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State of California Department of Pesticide Regulation
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Information on Paraquat Dichloride

See all Active Ingredients

Find information on the registration status, continuous evaluation and mitigation measures in California to regulate this active ingredient. An active ingredient is the chemical that makes a pesticide work on a target pest.

Active Ingredient: Paraquat Dichloride
Type of Pesticide: Herbicide
California Registration: Yes
Products Registered
EPA Registration: Yes
Fumigant: No
California Restricted Material: Yes
Toxic Air Contaminant (TAC): No
Volatile Organic Compound (VOC): No
Potential Groundwater Contaminant: No
Reevaluation Status: Active
Chemical Class: None
DPR Chemical Code: 1601

Risk Evaluation and Mitigation Documents

  • April 2025 - Semiannual Report Summarizing the Reevaluation Status of Pesticide Products During the Period of July 1, 2024, Through December 31, 2024
  • January 2025 - Notice of Extension to the Informal Public Comment Period Regarding Preliminary Reports Relative to the Reevaluation of Paraquat
  • December 2024 - Notice of Preliminary Reports Relative to Reevaluation of Paraquat: Informal Public Comment Period
  • December 2024 - Preliminary Ecological Report Relative to Paraquat Dichloride - English pdf  
  • December 2024 - Preliminary Human Health Report Relative to Paraquat Dichloride - English pdf  
  • November 2024 - Notice of Initiation of Reevaluation of Paraquat Dichloride
  • October 2024 - Paraquat Dichloride Products by Registrant - English pdf  
  • September 2024 - Bill Text, Pesticides: Paraquat Dichloride

Historic Documents

  • October 2024 - Semiannual Report Summarizing the Reevaluation Status of Pesticide Products During the Period of January 1, 2024, Through June 30, 2024
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