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Best septic tank pros near Seneca, IL

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

Avatar for McDonagh & Sons Plumbing & Sewer Inc
McDonagh & Sons Plumbing & Sewer Inc
4.1(
69
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Seneca, IL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

Mcdonagh & sons plumbing & sewer takes great pride with 15 years of experience! We are honest, reliable, genuine and trustworthy! We are constantly referred by our customers because of our great service and dedication to meet their needs! We offer free estimates! "anything plumbing, anything sewer, any time". Ertain areas are to subject a service fee *prices may vary. Discounts can not be combined, unless noted. Award winning. Additional dba - mcdonagh & sons plumbing and sewer.

Recommended by96%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 Seneca, IL and surrounding areas

In business since 1971

Credit card accepted

"I just pay $75 you never know who's going to come out. They do everything electrical. Just about everything is covered except the septic tank. I had an air conditioner replaced. It went great, all I had to do was pay for the freon. He didn't charge e more than what was needed."
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+2

Recommended by65%of homeowners
Talmadge Septic
0.0(
1
)
Septic Tank - Clean or Pump Out

Serving Seneca, IL and surrounding areas

In business since 2006

Free estimates

Talmadge Septic has been serving Ransom and the surrounding area for over 5 years. Owner Francis Talmadge has over 50 years of experience in the septic cleaning business and is here to take care of your septic cleaning or pumping needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job with satisfaction guaranteed. Call today to get your septic job done.

Recommended by100%of homeowners
Avatar for M&D Demolition & Excavating
M&D Demolition & Excavating
5.0(
1
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+3 more

Serving Seneca, IL and surrounding areas

We have have been in business since 2004. We are a family owned company and all of our workers are family. We can do landscaping, small demolition work, trenching, small excavating projects, small land cleaning, brush cutting, gravel driveway repairs, hailing things, and more! We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today!\n

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+3

Recommended by100%of homeowners
Ryan Excavating
New to Angi
Septic System - Install or Replace

Serving Seneca, IL and surrounding areas

In business since 2012

Free estimates

Emergency services offered

At Ryan Excavating, we take great pride in our experience, expertise, quality and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

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Response time4 days
Plumbing Help & Co.
New to Angi
Septic System - Install or ReplaceSeptic System - Repair

Serving Seneca, IL and surrounding areas

Hi, I’m a skilled and reliable plumbing professional serving the Chicagoland area. I specialize in residential and light commercial work, including repairs, installations, and troubleshooting everyday plumbing issues.\n\nI take pride in doing the job right the first time, showing up on time, and communicating clearly so there are no surprises. Whether it’s a small fix or a bigger project, my goal is to provide quality work, fair pricing, and service you can trust.\n\nI look forward to helping you keep your plumbing running smoothly.

Septic Tanks FAQs, answered by experts

Common problems include low water pressure, no water, and strange noises. Regular maintenance prevents many issues.

Consider site conditions, soil type, required capacity, and system designs compatible with environmental protection regulations.

Conventional anaerobic septic systems are the most cost-effective and least expensive type, with installation costs typically ranging from $3,000 to $8,000. For comparison, sand filter systems cost between $7,000 and $18,000, while mound systems are the most expensive at $10,000 to $20,000. Several factors influence the final price. The tank material is a key consideration; plastic tanks are the most budget-friendly option, starting around $2,900, but concrete and fiberglass tanks offer greater durability and longer life spans at a higher cost. The size of the tank also affects the price. For example, a 1,000-gallon tank costs between $900 and $1,500, whereas a larger 1,500-gallon tank costs $1,500 to $2,500.

According to the Environmental Protection Agency (EPA), septic tanks must be located a decent distance from places subject to flooding or surface ponding. Additionally, septic tanks should be installed on level ground so that the waste can properly settle in the tank. Most tanks are located 10 to 20 feet away from the home. More specific requirements vary by location, so call a local septic pro or your local health department for more information.

If your well pump is running continuously (meaning without turning off or stopping), it's a sign that your well pump is starting to break down. The length of time your well pump should cycle is dependent on many factors, like the tank size, pressure setting, and even the amount of water in your well. Generally, your well pump should cycle, or go from running to not running every few minutes.

The Seneca, IL homeowners’ guide to septic tank services

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