---
kind: "section"
citation: "40 C.F.R. § 80.9"
title: "40"
number: "80.9"
heading: "Rounding."
url: "https://uscodex.org/cfr/40/80.9"
---

# §80.9. Rounding.

- (a) Test results and calculated values reported to EPA under this part must be rounded according to [40 CFR 1090.50(a) through (d)](/cfr/40/1090.50.md?p=a..d).
- (b) Calculated values under this part may only be rounded when reported to EPA.
- (c) Reported values under this part must be submitted using forms and procedures specified by EPA.

## Notes

### Amendments

[88 FR 44563, July 12, 2023]

### Authority

Authority: 42 U.S.C. 7414, 7521, 7542, 7545, and 7601(a).

### Source

Source: 38 FR 1255, Jan. 10, 1973, unless otherwise noted.

### Amendments

[88 FR 44563, July 12, 2023]