Area Designations (Activities and Maps)

This page reviewed August 30, 2019

This website area provides information on how area designations for the State ambient air quality standards have changed over time. Below are links to PDF files that show the State area designations adopted by the ARB for each year, beginning in 1989. There are also links to the annual Staff Reports which describe the rationale for each of the changes.

Summaries of Historical Area Designations for State Standards

Links to Area Designation Staff Reports
(Initial Statement of Reasons for Rulemaking)