“We design It, We install It, We Stand behind It.”
America is faced today with the challenge of a rapidly expanding population, greater demand for scarce resources, and the challenge of finding responsible and renewable ways to manage and utilize those resources.

In California, new innovative technologies are being introduced to the market that vastly advance wastewater treatment processes. Engineered Septic Systems (ESS) was formed because we recognize that there is a huge demand for safe, alternative treatment systems that provide approved wastewater treatment that meets the demands of a growing population and protects our increasingly limited water resources. Now, we have those systems.

Featured on the cover of Onsite Installer Magazine!

Click HERE to read about us!


ESS is a pioneer in the field of alternative treatment technologies. We are the premier alternative septic design/build firm servicing the North San Francisco Bay Area, including Napa, Lake, Sonoma, Mendocino, and Marin Counties. You will not find better designed systems, better value, or a more experienced team than ESS!

California License # 888379:   Both C42 (Sanitation) and B (General Construction) licenses.

ESS recommends licensed architects, surveyors, geologists, and/or engineers when needed.

Distributor and installers of:

Active members of:

California Onsite Wastewater Association

National Association of Wastewater TransportersNo

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