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Well and Septic Systems

The Well and Septic Division staff reviews all development proposals that will rely on wells or septic systems. They also review permit applications for septic system repair or upgrade. Their focus is on protecting health by ensuring that water wells are properly constructed and septic systems protect surface and ground water quality. Sonoma County's soils are notoriously poor for septic systems, so this is a sometimes challenging mission.

Sonoma County Rebuilding Together

Sonoma County Wildfires

Water Quality

Water quality information related to the wildfires.

Well Water Recommendations and Requirements After Wildfire Storms

As an owner of a private domestic water well that may be damaged by a wildfire, you may have some concerns about fire related impacts to your well and water system. Sonoma County recommends the well owner perform a visual inspection of their well and water system, including the piping and plumbing that provide water to and throughout your home.

Permitting Guidelines for Fire Damaged Septic Systems

Find out what type of septic system repair and replacement requires a permit and what type does not require a permit for properties impacted by the Sonoma Complex Fires.

WLS-036 Septic System Evaluations for Rebuilding and Temporary Housing (PDF: 615 kB)

Evaluate septic systems on properties impacted by the Sonoma Complex Fire and for properties providing temporary housing connections to existing septic systems with no county records.


Information on the Inspection process.

Inspection Scheduling
Schedule and find out the results of your inspections in one of 3 ways.

Well & Septic Inspection Codes
Find the 3 digit codes needed to schedule inspections.

Contact Information

Contact Well & Septic by Phone
2550 Ventura Avenue
Santa Rosa, CA 95403
38.465225, -122.723293