---
kind: "section"
citation: "40 C.F.R. § 61.03"
title: "40"
number: "61.03"
heading: "Units and abbreviations."
url: "https://uscodex.org/cfr/40/61.03"
---

# §61.03. Units and abbreviations.


Used in this part are abbreviations and symbols of units of measure. These are defined as follows:

- (a) **System International (SI) units of measure—**
- (b) **Other units of measure—**
- (c) **Chemical nomenclature—**
- (d) **Miscellaneous—**

## Notes

### Amendments

[42 FR 51574, Sept. 29, 1977, as amended at 54 FR 51704, Dec. 15, 1989]

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 38 FR 8826, Apr. 6, 1973, unless otherwise noted.

### Amendments

[42 FR 51574, Sept. 29, 1977, as amended at 54 FR 51704, Dec. 15, 1989]