https://permitsonoma.org/divisions/engineeringandconstruction/wellandsepticsystems/septicsystems(owts)/owtsmanual/owtsmanualupdateprocess
Updating County Septic System Regulations | Regulations and Initiatives | Permit Sonoma
The Sonoma County Board of Supervisors is considering the revised onsite waste treatment systems (OWTS) manual.
regulations and initiativesseptic systempermit sonomaupdatingcounty