Complete Septic System Services

Leave the septic work to the experienced professional team from Williams Sanitary Service, Inc. We are a family-owned and operated company serving Brentwood, CA, and the surrounding area since 1950. We offer comprehensive septic system services to residential and commercial customers in the area, from pumping a septic tank to installing a brand-new one and everything in between. Make Williams Sanitary Service, Inc. your first call for septic services. Call 925-634-4855 today!

Septic Tank Made of Concrete Ring — Brentwood, CA — Williams Sanitary Service, Inc.

We replace and install residential and commercial septic systems. As a full-service septic tank company, we can handle all sizes of jobs in the Contra Costa and Alameda Counties. Call us today for a free estimate.

Regular maintenance will keep your septic tank operating efficiently and effectively. It also helps you avoid costly repairs and protect the environment from contamination. Contact your professional septic service provider, Williams Sanitary Service, Inc., who can offer guidance and perform the necessary maintenance tasks.

We provide septic inspection and discovery services for residential and commercial clients and realtors in the area. An inspection can help identify faults within the septic tank. Make sure you call our professional team at 925-634-4855 to schedule your inspection today. 

Is your toilet running? Maybe your kitchen faucet won't stop leaking? Our Williams Sanitary Service team can take care of simple plumbing issues for you. Don’t hesitate to ask us for a free estimate on any of the following plumbing needs:

  • Camera Inspection
  • Water Heater Repair
  • Drain Cleaning
  • Sump Pump
  • Faucets
  • Backflow Preventers
  • Toilets
  • Gas Lines

Why Choose Us?

  • In Business Since 1950
  • Family-Owned and Operated
  • 24/7 Service Available
  • Free Estimates
  • Phones Answered 24/7
  • Licensed & Certified
  • New Customers Receive $25 Off Their First Pumping

Happy Customers

  • ⭐⭐⭐⭐⭐


    We've lived in our home on septic for 9yrs, the previous owners told us they could never find the septic tank after numerous attempts.  We had tried to have the tank pumped out but no one at the county could tell us where it was.  After talking with the staff at Williams they laid out a plan and sent out a great team to help locate our septic tank.  In 7 minutes they were able to find a tank that had been hidden for 12+ yrs! 

    They quickly dug up both boxes, tested the lines, pumped it out, inspected the boxes and covered the holes like they had never even been there.  Something that was haunting us for for years was fixed in a matter of hours!  EVERYONE from the office staff to the guys in the field were so friendly and so professional!!  I cannot say enough good things about the whole team!

    Thank you Williams Sanitation


    -Kristen , K., CA

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  • ⭐⭐⭐⭐⭐


    Needed a new septic system in place. They are very knowledgeable in what they do. From The front desk, that was always VERY helpful to the guys that came out to do the work. All around great guys, professional and got the job done and then some. I would not hesitate to recommend them for a job. Thanks guys for helping get the process started through to completion. Excellent job!


    -Andrea, B., CA

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  • ⭐⭐⭐⭐⭐


    We've lived in our home on septic for 9yrs, the previous owners told us they could never find the septic tank after numerous attempts.  We had tried to have the tank pumped out but no one at the county could tell us where it was.  After talking with the staff at Williams they laid out a plan and sent out a great team to help locate our septic tank.  In 7 minutes they were able to find a tank that had been hidden for 12+ yrs! 

    They quickly dug up both boxes, tested the lines, pumped it out, inspected the boxes and covered the holes like they had never even been there.  Something that was haunting us for for years was fixed in a matter of hours!  EVERYONE from the office staff to the guys in the field were so friendly and so professional!!  I cannot say enough good things about the whole team!

    Thank you Williams Sanitation


    -Kristen , K., CA

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  • ⭐⭐⭐⭐⭐


    Needed a new septic system in place. They are very knowledgeable in what they do. From The front desk, that was always VERY helpful to the guys that came out to do the work. All around great guys, professional and got the job done and then some. I would not hesitate to recommend them for a job. Thanks guys for helping get the process started through to completion. Excellent job!


    -Andrea, B., CA

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For further information about Williams Sanitary Service, Inc., a free estimate, or to schedule a service, call 925-634-4855.