Geology · Glossary
Naturally Occurring Asbestos
Updated 2026-07-20
Some California geologic units contain naturally occurring asbestos. Mapped areas can trigger dust-control and disclosure requirements during grading.
What it means
Some California geologic units contain naturally occurring asbestos. Mapped areas can trigger dust-control and disclosure requirements during grading.
Why it matters for land decisions
Confirm how the concept applies to your specific parcel with the city or county planning department and the controlling agency map or ordinance.
- Treat online GIS as a first-pass screen.
- Verify before design, escrow, or lending decisions.
People also ask
What is Naturally Occurring Asbestos?
Some California geologic units contain naturally occurring asbestos. Mapped areas can trigger dust-control and disclosure requirements during grading.
Is a GIS overlay enough to decide?
No. Public GIS is a screening tool. Official determinations come from the governing agency, recorded documents, and licensed professionals when required.
Official sources
Related terms
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Parcel View screens zoning, flood, fire, soils, and planning layers for any California lot — every finding linked to the official source.