Area Designations (Activities and Maps)

This page reviewed September 14, 2011

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

• Ozone (PDF 8KB)
• PM2.5 (PDF 7KB)(fine particulate matter)
• PM10 (PDF 7KB) (suspended particulate matter)
• Carbon Monoxide (PDF 12KB)
• Nitrogen Dioxide (PDF 7KB)
• Sulfur Dioxide (PDF 11KB)
• Sulfates (PDF 7KB)
• Hydrogen Sulfide (PDF 12KB)
• Lead (PDF 11KB)
• Visibility Reducing Particles (PDF 7KB)

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

• 1989 Staff Report
• 1990 Staff Report
• 1991 Staff Report
• 1992 Staff Report
• 1993 Staff Report
• 1994 Staff Report
• 1995 Staff Report
• 1996 Staff Report
• 1997 Staff Report
• 1998 Staff Report
• 1999 Staff Report
• 2000 Staff Report
• 2001 Staff Report
• 2002 Staff Report
• 2003 Staff Report
• 2004 Staff Report
• 2005: No staff report
• 2006 Staff Report
• 2007 Changes by Operation of Law
• 2008: No staff report
• 2009: No staff report
• 2010 Staff Report
• 2011 Staff Report

Comments and questions regarding this subject may be sent to:

Ms. Theresa Najita
Staff Air Pollution Specialist
Air Quality Data Branch
Planning and Technical Support Division
California Air Resources Board
P.O. Box 2815
Sacramento CA 95812

(916) 322-7297

tnajita@arb.ca.gov