Top-rated septic tank pros.

Get matched with top septic tank pros in Onalaska, WI

Enter your zip and get matched with up to 5 pros

Need a pro for your septic tank service project in Onalaska, WI?

Select your specific project to find the pro for you.

Verified Reviews for Septic Tank Service pros in Onalaska, WI

*The Angi rating for Septic Tank Service companies in Onalaska, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.

*The HomeAdvisor rating for Septic Tank Service companies in Onalaska, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.

Last update on January 05, 2026

Find Septic tank pros in Onalaska

Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)

Serving Onalaska, WI 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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Recommended by65%of homeowners
Request Quote
Triple M Contractors
New to Angi

Serving Onalaska, WI and surrounding areas

In business since 2005

Free estimates

Credit card accepted

We pride ourselves on being the best Excavation company in the area.\n\nWe've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing.\n\nBeing a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

Request Quote
Septic Tanks questions, answered by experts

Permits command adherence to health and environmental standards, with submission crucial for new system installations or extensive modifications.

Options include submersible, jet, and centrifugal pumps. Choose based on water needs and well depth.

There are three layers of wastewater in a septic tank: scum (solid waste that floats to the top of the wastewater), liquid (the relatively clean liquid wastewater in between the two other layers), and sludge (solid waste that falls to the bottom of the wastewater). The buildup of sludge is one of the main reasons septic tanks need to be pumped. If the tank is more than 1/3 of the way full with a combination of sludge and scum, it’s time to call a pro for pumping.

A leaking well pipe is quite different from if the well itself is leaking. To seal a leaking well, pour a cement mixture or bentonite into the space between the well casing and the borehole wall. The heavier cement collects at the bottom to form a solid seal, pushing lighter materials like mud and fluids up toward the surface. Professional well installation companies have the equipment to do this properly. 

A properly installed and maintained septic drain field (also known as a leach field) can last up to 50 years, though the average is around 20 years. However, factors like poor soil conditions, heavy usage, or improper maintenance can significantly shorten its lifespan to 15-20 years.

To extend the life of your drain field:

  • Schedule Regular Inspections: Have the entire septic system, including the drain field, inspected every two to five years to catch problems early.

  • Protect the Area: Avoid driving heavy vehicles or placing heavy structures over the drain field. Plant only grass or other lightweight vegetation with shallow roots over the area.

  • Maintain the Septic Tank: Proper care of the septic tank, including regular pumping and avoiding harmful chemicals, prevents strain on the drain field.

Be aware of signs of failure, such as strange odors, standing water, or unusually lush grass over the field, which indicate your system may need professional attention.

The Onalaska, WI homeowners’ guide to septic tank services

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

See all articles