Maintain Your Septic System with Confidence

Keep Your Septic System Running Smoothly

Backed by decades of experience and straightforward service

Septic systems in rural Montana face unique challenges, from soil composition to weather extremes. Andersen Sewer Service understands those conditions and brings practical solutions to homeowners and businesses throughout south-central Montana. When your system needs attention, you'll work with technicians who've seen it all and know how to get it right.

You'll know what to expect from the first call. We assess your situation, explain what's needed, and deliver the service without unnecessary add-ons or delays. Whether it's routine pumping or a full system installation, the work is completed with care and attention to detail.

Andersen Sewer Service is here to keep your property running without interruption. Matt, Brittany, and their team treat every job as if it were their own, making sure you're never left guessing about the state of your system.

Reach out to schedule your service or discuss what your property needs.

How We Handle Your Septic Needs

From the moment you contact us, you'll have a clear picture of what's happening.

We walk you through the scope of work, outline what the process involves, and keep you informed as we move through each stage. There's no confusion about timing, no vague estimates—just a straightforward plan that respects your schedule and your property.

Our team arrives prepared with the right equipment and knowledge to handle both routine maintenance and complex repairs. You'll always know who's on-site, what they're doing, and why it matters for the long-term health of your system.

Whether you're a homeowner maintaining a rural septic system or a business managing grease traps and commercial tanks, here's what you can count on:

• Honest assessments that prioritize what your system actually needs, not upsells
• Thorough pumping and cleaning that removes buildup and prevents future problems
• Repair and replacement services tailored to Montana soil conditions and climate
• Emergency response that gets your system back online when time is critical
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Connect with us to learn more about how we can support your septic system.

Trust Veteran-Owned Septic Expertise in Montana

More than 40 years of combined experience keeps your system running without disruption.

Built on Accountability and Local Knowledge

Andersen Sewer Service is veteran-owned and family-operated by Matt and Brittany, who've built their reputation on doing the job right the first time. They understand the landscape, the systems common to this part of Montana, and what it takes to keep them functioning year after year. Their roots in the community mean they're invested in relationships that last beyond a single service call.

You're not just hiring a crew—you're working with people who take pride in their craft and stand behind their work. Every technician on the team brings experience, accountability, and a commitment to treating your property with the same care they'd give their own. That consistency makes all the difference when you're dealing with something as essential as your septic system.

Get in touch to schedule a consultation or request a service visit.

Trusted by Our Community

Matt was phenomenal! I called and asked for my rv tanks to be emptied and he didnt flinch one bit. He was very polite both on the phone and in person, and he didnt sound judgemental when I called to inquire about the service. He came out got the job done very quickly and I couldn't beat the cost. Will definitely be recommending him to friends and family and will most definitely use his services from here forward. Thank you again Matt!



Price assessment

Great price

Price

$1–100

Services

Service not listed

– Emily Sherburn

Best septic company in Yellowstone county. Fair pricing and very professional. If you're needing any of his septic service i Highly recommend. He is definitely honset about his services. Everyone should be using this company he is absolutely amazing!!! Thank you so much for all you did we are beyond greatfull for you today 11/11/2025

The Ronnings

Price assessment

Great price

Services

Drain cleaning, Service not listed

– Melissa Millard

This guy is incredible I trust me I called around when our septic system failed in the middle of the night our alarms went off and we didn’t know what to do our filter was dirty and the system seem backed up and maybe one of the floats broken this guy came right out fixed everything did not charge us for a pump , it was a defective float he fixed it for free and could not see charging us for something so minimal most companies would’ve gouged us  . me being a relationship guy this will be the only septic company I ever use moving forward in Yellowstone County plus he’s a veteran!!!! thanks for the rare 10 star service !

– David Hiller

I can't recall the last time I needed a service and had a great, stress free experience.  Today, I met a brother Veteran... His name is Matt. Matt is the owner of this business, Andersen Sewer Service. Matt and I shared some things that we have in common through military service. Matt then removed the large rock from our clean out pipe (probably placed there by a child who will remain unnamed, haha) that another company missed, the two times they were here. Matt then revealed his heart to my wife and I. He was kind, caring, gracious and determined to ensure that we were all taken care of. EVERY business owner should be as this man, toward his customers.

– Blaine Rackliff

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