About Us

About Us

A History of Excellence

We have provided exceptional service to New Hampshire residents and businesses for more than 40 years. It is our commitment to offer high quality service and technical expertise to exceed your expectations. Any repair or routine maintenance required of your septic disposal system will be met with our courteous, professional staff. Each of our technicians is trained by the highest standards and we are a licensed provider by the New Hampshire Department of Environmental Services.

We are committed to offering high quality services and technical expertise that exceed expectations.

Felix Septic Service, Inc. was founded over 40 years ago. Mark Thompson acquired the company in 1987 and continues to operate it as a family business with two of his sons and a nephew as an intricate part of his staff. Mark maintains the original company name of Felix Septic as a gesture of respect and gratitude to its original owners.

“The Company has grown to be one of New Hampshire’s largest and most prominent septic service providers. We are capable of solving any problem that may arise with septic disposal or drainage systems.”

– Mark Thompson, Owner

To tackle any repair or routine maintenance required of your septic disposal system with the highest quality and technical expertise by a courteous, professional staff.

Thousands of residential customers benefit regularly by our services. Additionally, Felix is proud to service multiple health care facilities and schools in Central and Southern New Hampshire.

  • Pellham School District
  • Windham School District
  • Londonderry School District
  • Bedford School District
  • Elliot Helath
  • Cigna Health
  • United Healthcare

Among our dedicated commercial clients, we capably serve multiple locations for:

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for an appointment or to learn more about our services.


Here’s what our customers had to say about our services:

I can say they are a local company and it starts from the top. Their communication flows from the top down. They know how to get the job done through the permitting process in the least amount of time and for the least amount of expense.

Emile Haddad, McDonald's business owner

Just wanted to say that Nick was a great help today. Not only did he identify the problem and drain the tank, he also showed me the flaw in my system and how to fix it. He was the one bright spot in a day filled with vacuuming up dirty water in my basement. Thanks for everything.

Leo Schofield

Being we are very small development and financially limited, we really appreciate your efforts to take care of us. Your servicemen were very considerate to spend time with us, educating us through the process.

Brian Dube, Southwoods at Chester HOA
I wanted to thank you for servicing our home and also make sure you know you have good workers!
You guys are fabulous once again! I love you guys! Great job!
Fran, Town of Alton
We had our septic pumped the first since purchasing our home. We are grateful to have Felix as a company that we can rely on with our septic needs.
Christine Janvrin
Hello Felix team, I wanted to take the time to provide a “job well done” by your service Tech. “Paul” today, he was great! Very knowledgeable, explained everything to me, fast, clean, very personable. I will always recommend Felix.
Steve T. , Residential Home owner and client