15 USC § 8931 - Definitions

---
identifier: "/us/usc/t15/s8931"
source: "usc"
legal_status: "official_prima_facie"
title: "15 USC § 8931 - Definitions"
title_number: 15
title_name: "COMMERCE AND TRADE"
section_number: "8931"
section_name: "Definitions"
chapter_number: 115
chapter_name: "PERFLUOROALKYL AND POLYFLUOROALKYL SUBSTANCES AND EMERGING CONTAMINANTS"
subchapter_number: "III"
subchapter_name: "USGS PERFORMANCE STANDARD"
positive_law: false
currency: "119-84"
last_updated: "2026-04-17"
format_version: "1.1.0"
generator: "[email protected]"
source_credit: "(Pub. L. 116–92, div. F, title LXXIII, § 7331, Dec. 20, 2019, 133 Stat. 2281.)"
---


# § 8931. Definitions

In this subchapter:

**(1)** **Director** The term “Director” means the Director of the United States Geological Survey.

**(2)** **Highly fluorinated compound**

**(A)** **In general** The term “highly fluorinated compound” means a perfluoroalkyl substance or a polyfluoroalkyl substance with at least one fully fluorinated carbon atom.

**(B)** **Definitions** In this paragraph:

**(i)** **Fully fluorinated carbon atom** The term “fully fluorinated carbon atom” means a carbon atom on which all the hydrogen substituents have been replaced by fluorine.

**(ii)** **Perfluoroalkyl substance** The term “perfluoroalkyl substance” means a chemical of which all of the carbon atoms are fully fluorinated carbon atoms.

**(iii)** **Polyfluoroalkyl substance** The term “polyfluoroalkyl substance” means a chemical containing at least one fully fluorinated carbon atom and at least one carbon atom that is not a fully fluorinated carbon atom.

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**Source Credit**: (Pub. L. 116–92, div. F, title LXXIII, § 7331, Dec. 20, 2019, 133 Stat. 2281.)