4.9 
13 *The Angi rating for Septic Tank Service companies in Angwin, CA 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 Angwin, CA 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 September 16, 2025
Serving Angwin, CA and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"Edgar was fantastic and great to work with! I highly recommend G-Septic for your septic needs."
Serving Angwin, CA and surrounding areas
Approved
In business since 2013
Free estimates
Credit card accepted
"When our septic pump stopped working I called Superior Septic. Angel came out and figured out the complicated problem that could have eluded someone with less experience, and skill. I am impressed with how fast he fixed our pump. I highly recommend him and his company."
Serving Angwin, CA and surrounding areas
Approved
In business since 2025
Free estimates
Credit card accepted
We invite you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. We are ethical, honest, and easy to communicate with. \n\nCall us today you'll be pleased you did. Thank you
Serving Angwin, 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."
Serving Angwin, 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"
+7
Serving Angwin, CA and surrounding areas
Approved
In business since 2024
Free estimates
Small jobs welcome
"Prompt and courteous service! Effiicent with time. Kept me in the loop as to the problem and solution."
Serving Angwin, CA and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
Here at Raya Engineering, we sustain our company on the principal that our customers come first. We offer services that are tailored to your needs and we're ready to show you what our experience can bring to your project! Call us today!
Serving Angwin, CA and surrounding areas
Approved
In business since 2019
Free estimates
Credit card accepted
RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!
Serving Angwin, CA and surrounding areas
In business since 2018
Free estimates
Credit card accepted
"Very positive experience. Clint is very easy to speak with and made a point of keeping us informed during the project. We had to replace our septic tank and they also built a new leach line. All the men who worked on the project were very respectful. Our original quote was honored and the work well done. We feel great about our choice. I would recommend Clint Pridmore Construction with full confidence that everyone would be as happy as we were with our project."
Serving Angwin, CA and surrounding areas
In business since 1992
Free estimates
Credit card accepted
"They were efficient, had good customer service and quality work."
+2
From average costs to expert advice, get all the answers you need to get your job done.
It’s crucial to install a septic tank with the right volume to avoid wastewater backups. This guide will help you calculate the right septic tank volume.
Septic tank sizes vary depending on the size of your home, how many people live there, how much water you use, and more. Read on to learn how to determine the right size for you.
If you’ve never lived in a house with a septic system before, you might be wondering: Are septic tanks bad? Here are some of the pros and cons.
Want to learn how to build a septic tank for your rural or off-grid property? First, check your local laws, then dive into these general guidelines.
How deep is a septic tank, and why is it buried? Learn where to place your own septic system as well as how to maintain it and how much it costs.
Sludge buildup in a septic tank is natural, but it needs to go somewhere eventually. Learn what to put in a septic tank to break down solids efficiently.
