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

Information on Dacthal (DCPA)

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: Dacthal (DCPA)
Type of Pesticide: Herbicide
California Registration: Suspended
Products Registered
EPA Registration: No
Fumigant: No
California Restricted Material: No
Toxic Air Contaminant (TAC): No
Volatile Organic Compound (VOC): No
Potential Groundwater Contaminant: No
Reevaluation Status: None
Chemical Class: Phthalate
DPR Chemical Code: 179

Recent Reports and Announcements

  • Correlating Agricultural Use with Ambient Air Concentrations of Chlorthal-dimethyl During the Period of 2011–2014
  • Legal Agricultural Use Determination for DCPA Degradate Detections in California
  • Director’s Decision in Response to the Pesticide Registration and Evaluation Committee's Subcommittee Findings Regarding the Detection of Chlorthal-Dimethyl Degradation Products in Ground Water
  • Chlorthal-Dimethyl Findings by the Subcommittee of the Pesticide Registration and Evaluation Committee
  • Study 300: Groundwater Monitoring for DCPA and Its Degradation Products MTP and TPA

Risk Evaluation and Mitigation Documents

  • October 2021 - Study 300: Groundwater Monitoring for DCPA and its Degradation Products MTP and TPA - English pdf  
  • November 2018 - Chlorthal-Dimethyl Findings by the Subcomittee of the Pesticide Registration and Evaluation Committee - English pdf  
  • January 2018 - Legal Agricultural use Determination for DCPA Degradate Detections in California - English pdf  
  • September 2017 - The Qualification of Method EMON-SM-05-040 as Unequivocal According to Criteria in the Pesticide Contamination Prevention Act - English pdf  
  • February 2017 - Evaluation of the Potential Human Health Effects from Drinking Ground Water Containing Dacthal (DCPA) Degradates - English pdf  
  • February 2016 - Correlating Agricultural use with Ambient Air Concentration of Chlorthal-Dimethyl During the Period of 2011 - 2014 - English pdf  

Historic Documents

  • Pesticide Contamination Prevention Act Review Process Triggered by Detections of Chlorthal Dimethyl in Ground Water
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