Welcome to the CAPCOA Website on Naturally Occurring Asbestos (NOA) This site provides a ready resource to important information relevant to NOA in California. Please note that NOA conditions vary from one air district to another.

Part 1: Documents Available for Download

General Information:

Health Effects:

Maps of Asbestos Areas:

County Specific Information:


Sampling and Measurement:

Technical Reports:

Part 2: Websites With Information Pertaining to Asbestos/NOA

California Geological Survey Website on Asbestos

CARB Website on Asbestos

CARB Regulations – Asbestos ATCM for Surfacing Applications

CARB Regulations – Asbestos ATCM for Construction, Grading, Quarrying and Surface Mining

OEHHA website fact sheet on asbestos

USEPA Region 9 NOA Website

El Dorado County Board of Education – list of NOA-related documents