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Verified Reviews for Septic Tank Service pros in Bismarck, ND

*The Angi rating for Septic Tank Service companies in Bismarck, ND is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.

*The HomeAdvisor rating for Septic Tank Service companies in Bismarck, ND is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.

Last update on August 14, 2025

Top-Rated Septic tank pros in Bismarck - Updated Nov 2026

DB Plumbing and Service LLC
4.8(
2
)
Septic System - Install or ReplaceSeptic System - RepairSeptic System - Repair - For Business

Serving Bismarck, ND and surrounding areas

In business since 2021

Free estimates

Warranties offered

We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at DB Plumbing and Service strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.

Response time2 days
Recommended by100%of homeowners
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Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Bismarck, ND and surrounding areas

In business since 1971

Credit card accepted

"The technician emptied the freezer, which was in the basement, to work on the part that needed repair. Then he neglected to put anything back into the freezer, including a turkey I had bought for Christmas and a rack of ribs. Two days after he left, I went out of town for two weeks. The turkey actually exploded and spewed its liquid all over everything, which had to be discarded. I let AHS know and they couldn't even bother to call me or follow up on this. I'm considering not renewing my contract with them because of the quality (or lack thereof) of many of the providers they send."
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+2

Recommended by65%of homeowners
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Colby Enterprises
4.0(
1
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+1 more

Serving Bismarck, ND and surrounding areas

In business since 1977

Free estimates

Colby Enterprises, is a locally family owned and operated company with over 35 years of experience. We specialize in professional home improvement services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

Recommended by100%of homeowners
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Helm Excavating, Inc.
New to Angi
Septic System - Install or Replace

Serving Bismarck, ND and surrounding areas

In business since 2020

Free estimates

Offers commercial services

With over 40 years of experience in the Excavation industry, Helm Excavating INC is your industry expert in Bismarck and the surrounding areas. We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a family owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!

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W. Simpson Plumbing Services, LLC
New to Angi
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+1 more

Serving Bismarck, ND and surrounding areas

In business since 2012

Free estimates

Credit card accepted

Here at W. Simpson Plumbing Services, LLC, we are a full service plumbing company for both residential and commercial. We are local, family owned and operated, and have a strong focus on customer service. We are fully licensed and ready to take on as much work as possible. Call us today for your free estimate. We look forward to meeting your home's needs.

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Avatar for Bismarck-Septic-Excavating
Bismarck-Septic-Excavating
New to Angi
Septic System - Install or ReplaceSeptic System - Repair

Serving Bismarck, ND and surrounding areas

In business since 2010

Free estimates

Offers commercial services

Bismarck-Septic-Excavating is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests and make their concerns the basis of our business.

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Septic Tanks FAQs, answered by experts

Most deep wells can be expected to last somewhere between 30 and 50 years. This assumes that the well and all of its components are properly maintained on a regular basis. During this time, it is unlikely that modern deep wells will run dry over the course of their typical lifespan. That is one of the biggest benefits of digging a deeper well. 

The depth of your septic tank has nothing to do with its size. In fact, some septic tanks can even be installed above-ground! Like other sizes, a 1,000-gallon septic tank could be buried as shallow as 4 inches below the ground or as deep as 4 feet. It all depends on your specific property.

Depending on local conditions, a deep well may be a better choice than a shallow well. Deeper well depth accesses groundwater that has been naturally filtered through many layers of soil and rock. This reduces surface contaminants and may offer cleaner water, but deep wells cost more money to build and maintain. The water may be harder and have higher radioactivity, too. 

Installation necessitates professional expertise due to complexity and to ensure safety when handling waste.

Yes, shower water goes into the septic tank. Shower water is a type of greywater, and in fact, all water used in a home with a septic system—including water from sinks, toilets, the dishwasher, and the washing machine—drains into the tank. When shower water enters the tank, debris like soap and hair travels with it. The solid debris sinks to the bottom to become sludge, while soap residue joins the scum layer at the top. The remaining water is treated in the tank before moving to the drain field for further treatment and dispersal. It is important to avoid putting oil or harsh chemicals down any drain, as they can cause clogs or disrupt the beneficial bacteria required for proper wastewater management in the septic system.

The Bismarck, ND homeowners’ guide to septic tank services

From average costs to expert advice, get all the answers you need to get your job done.

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