Sonoma County OWTS Revision 9
The North Coast Regional Board officially approved the new Sonoma County OWTS Manual on June 5, 2026. V9.0 of the OWTS Manual is now in effect.
How Septic Systems Work
A septic system is an underground wastewater treatment and dispersal system commonly used in rural areas where centralized sewer systems are not available. It’s designed to safely treat and dispose of household wastewate…
New Septic Requirements
Sonoma County staff have implemented necessary changes to clarify regulations, address gaps, and introduce new rules focused on stream or river impairments and Total Maximum Daily Loads (TMDLs)—the limit of pollutants a …
Site Evaluation vs. Pre-percolation Testing
Is there a difference between a Site Evaluation and Pre-Percolation Test?
Soil and Your Septic System
Soil plays a crucial role in the functioning of septic systems. Septic systems are decentralized wastewater treatment systems commonly used in areas where centralized sewer systems are not available. The importance of so…
Septic System Sizing
The size and capacity of a septic system should be designed to accommodate the wastewater generated by a household, which is influenced by factors like the number of toilets.
Septic Smart Week – Part I
To kick off this ‘smart’ week we are going to start with breaking down the steps to understanding what it takes to get a septic system for your project. It can be a daunting task, even if you’ve had prior experience and …