# 2026-03366: EPA Refines Tolerances for Pesticides Like Terbacil on Crops 2026-03366, Pesticide Tolerances; Implementing Registration Review Decisions for Certain Pesticides; Terbacil, et al., is a Federal Register rule from Environmental Protection Agency published 2026-02-20, effective 2026-02-20 (as of 2026-06-11). - Canonical: https://policyrisk.com/federal-register/2026-03366 - As of: 2026-06-11 - Plain-text twin of the page above; the HTML and this file carry the same facts. ## Facts - Document number: 2026-03366 - Title: Pesticide Tolerances; Implementing Registration Review Decisions for Certain Pesticides; Terbacil, et al. - Type: Rule - Agencies: Environmental Protection Agency - Citation: 91 FR 8100 - Published: 2026-02-20 - Effective: 2026-02-20 - Comments close: not stated - Significant: no - Touches household money: no - Regulation identifier numbers: 2070-ZA16 - Last updated: 2026-06-11 ## In one line EPA Refines Tolerances for Pesticides Like Terbacil on Crops ## Summary The EPA just updated rules for certain pesticides like Terbacil to keep our food safe and farms running smoothly. If you grow crops, raise animals, make food, or produce pesticides, these changes affect you starting February 20, 2026. You’ve got until April 21, 2026, to raise any concerns, but no big costs or delays are expected—just smarter, safer pesticide rules! ## Abstract The Environmental Protection Agency (EPA or Agency) is finalizing several tolerance actions under the Federal Food, Drug, and Cosmetic Act (FFDCA) that the Agency previously determined were necessary or appropriate during the registration review conducted under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA). During registration review, EPA reviews all aspects of a pesticide case, including existing tolerances, to ensure that the pesticide continues to meet the standard for registration under FIFRA. The pesticide tolerances and active ingredients addressed in this rulemaking are identified and discussed in detail in Unit III. of this document. ## Effects PRIA read - Who this rule affects and deadlines: mixed, low. You are affected if you are an agricultural producer, food manufacturer, or pesticide manufacturer. The rule is effective February 20, 2026, and objections or hearing requests must be filed and received by April 21, 2026 following 40 CFR part 178 instructions. - Widespread tolerance updates and rounding: mixed, medium. EPA finalized changes that revise tolerance expressions, update commodity definitions, and modify tolerance values for numerous pesticides to reflect OECD rounding class practice. These regulatory text changes apply to pesticides listed in Unit III (for example Terbacil, Metolachlor, Cyfluthrin, et… - Tomato tolerance lowered for etridiazole: cost, medium. EPA lowered the tolerance for etridiazole on tomatoes from 0.15 parts per million (ppm) to 0.1 ppm. The prior 0.15 ppm tolerance is given an expiration date of August 19, 2026 to allow adjustment. - New livestock tolerances for pinoxaden: benefit, medium. EPA is establishing new tolerances for pinoxaden in livestock commodities (including goat, hog, horse, and sheep fat, meat, and meat byproducts) because during registration review the Agency determined tolerances were needed to cover potential residues from treated feed items at the same level as c… - EPA certification on small-entity economic impact: benefit, low. EPA certified under the Regulatory Flexibility Act that this action will not have a significant economic impact on a substantial number of small entities. EPA considered public comments about possible small-scale farmer costs but did not change its determination. - 180-day transition for lowered/revoked tolerances: benefit, low. For tolerances that are lowered or revoked, EPA set an expiration date for the prior tolerance of 180 days after publication (i.e., August 19, 2026) to allow producers in exporting members of the World Trade Organization's SPS Agreement time to adapt to the new requirements. - Cyproconazole liver tolerance rounding change: mixed, low. EPA revised cyproconazole tolerances for cattle, goat, horse, and sheep liver from 0.50 ppm to 0.5 ppm to reflect OECD rounding class practice; this change is finalized in 40 CFR 180.485 paragraph (a)(3). ## Related documents - [2026-19071](https://policyrisk.com/federal-register/2026-19071): Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units, 2026-09-17 - [2026-19072](https://policyrisk.com/federal-register/2026-19072): Rescission of the Greenhouse Gas Findings for Fossil Fuel-Fired Power Plants and Repeal of Regulations for Power Plant Greenhouse Gas Emiss…, 2026-09-17 - [2026-18317](https://policyrisk.com/federal-register/2026-18317): Updated Definition of “Waters of the United States”, 2026-09-09 - [2026-14112](https://policyrisk.com/federal-register/2026-14112): Amendments and Nonconformance Penalties for Model Year 2027 and Later Heavy-Duty Highway Engines and Amendments to Inducement Provisions fo…, 2026-07-14 - [2026-13667](https://policyrisk.com/federal-register/2026-13667): Minor New Source Review Program Air Permitting Public Participation Requirements for State Implementation Plans, 2026-07-07 - [2026-13263](https://policyrisk.com/federal-register/2026-13263): Revisions To Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems, 2026-07-01 ## Sources - [2026-03366 on federalregister.gov](https://www.federalregister.gov/documents/2026/02/20/2026-03366/pesticide-tolerances-implementing-registration-review-decisions-for-certain-pesticides-terbacil-et) - [2026-03366 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-02-20/pdf/2026-03366.pdf) ## Related - [Previous: 2026-03354, Hiring Authority for College Graduates](https://policyrisk.com/federal-register/2026-03354) - [Next: 2026-03368, Imidacloprid; Pesticide Tolerance(s)](https://policyrisk.com/federal-register/2026-03368) - [All Federal Register documents](https://policyrisk.com/federal-register) Source: PRIA, https://policyrisk.com/federal-register/2026-03366 (as of 2026-06-11).