a report being sent directly to you within 48hrs.

Car Wash and Shop Pits

When servicing pits, our techs are the best in the biz. Call us today to discuss service frequency and pricing

Industrial Services-Multi-state

We service multi-states competitive rates & on time completion . Call today for an estimate on your next large scale pumping job

Home, Commercial, Industrial, You Name It, We’ll Be there.

Serving Bismarck/Mandan and surrounding areas


Main Office

Bismarck North Dakota

Call Us

(701) 751-5868