Virginia Regulatory Town Hall
Department of Environmental Quality
Air Pollution Control Board
Ambient Air Quality Standards [9 VAC 5 ‑ 30]
Action is Exempt from Article 2 of the Administrative Process Act
Ambient Air Quality Standards (Rev. F06)
Action 2388
General Information
Action Summary Chapter 30 of the Regulations for the Control and Abatement of Air Pollution contains the specific criteria pollutant standards set out in 40 CFR Part 50. The standard for particulate matter with an aerodynamic diameter less than or equal to 2.5 micrometers (PM2.5) was revised to add a new 24-hour standard of 35 µg/m3. The current 24-hour standard of 65µg/m3 is being retained during the transition to the new standard. Transitional language was added to clarify implementation of these standards. The annual PM2.5 standard of 15 µg/m3 remains unchanged. Obsolete language referencing the annual PM10 standard was removed. Finally, certain reference conditions were added.
Chapters Affected Only affects this chapter.
Executive Branch Review This Action is exempt from Article 2 of the Administrative Process Act. The normal executive branch review process is not required. As such, it can be submitted directly for publication and is effective upon publication.
Exempt Citation: Section 2.2-4006 A 4 c of the Code of Virginia
RIS Project Yes  [000844]
New Periodic Review This action will not be used to conduct a new periodic review.
Stages associated with this regulatory action.
Stage ID Stage Type Status
4170 Final Stage complete. This regulation became effective on 08/01/2007.
Contact Information
Name / Title: Karen G. Sabasteanski 
Address: 629 East Main Street
P.O. Box 1105
Richmond, VA 23218
Email Address:
Phone: (804)698-4426    FAX: (804)698-4510