Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 5 - STATE AIR POLLUTION CONTROL BOARD
Chapter 30 - AMBIENT AIR QUALITY STANDARDS
Section 9VAC5-30-68 - Particulate matter (PM 2.5)

Universal Citation: 9 VA Admin Code 5-30-68

Current through Register Vol. 41, No. 3, September 23, 2024

A. The national primary ambient air quality standards for PM2.5 are 9.0 micrograms per cubic meter (µg/m3) annual arithmetic mean concentration and 35 µg/m3 24-hour average concentration measured in the ambient air as PM2.5 (particles with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers) by either:

1. A reference method based on Appendix L to 40 CFR Part 50 and designated in accordance with 40 CFR Part 53 ; or

2. An equivalent method designated in accordance with 40 CFR Part 53.

B. The primary annual PM2.5 standard is met when the annual arithmetic mean concentration, as determined in accordance with Appendix N to 40 CFR Part 50, is less than or equal to 9.0 µg/m3.

C. The primary 24-hour PM2.5 standard is met when the 98th percentile 24-hour concentration, as determined in accordance with Appendix N to 40 CFR Part 50, is less than or equal to 35 µg/m3.

Statutory Authority: § 10.1-1308 of the Code of Virginia; Clean Air Act §§ 108, 109, 302; 40 CFR 50.20, 40 CFR Part 53, 40 CFR Part 58.

Disclaimer: These regulations may not be the most recent version. Virginia may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.