---
kind: "section"
citation: "30 C.F.R. § 57.5015"
title: "30"
number: "57.5015"
heading: "Oxygen deficiency."
url: "https://uscodex.org/cfr/30/57.5015"
---

# §57.5015. Oxygen deficiency.


Air in all active workings shall contain at least 19.5 volume percent oxygen.


## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.