Complete Onsite Wastewater Solutions

Acorn Onsite, Inc. Provides complete start to finish
septic systems. We provide engineering, installation,
maintenance, pumping, on-going service, problem
diagnostics, and anything relating to septic systems.

Please call or email us today to discuss the specific of your site with an engineer. Call us at (925) 447-5200 or email Speak with an engineer not just a salesman.

Engineering Services

Soil profiles, percolation testing, county permits, convential systems, alternative systems, pretreatment, consulting, problem diagnosis, wet weather testing, and more.


We provide an intelligent approach towards your septic system installation. We are experiened with all types of septic systems and will install your in an orderly fashion.


All septic systems need some level of maintenance. Maybe it's just pumping, maybe lines need to be flushed, or your pretreatment system needs to be checked. We handled all this in house with our own trucks and equiptment.

Problem Diagnosis

Problems do come up. Give us a call and we can help you out.

Speak with an engineer not just a salesman. (925) 447-5200

Real Estate Insepctions

We can help you through the purchase of your next home or raw land. The septic system on that property is an important part. Call us up and we can help you through the steps. 

Acorn Onsite, Inc.
(925) 447 - 5200
2288 Buena Vista Avenue
Livermore, CA

Complete Septic Systems
CSLB# 499418

Call us for your wastewater needs.

Serving Central California

Counties of: Alameda, Contra Costa, Santa Clara, San Juaquin, Stanislaus, Tuolumne, Calaveras, Alpine, Amador, El Dorado, Sacramento, Solano, Yolo, Napa

CONTACT FORM OR CALL (925) 447-5200

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About Acorn Onsite, Inc.

Acorn Onsite, Inc. Provides complete solutions for 

onsite wastewater handling. We have been in the 

wastewater industry since 1980. We have done 

projects for residential dwellings, commercial 

facilities, wineries, event centers, and many other 

facilities. We have been providing Alameda, Contra 

Costa, Santa Clara, San Joaquin, Solano, and 

surrounding counties with complete septic systems 

since 1980 and will happily include you as another 

satisfied customer.

Please call or email us today to discuss the specific of your site with an 

engineer. Call us at (925) 447-5200 or email Speak 

with an engineer not just a salesman.

Our Business

Acorn Onsite, Inc. provides start to finish septic 

systems. Engineering, Installation, Maintenance, 

Supplies, and Pumping.


Acorn Onsite, Inc. provides all septic systems services under one roof.

Acorn Onsite, Inc. Provides all services for septic systems-start to finish and through to the ongoing maintenance.

All of are services are provided under one company or we can provide some of our services and we cooperate with other firms or consultants. We provide septic system and onsite wastewater treatment system service including:

  • Consulting
  • County permits
  • Engineering (conventional, alternative, pre-treatment)
  • New, replacement, and upgraded systems
  • Installation
  • Maintenance
  • Pumping
  • Problem Diagnosis
  • Percolation testing
  • Soil Profiles
  • Wet weather testing
  • All services relating to septic systems
  • Supplies
  • Real Estate Inspections

We offer all of our services under one company, can provide just engineering services for another firm's construction, maintenance and advice for your onsite wastewater needs. Call us today (925) 447-5200 to discuss your site specific needs.

Call us today to discuss your project     
                   (925) 447-5200


Acorn Onsite, Inc. is proud to be a California Licensed contractor. CSLB # 499418

Acorn Onsite, Inc. is also proud to be a Registered Professional Engineer. Board of Professional Engineers and Land Surveyors License #66172

Septage pumping permits issued by the counties we service septic tanks in.

Our Business

Acorn Onsite, Inc.'s unique for the industry approach of providing all septic system services under one company will benefit you, the customer, by having the skills, knowledge, understanding, and tools for the complete project-start to finish.

Septic System Basics

Every septic system is unique. A septic system is based upon site specific conditions, information, and site uses. A Septic System-or Onsite Wastewater Treatment System-consists of a septic tank and disposal field.

Septic Tank

The septic tank provides primary settling and treatment to occur. A typical residential septic tank is about 1500 gallons divided into two compartment. The solids are settled to the bottom and oil float on the surface. The middle layer provides a clear zone that flows through the baffle into the second 

compartment. The effluent flows from the second compartment out to the leach field.

Leach Field

All leach fields are different, but the purpose of all leach fields is to distribute the effluent to allow percolation into the soil. Leach fields distribute the effluent into the soil where the soil treats the effluent and allows for percolation.

Leach fields are sized based on the soil absorption, topography, and other site specific conditions. Call us today (925) 447-5200 to discuss the specifics for your site and speak with an engineer to discuss a plan of action for your onsite wastewater needs. We don't want you to waste your money and we will give you options for the most appropriate long term solution for your onsite wastewater needs.

Location We Serve

We are based in Livermore, CA. Acorn Onsite, Inc. Provides septic system, Onsite Wastewater Treatment services throughout Central California including the following regions:

  • Alameda County
  • Livermore, Mines Road, Tesla, Sunol, Kilkare Woods, Pleasanton, Tri-Valley, 
  • Canyon Lands, Castro Valley, San Ramon, Hayward, Altamont Pass,
  • Contra Costa County
  • Walnut Creek, Lafayette, San Ramon, Danville, Tassajara, Morgan Territory, 
  • Marsh Creek, Camino Diablo, Brentwood, Byron, Antioch, Concord, Briones, Orinda, Moraga
  • Santa Clara County (primarily engineering only)
  • San Joaguin County (primarily engineering only)
  • Stanislaus County (primarily engineering only)
  • Tuolumne County (primarily engineering only)
  • Calaveras County (primarily engineering only)
  • Alpine County (primarily engineering only)
  • Amador County (primarily engineering only)
  • El Dorado County (primarily engineering only)
  • Sacarmento County (primarily engineering only)
  • Solano County (primarily engineering only)
  • Yolo County (primarily engineering only)
  • Napa County (primarily engineering only)

Septic System Care

Even the best septic system needs to be maintained. Please call Acorn
Onsite, Inc. to speak to an Engineer about proper care.

The usage and sizing of the septic tank will dictate the pumping interval. Generally a residential septic tank should be pumped every 3 to 5 years.

To Have Optimal Performance Follow These Guidelines:
Keep vehicles away from the system, DO NOT drive over tank or leach field.
Do not plant trees or shrubs near drain fields, roots will eventually clog the lines.
Dispose of household chemicals properly. Do not pour them down the drain.
Distribute laundry throughout the week to avoid overloading on one day.
Do not use the toilet as a trash can. Flush only toilet paper and waste down.
Monitor your tank yearly and have it pumped every 3 to 5 years.
Outlet Filters:
If installed, outlet filters should be cleaned yearly, simply hose off the built up solids. If an outlet filter is not installed please ask about the
benefits the next time the tank is pumped. If the filter has been damaged
or questions arise please call Acorn Onsite, Inc at (925) 447-5200.

2288 Buena Vista Avenue
Livermore, CA 94550

Phone: (925) 447-5200
Fax: (925) 447-0919

Acorn Onsite, Inc. Is an engineering and construction firm based out of 2288 Buena Vista Avenue, Livermore, CA 

94550. CSLB # 499419, serving Alameda County, Contra Costa County, Santa Clara County, San Joaquin County, 

and surrounding areas in Central California.