California Enacts Narrower PFAS Pesticide Disclosure Law After Dropping Proposed Bans

The final law defines perfluoroalkyl and polyfluoroalkyl substances as fluorinated organic chemicals containing at least one fully fluorinated carbon atom. A "PFAS pesticide ingredient" is a PFAS intentionally added to a pesticide as an active, adjuvant or inert ingredient.

By 1 January 2028, or by the posting of the pesticide-use reporting database containing 2026 data if that happens earlier, the Department of Pesticide Regulation must identify whether reported pesticides contain PFAS pesticide ingredients. PFAS must also become a category of interest in the database, and the department must include use trends in its annual and other relevant reporting.

Separately, by 1 January 2028, the department must publish a list of all registered pesticides containing PFAS pesticide ingredients and send it to each county agricultural commissioner. It must update the online and county lists within 60 calendar days after registering another covered pesticide.

What Changed And What Remains Unchanged

The enacted text differs substantially from the version described in Foresight's April report on the proposed California PFAS pesticide ban. The final law does not require PFAS warning labels, classify covered pesticides as restricted materials, prohibit selected PFAS active ingredients in 2030 or prohibit all intentionally added PFAS pesticides in 2035.

Existing registration, sale and use requirements therefore remain the legal baseline. The law adds transparency and data-management duties, not a present market-access prohibition. It also contains no product exemption, concentration threshold or de minimis provision within its intentionally added ingredient definition.

This narrowing matters commercially. Public identification may still affect procurement, customer screening and future policy, but manufacturers should not plan withdrawals on the assumption that the abandoned phase-out dates survived enactment. Foresight's PFAS tracker and pesticides tracker provide the wider regulatory context.

Practical Implications For Pesticide Supply Chains

Registrants should map active, adjuvant and inert ingredients against the statutory definition, confirm intentionally added status with suppliers and reconcile product records with California use reporting. Dealers and growers face no new ban, permit or warning-label duty under Chapter 531, but should expect greater public visibility from 2028.

California has shifted from immediate substance control to information infrastructure. That can reduce near-term reformulation pressure while creating the product-level evidence base for later restrictions, enforcement priorities or purchasing policies.

Practical call to action: Build a California PFAS pesticide inventory that distinguishes intentionally added active, adjuvant and inert ingredients, and verify which evidence can support the department's future public list.