# ozone-transport-region-voc — Clean Air Act "major source" emission thresholds by pollutant and area classification

For ozone-transport-region-voc, which major-source test is Part D Title I nonattainment major stationary source; pollutant or pollutant class is volatile organic compounds; area classification (if applicable) is ozone transport region; threshold (tons per year) is 50; definition heading is Major source means any stationary source, recorded from its source on 2026-08-19; source re-checked 2026-09-09.

- **Row ID:** ozone-transport-region-voc _(our reading, not quoted from the source)_
- **Which major-source test:** Part D Title I nonattainment major stationary source _(our reading, not quoted from the source)_
- **Pollutant or pollutant class:** volatile organic compounds _(verified: appears in the quote below)_
- **Area classification (if applicable):** ozone transport region _(verified: appears in the quote below)_
- **Threshold (tons per year):** 50 _(verified: appears in the quote below)_
- **Definition heading:** Major source means any stationary source _(verified: appears in the quote below)_

## What the source says

> For ozone transport regions established pursuant to section 184 of the Act, sources with the potential to emit 50 tpy or more of volatile organic compounds;

## Source

- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-70/subpart-A/section-70.2

Last verified: 2026-09-09. Review by: 2027-02-15.
Part of [Clean Air Act "major source" emission thresholds by pollutant and area classification](https://referencesource.org/clean-air-act-major-source-thresholds/).