# section112-combined-hap — Clean Air Act "major source" emission thresholds by pollutant and area classification

For section112-combined-hap, which major-source test is Section 112 HAP major source; pollutant or pollutant class is any combination of such hazardous air pollutants; threshold (tons per year) is 25; 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:** section112-combined-hap _(our reading, not quoted from the source)_
- **Which major-source test:** Section 112 HAP major source _(our reading, not quoted from the source)_
- **Pollutant or pollutant class:** any combination of such hazardous air pollutants _(verified: appears in the quote below)_
- **Threshold (tons per year):** 25 _(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 pollutants other than radionuclides, any stationary source or group of stationary sources located within a contiguous area and under common control that emits or has the potential to emit, in the aggregate, 10 tons per year (tpy) or more of any hazardous air pollutant which has been listed pursuant to section 112(b) of the Act, 25 tpy or more of any combination of such hazardous air pollutants, or such lesser quantity as the Administrator may establish by rule.

## 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/).