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On this Page
  • Recent Reports and Announcements
  • Risk Evaluation and Mitigation Documents
  • Historic Documents

Information on Simazine

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: Simazine
Type of Pesticide: Herbicide
California Registration: Yes
Products Registered
EPA Registration: Yes
Fumigant: No
California Restricted Material: Yes
Toxic Air Contaminant (TAC): Yes
Volatile Organic Compound (VOC): No
Potential Groundwater Contaminant: Yes
Reevaluation Status: None
Chemical Class: Triazine
DPR Chemical Code: 531

Recent Reports and Announcements

  • Human Pesticide Exposure Assessment - Simazine
  • Director's AB 2021 Response Concerning Simazine
  • Simazine
  • Study 221-Demonstration Study on Chemigation of Simazine and Diuron on Citrus Orchard in Tulare County

Risk Evaluation and Mitigation Documents

  • Please also refer to the following: July 2023 - Risks From Human Exposure to Atrazine and its Degradates in Groundwater - English pdf  
  • May 2022 - Risks From Human Exposure to Simazine Residues in Groundwater - English pdf  
  • June 2013 - Simazine Risk Characterization Document - English pdf  

Historic Documents

  • July 2016 – Mitigation Scoping Document
  • February 2014 – Completion of Comprehensive Risk Assessment for the Active Ingredient Simazine
  • May 2013 – Exposure Assessment Document
  • 2012 – Hazard Identification for Reproductive and Developmental Toxicity of Simazine
  • June 2004 – Exposure of Herbicide Handlers in the Caltrans Vegetation Control Program
  • March 2003 – Report of Ambient Air Monitoring for Pesticides in Lompoc, California
  • June 2002 – Simazine Runoff Losses from a Cover Cropped Citrus Orchard
  • November 2001 – Initiation of Risk Assessment Process for the Active Ingredient Simazine
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