Sonoma County · Hazard screen

Sonoma County soils (SSURGO) screening

For Sonoma County soils (SSURGO) diligence: screen the specific APN in Parcel View, read the mapped soils (SSURGO) finding against the parcel polygon, then verify on the official source and with Sonoma County planning before you buy, finance, or entitle.

Updated 2026-08-29

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Useful sources for searching: Official sources to verify buildability ↓

Sonoma County soils (SSURGO) context

Screen USDA SSURGO soil map units for parcels in Sonoma County as a first pass for septic and agricultural context. Field perc tests and geotech still control design.

Buyers, agents, and developers searching “Sonoma County soils (SSURGO)”, “Sonoma zoning”, or “is this lot buildable” should treat GIS as a fast first pass—not a permit. Start with the county overview, then screen a specific APN for mapped overlap.

How Parcel View helps

Parcel View intersects public soils (SSURGO) layers with the parcel polygon and shows source links so you know exactly what to verify next with Sonoma County and the publishing agency.

Next steps

Confirm the APN on the Sonoma County assessor map.

Screen the parcel in Parcel View for soils (SSURGO) overlap.

Open the official source linked on the finding.

People also ask

How do I check soils (SSURGO) on a Sonoma County parcel?

Run a Parcel View screen on the APN, review the soils (SSURGO) finding, then verify on the official source and with Sonoma County planning.

Does every parcel in Sonoma County have the same soils (SSURGO) risk?

No. soils (SSURGO) is parcel-specific. Adjacent lots can differ because floodplains, FHSZ boundaries, soil map units, and zoning districts do not follow ownership lines.

Is a Sonoma County soils (SSURGO) screen an official determination?

No. It is informational public-GIS screening. Agencies and licensed professionals control final decisions, permits, and insurance underwriting.

What should I do after a soils (SSURGO) flag in Sonoma County?

Open the linked official source, compare vintages and map panels, then ask Sonoma County planning (and your lender/surveyor as needed) how the finding affects your specific use.

Official sources

Last verified 2026-08-29. Re-check agency maps before decisions — vintages change.

Related

Sonoma County Guide Glossary Buildable land

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Parcel View checks official public GIS for zoning, flood, fire, soils, and planning — every finding linked to the source.

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