40 CFR § 158.355 - Enforcement analytical method.

---
identifier: "/us/cfr/t40/s158.355"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 158.355 - Enforcement analytical method."
title_number: 40
title_name: "Protection of Environment"
section_number: "158.355"
section_name: "Enforcement analytical method."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "E"
subchapter_name: "PESTICIDE PROGRAMS"
part_number: "158"
part_name: "DATA REQUIREMENTS FOR PESTICIDES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "7 U.S.C. 136-136y; 21 U.S.C. 346a."
regulatory_source: "72 FR 60957, Oct. 26, 2007, unless otherwise noted."
cfr_part: "158"
---


# 158.355 Enforcement analytical method.

An analytical method suitable for enforcement purposes must be provided for each active ingredient in the product and for each other ingredient or impurity that the Agency determines to be toxicologically significant.