Type of Assessment: Registration Review, Proposed Tolerance

Title: Pesticide Tolerance; Exemptions, Petitions, Revocations, etc.: Implementing Registration Review Decisions for Certain Pesticides; Atrazine, et al.

EPA Docket Number: EPA-HQ-OPP-2025-0266-0001

Open For Comments: Dec 11, 2025, 12:00 AM
Comments Due: Feb 9, 2026, 11:59 PM

Summary: The Environmental Protection Agency (EPA or Agency) is proposing to implement several tolerance actions under the Federal Food, Drug, and Cosmetic Act (FFDCA) that the Agency determined were necessary or appropriate during the registration review conducted under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). One significant tolerance change identified was for use of Atrazine on “corn, sweet, forage.” EPA proposes modifying the tolerance level in for ‘‘Corn, sweet, forage’’ from 15 ppm to 1.5 ppm, which is supported by the updated pre-harvest interval. The Agency previously reviewed crop field trial data conducted on sweet corn, reflecting maximum use rates of post-emergent applications of atrazine and a 45-day pre-harvest interval for forage. These data indicate that a tolerance level of 1.5 ppm is adequate to cover potential residues of atrazine in/on corn, sweet, forage following post-emergent application at maximum registered use rates and a 45-day pre-harvest interval for forage. Because the proposed action would lower the existing tolerance, EPA is proposing to add an expiration date for the existing tolerance of 180 days after publication of the final rule in the Federal Register. In addition, EPA proposes to update and clarify description language and tolerance expression, consistent with EPA policy.

Comments must be received on or before February 9, 2026.

Other A.I.s also with information on tolerance changes, additions or revocations in the same notice:

Diquat, 032201
MCPB, 019201
MCPA, 030501
Napropamide
Pirimiphos-Methyl, 108102 or 334300
Fluazifop-P-Butyl, 122805
Clethodim, 121011
Bifenazate
Ethofenprox