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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%
20 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%
1 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

Certain foods are easier on your septic tank than others. Septic-safe foods include yogurt, fruit, cooked veggies, and bread because these items all break down relatively easily and can pass through your system safely. Rotten tomatoes, specifically, are actually good for your septic tank because they can increase the amount of good bacteria in the system. 

Normally, when your well pump turns on or off, you’ll hear a small click. This isn’t anything to worry about, but it can be a problem if it’s clicking continuously. This can indicate that the well pump is short cycling—the pump continuously turns on and off.

This can wear out the motor and provide uneven water flow. If this happens, you may need to get it looked at by a well pump professional to see if you need to repair the switch or pump.

Septic tanks and cesspits are both types of sewage and wastewater systems, but they differ in key ways. The main difference between the two systems is that septic tanks separate sewage from wastewater and allow the latter to flow into a drainage field to filter and disperse into the soil. Cesspits don’t have outlets and instead, store sewage until it needs to be pumped by a professional.

Drain fields often include three to five trenches that are 18 to 24 inches deep. The pipes connecting the drain field to the septic tank will be placed between 12 and 18 inches deep, and the field as a whole will be about 100 feet long.

Several signs can indicate a faulty well pump pressure switch. These include your pump running continuously, the pump not turning on at all, or a sudden and complete loss of water. Other symptoms are weak water pressure or an erratic, unpredictable water flow from your fixtures. If you notice these issues, the pressure switch may be the cause. Testing the switch can help diagnose the problem. A faulty switch will likely need to be repaired or replaced. If the issue is more complex, it's best to consult a professional well technician to ensure your water supply is restored correctly.

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.