# ozone-nonattainment-voc-nox-extreme — Clean Air Act "major source" emission thresholds by pollutant and area classification

For ozone-nonattainment-voc-nox-extreme, which major-source test is Part D Title I nonattainment major stationary source; pollutant or pollutant class is volatile organic compounds or oxides of nitrogen; area classification (if applicable) is Extreme; threshold (tons per year) is 10; 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-nonattainment-voc-nox-extreme _(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 or oxides of nitrogen _(verified: appears in the quote below)_
- **Area classification (if applicable):** Extreme _(verified: appears in the quote below)_
- **Threshold (tons per year):** 10 _(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 nonattainment areas, sources with the potential to emit 100 tpy or more of volatile organic compounds or oxides of nitrogen in areas classified or treated as classified as “Marginal” or “Moderate,” 50 tpy or more in areas classified or treated as classified as “Serious,” 25 tpy or more in areas classified or treated as classified as “Severe,” and 10 tpy or more in areas classified or treated as classified as “Extreme”; except that the references in this paragraph to 100, 50, 25 and 10 tpy of nitrogen oxides shall not apply with respect to any source for which the Administrator has made a finding, under section 182(f)(1) or (2) of the Act, that requirements under section 182(f) of the Act do not apply;

## 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/).