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

WASHINGTON SEPTIC SERVICES LLC
5.0(
3
)
Septic Tank - Clean or Pump OutSeptic System - Install or ReplaceSeptic System - Repair+3 more

Serving Onalaska, WA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"individuals completing my septic issues were knowledgeable and efficient. They explained what this issue was and how to avoid problems in the future. Also, the charge was reasonable for the work involved. I would highly recommend and hire them in the future."
My jobs
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+1

Response time1 day
Response rate96%
19 neighbors recently requested a quote
Avatar for Sasquatch Septic
Sasquatch Septic
5.0(
4
)
Septic Tank - Clean or Pump Out

Serving Onalaska, WA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

Sasquatch Septic 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.

Response time2 hrs
Avatar for Dependable Excavation Plus
Dependable Excavation Plus
5.0(
8
)
Septic System - Install or Replace

Serving Onalaska, WA and surrounding areas

Approved

In business since 2020

Free estimates

Customers say: Quick response

"Defendable Excavation Plus provided ground leveling, rock and brush removal services for me. A bid was promptly given me, and the service provided was excellently completed in one day. I recommend this company to anyone needing this type of service."
Response time1 day
Response rate100%
3 neighbors recently requested a quote
Avatar for Alltime Construction LLC
Alltime Construction LLC
5.0(
1
)
Septic System - Install or Replace

Serving Onalaska, WA and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

Our company provides exceptional service to the surrounding areas. Always taking pride in all of our services, striving to execute with excellence, and putting our customers in the forefront, is our philosophy. Whatever your Masonry needs may be, you can count on our company to leave you satisfied and happy. \nCall today , youÂ’ll be pleased you did. Thank you \n

Response time5 days
1 neighbors recently requested a quote
Avatar for Creekside Excavation & Hauling LLC
Creekside Excavation & Hauling LLC
5.0(
7
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Onalaska, WA and surrounding areas

In business since 2021

Free estimates

Emergency services offered

Full service excavation company specializing in land clearing, foundation dig outs, power pole installation, trenching, grading, demolitions, building roads, repairing driveways & anything to do with dirt. We also deliver crushed rock, fill dirt & turf mix for our valued customers.\n\nWe live where we work so our number one goal is customer satisfaction.

Foundation dig out & Pad Compaction
Land before road & landscaping
Progress including tree clearing
Finished Product
Additional Photos

+8

Recommended by100%of homeowners
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 Onalaska, WA 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
J&B Septic - Trang ch Facebook
New to Angi
Septic Tank - Clean or Pump Out

Serving Onalaska, WA and surrounding areas

In business since 1989

Free estimates

With years experience in the septic industry, J&B Septic LLC is your industry expert in Kelso 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 locally 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! \n \n

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Septic Tanks FAQs, answered by experts

Ensuring you have adequate space for your engineered septic system is crucial. You’ll need to reserve approximately 900 square feet for a three-bedroom home’s system. However, the type of soil you have, soil absorption rate, the size of your home, climate, and local zoning code will impact the actual amount of space you need.

There are a variety of different types of septic systems that can work in your home—such as conventional anaerobic systems, chamber systems, drip distribution systems and mound septic systems. All of them work using natural processes to break down solid waste and effectively treat wastewater without needing to be connected to a city sewer system. Which type of septic system you need will depend on characteristics of your property like how high the bedrock is or groundwater table is. Different types of systems come at different costs to install.

Neither system is necessarily better or worse than the other, but one of the two might be better for your needs. For example, anaerobic systems are less expensive than aerobic ones and don’t use power to run. On the other hand, aerobic septic systems don’t take up as much space and are typically more efficient than their anaerobic counterparts.

Unfortunately, yes. If your well pump continues working when the flow of water is completely blocked, the motor will burn up. The energy has nowhere to go, thanks to the blockage, so it turns inward. The end result? A ruined well pump and a depleted bank account (once you shop for a replacement.) 

If you notice a septic smell in the house, you can either call a septic system repair company or a plumber. These professionals have the proper licenses and equipment to investigate the pipes and septic tank while keeping your family safe from sewage gas exposure and raw sewage leaks. They will be able to find the problem as soon as possible and get it fixed so that your home can get back to smelling fresh again.

The Onalaska, WA homeowners’ guide to septic tank services

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