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Calcium Carbonate; Exemption From the Requirement of a Pesticide Tolerance

Detected August 15, 2026 · in Pesticide & Pest-Control Applicators

EPA exempts calcium carbonate (CAS # 471-34-1) from the requirement of a pesticide tolerance when used in accordance with label directions, meaning residues on all food commodities are permitted without a tolerance.

Aforeworn detected this change in the Pesticide & Pest-Control Applicators space on August 15, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Low urgency. Pesticide applicators and growers using calcium carbonate products on food commodities. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Effective immediately upon publication (August 17, 2026).. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Pesticide & Pest-Control Applicators continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.

What changed

Calcium carbonate is now exempt from the requirement of a pesticide tolerance for residues on all food commodities, provided it is used according to label directions.

Who it affects

Pesticide applicators and growers using calcium carbonate products on food commodities.

What you must do

No immediate action required; continue using calcium carbonate products as labeled. No new compliance obligations are introduced.

Deadline

Effective immediately upon publication (August 17, 2026).

Source: https://www.federalregister.gov/documents/2026/08/17/2026-16720/calcium-carbonate-exemption-from-the-requirement-of-a-pesticide-tolerance

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