# Cuprous Oxide; Exemption From the Requirement of a Tolerance
> **Rule** · Final rule. · Published 2015-07-01 · Effective 2015-07-01 · 80 FR 37547
## Document
- **Document number:** 2015-16224
- **Category:** pesticide
- **Federal Register citation:** 80 FR 37547
- **CFR reference:** 40 CFR 180
- **Publication date:** 2015-07-01
- **Effective date:** 2015-07-01
- **EPA docket:** EPA-HQ-OPP-2014-0865
## Abstract

This regulation amends the tolerance exemption for copper in/ on meat, milk, poultry, eggs, fish, shellfish, and irrigated crops when it results from the use of cuprous oxide embedded in polymer emitter heads used in irrigation systems for root incursion prevention. This regulation eliminates the need to establish a maximum permissible level for residues of copper resulting from this use of cuprous oxide.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2015/07/01/2015-16224/cuprous-oxide-exemption-from-the-requirement-of-a-tolerance)
---
*MORVS · CC0 1.0*