The California Office of Environmental Health Hazard Assessment (OEHHA) has officially announced its plan to designate atrazine as a cancer-causing agent under the state’s Proposition 65 framework.

This proposed regulatory update is being initiated through the state’s “Labor Code” listing pathway. For businesses manufacturing or distributing products that may result in exposure to atrazine, this represents a significant compliance development that could trigger new warning label obligations. 

Industry stakeholders and interested parties have an opportunity to participate in the regulatory process. The OEHHA has opened a public feedback period, and all comments regarding this intent to list must be submitted no later than November 9, 2026. 

Companies are encouraged to proactively review their material formulations and supply chains to assess potential impacts. For further details on the proposed listing and the submission process, contact us today.