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Virginia regulations · Through 2026 Regular Session (effective July 1, 2026)

9VAC5-20-205: Prevention of significant deterioration areas

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Where this section sits in the code
  1. Title 9. Environment
  2. Agency 5. State Air Pollution Control Board
  3. Chapter 20. General Provisions
  4. Part II. Air Quality Programs

A. Prevention of significant deterioration areas are geographically defined below by locality for the following criteria pollutants:

1. Particulate matter.

All areas not designated nonattainment for particulate matter in 9VAC5-20-204.

2. Sulfur dioxide.

All areas not designated nonattainment for sulfur dioxide in 9VAC5-20-204.

3. Carbon monoxide.

All areas not designated nonattainment for carbon monoxide in 9VAC5-20-204.

4. Ozone (volatile organic compounds):

All areas not designated nonattainment for ozone in 9VAC5-20-204.

5. Nitrogen oxides.

All areas not designated nonattainment for nitrogen oxides in 9VAC5-20-204.

6. Lead.

All areas not designated nonattainment for lead in 9VAC5-20-204.

B. All areas of the state are geographically defined as prevention of significant deterioration areas for the following pollutants:

Fluorides

Sulfuric acid mist

Total reduced sulfur:

Hydrogen sulfide

Methyl mercaptan

Dimethyl sulfide

Dimethyl disulfide

Reduced sulfur compounds:

Hydrogen sulfide

Carbon disulfide

Carbonyl sulfide

Municipal waste combustor organics (measured as total tetra-chlorinated through octa-chlorinated dibenzo-p-dioxins and dibenzofurans)

Municipal waste combustor metals (measured as particulate matter)

Municipal waste combustor acid gases (measured as the sum of SO2 and HCl)

C. The classification of prevention of significant deterioration areas is as follows:

1. Class I.

a. Federal -- James River Face Wilderness Area (located in AQCR 2) and Shenandoah National Park (located in AQCR 2 and AQCR 4).

b. State -- None.

2. Class II -- All areas of the state not designated in Class I.

3. Class III -- None.

D. The area classification prescribed in subsection C of this section may be redesignated in accordance with 40 CFR 52.21(e), (g), (u) and (t).

Collected 2026-09-14T04:48:02Z. Source file · JSON

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