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Virginia Administrative Code
Title 9. Environment
Agency 5. State Air Pollution Control Board
Chapter 30. Ambient Air Quality Standards
11/23/2024

9VAC5-30-55. Ozone (8-hour, 0.08 ppm).

A. The primary and secondary ambient air quality standard is 0.08 parts per million, daily maximum 8-hour average.

B. Ozone shall be measured by the reference method described in Appendix D of 40 CFR Part 50, or other method designated as such, or by an equivalent method.

C. The 8-hour primary and secondary ozone ambient air quality standards are met at an ambient air quality monitoring site when the average of the annual fourth-highest daily maximum 8-hour average ozone concentration is less than or equal to 0.08 ppm, as determined in accordance with Appendix I of 40 CFR Part 50.

Statutory Authority

§ 10.1-1308 of the Code of Virginia; §§ 108, 109, 110, 182, and 302 of the federal Clean Air Act; 40 CFR Parts 50, 51, 53, and 58.

Historical Notes

Derived from Virginia Register Volume 20, Issue 24, eff. September 8, 2004; amended, Virginia Register Volume 25, Issue 12, eff. March 18, 2009; Volume 29, Issue 4, eff. November 21, 2012; Volume 33, Issue 4, eff. November 16, 2016; Volume 36, Issue 12, eff. March 4, 2020.

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