Kelso Aerobic Septic System

When it comes to the best aerobic septic system designs in Kelso made specifically to your needs, this is where you’ll find them. At McNair Septic Design & Counseling, we have been working for over five decades with homeowners and property owners in he area, ensuring that they get the septic systems that meet their needs. From the design process to getting approval to go ahead with the installation, we’re here to make the process much easier from beginning to end.


About Our Aerobic Septic Systems in Kelso

A common option for areas with challenging soil conditions, poor drainage, or with limited space for traditional drain fields, aerobic septic systems include a trash/dose combo tank, aerobic treatment tank, and a drainfield, placed downhill from the home’s plumbing. Unlike traditional gravity tanks, aerobic systems pump air into the waste to speed up the treatment process, before solid material and water, with the latter being sent into the drainfield.


Our team is ready to match your specific needs with the aerobic septic systems that best meet them. Just provide your address and plot number, and we can start information gathering and assessing the site directly, giving our assessment on the size and placement of the system to best meet your needs, such as how much waste your home is likely to produce.


It’s not just the design process that we take care of, either. Our team is also here to handle the often complex process of applying for county permits, such as when we complete a soils evaluation, and then when we submit the completed design. If approved, we can also send the design to builders so that they can start bidding on the installation.


Why People In Kelso Choose McNair For Their Septic Systems

We have installed countless septic systems for the people of Kelso and the surrounding areas, bringing expertise in all kinds, including aerobic septic systems. If you want to know why people trust us with their septic needs, here are just a few of the reasons to keep in mind:


Three Generations of Septic Design Expertise

Our family has been designing septic systems in Washington since the 1970s. That legacy means decades of hands-on knowledge are built into every design, ensuring you get a system that lasts.


4.9-Star Reputation Backed by Hundreds of Happy Customers

Homeowners choose us because we combine creative problem-solving with practical solutions. Unlike other companies, our reviews reflect a consistent track record of designs that fit budgets, meet regulations, and work flawlessly.


Designs for All Manufacturers – Not Just the Ones We Favor

Unlike several of our competitors, we are not owners or distributors of any specific septic systems. This independence ensures our designs are driven solely by what is best for your property—not by product commissions or supplier kickbacks. Our goal is to provide you with the most effective, efficient, and cost-conscious septic solution tailored to your unique needs.


Septic Systems Specifically For You

Just as no two properties in Kelos are alike, neither are two septic systems from McNair Septic. We start with a complete evaluation of your land and soil, designing a system that meets your needs as well as local requirements. Precision, care, and specificity go into every one of our designs.


Start Designing Your Septic System Today

With years of expertise and a reputation for service that puts the customer first, McNair Septic Design & Counseling is here to take on your aerobic septic system design project in Kelso. Our designs are practical, effective, and customized to your site and needs.


You can get started by completing the quote request form provided here, and we’ll get in touch soon.


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Kelso Aerobic Septic System