Naturally Occurring Asbestos

Learn about the Air District’s Naturally Occurring Asbestos Program and find notification forms, regulatory information, and more.

Asbestos is a naturally occurring mineral often used in building materials and construction. Because asbestos has been proven to cause serious and fatal diseases, it is strictly regulated in its use as a building material and where it occurs naturally.

Naturally Occurring Asbestos Program

To reduce public exposure to naturally occurring asbestos, the Air District regulates all construction and mining activities that produce dust potentially containing naturally occurring asbestos. The Airborne Toxic Control Measure places requirements on the following activities in areas where naturally occurring asbestos is likely to be found:

  • Road construction and maintenance.
  • Construction and grading.
  • Quarrying and surface mining.


Below are asbestos application and notification forms, regulatory information, and general information about naturally occurring asbestos.


Regulatory Information

General Information

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Compliance & Enforcement
General Compliance Information


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Last Updated: 4/24/2018