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  • Average homeowner rating star icon5
    Average homeowner rating
  • Verified reviews icon13
    Verified septic tank services reviews

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

Avatar for G Septic Service
G Septic Service
4.9(
15
)
Septic Tank - Clean or Pump OutSeptic Tank - Clean or Pump Out - For Business

Serving Sonoma, CA and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"This was the 1st time using this G-septic as the other company we have used in the past appears to not be in business anymore. Was thoroughly impressed by the services we received, we had them pump our tank and after they finished they noticed my main pipe entering the tank was cracked. They were able to not only let us know of the need for a repair but gave us a price to fix it. He dug out the trench and quickly fixed it at a very very reasonable price. Super pleased, had a great conversation with Edgar the owner while he was onsite turns out this man who looks to be in his late 20's has been doing this work for 20 years and boy you can tell, he is so knowledgeable, sure glad we stumbled upon him when we Google searched septic pumpers."
Response time7 hrs
9 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for M P Excavating & Engineering
M P Excavating & Engineering
4.5(
15
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For Business

Serving Sonoma, CA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Ultimately happy with the end result and fair price for our 30ft sewer lateral replacement. Miguel was professional, friendly, and hardworking. However, communication was a bit spotty and we had follow up many times (I understand this is the busy season, though). Also, it was unclear if we were supposed to call 811; we assumed he would, but didn't, and this was an issue as the water line was hit during construction and the city had to come to shut it off on the whole street. It was handled quickly, but would have been avoidable. The project ended up taking much more time than expected, but it was completed in a day, as promised. I would recommend him, but you should be diligent and responsible yourself to make sure all the right steps are being taken."
Large drainage project
Large drainage project
Large drainage project
Large drainage project
Large drainage project

+11

Response time1 day
Response rate98%
22 neighbors recently requested a quote
JOHN MOUNTAIN
5.0(
7
)
Septic System - Install or ReplaceSeptic System - Install or Replace - For BusinessSeptic System - Repair+1 more

Serving Sonoma, CA and surrounding areas

Approved

In business since 2021

Free estimates

Offers commercial services

"I cannot say enough about how good this experience with John Mountain/Mountain Engineering has been. They said it would be 3 weeks; anti was. The work was painstakingly done, including a French drain behind the wall. And they replaced the plants that were destroyed during the process, which was an unexpected bonus."
Response time10 hrs
10 neighbors recently requested a quote
Recommended by57%of homeowners
Avatar for PEREZPLUMBING
PEREZPLUMBING
5.0(
15
)
Septic Tank - Clean or Pump OutSeptic Tank - Clean or Pump Out - For Business

Serving Sonoma, CA and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties offered

"Jesus was very professional in explaining and showing me what was going on with my drains. Out of the bids I got to replace my house drain we was the most responsible and very knowledgeable. 20k for three bathrooms under crawl space"
Septic tank pump out
Septic tank pump out
Kitchen sink install
Kitchen sink install
Kitchen sink install

+7

1 neighbors recently requested a quote
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Septic Tanks FAQs, answered by experts

The best times of year to pump or empty a septic tank are spring and fall. Many professionals recommend spring because the ground has thawed, making the tank easier to access, and any snowmelt or rainfall can aid in proper drainage. Pumping before summer is also ideal to avoid conflicts with vacations or outdoor gatherings.

Fall is another great option, as contractors may be less busy than in the spring. Servicing the tank in late fall or early spring can also reduce the risk of overflow from extra precipitation during winter and spring.

While summer is a possibility, winter is generally not recommended. The ground is often frozen, which can make it difficult to access the tank, and the waste inside may also be frozen.

The disadvantages of having a well include more maintenance, like annual testing and inspections, and high up-front costs to drill a well. Well water is also vulnerable to contamination, which is why keeping up with testing is important if you own a well. When it comes to well water versus city water, well water does offer more independence and is a reliable water source.

Yes, it is possible to pump a septic tank too frequently. The ideal pumping schedule varies based on the tank's capacity, household size, and water usage. Pumping the septic tank more often than recommended can cause the beneficial bacteria to leach into the drain field, leading to an imbalance and a build-up of solid waste.

A cistern works by collecting rainwater from your gutters and downspouts and storing it in a holding tank. The holding tank can be installed above or below ground, and the size will depend on your household needs. The stored water can then be used for household tasks, watering your garden, and even for drinking water.

Pump the tank every 3-5 years, avoid flushing non-degradable items, and address leaks promptly to extend system life.

The Sonoma, CA homeowners’ guide to septic tank services

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