Active Ingredient: Chloropicrin
Human Health Risk Assessment and Mitigation
Documents and Activities

Risk Characterization Documents (RCDs) estimate the nature and likelihood of adverse health effects in humans who may be exposed to pesticides.

• August 2016 – Update to the Worker Exposure Scenarios Evaluated in 2012 Chloropicrin Risk Characterization Document (PDF)
• November 2012 – Risk Characterization Document (Exposure to Workers and the General Public) (PDF)
  • October 2012 – Office of Environmental Health Hazard Assessment Comments on the Draft Risk Characterization Document (PDF)
  • January 2012 – Exposure Assessment Document (PDF)
• Toxic Air Contaminant (TAC) Assessment
  • April 2010 – Director's Proposed Decision
  • April 2010 – Scientific Review Panel's Findings
  • February 2010 – Executive Summary
  • January 2010 – Part A - Environmental Fate Review and Exposure Assessment
  • February 2010 – Part B - Human Health Assessment
  • November 2009 – Office of Environmental Health Hazard Assessment Findings on DPR's November 2009 Draft Report for the Scientific Review Panel

Other Documents

• August 2017 – Methyl Bromide, 1,3-Dichloropropene, and Chloropicrin Air Monitoring Results for 2010-2016
• November 2016 – Summary of Ambient Air Monitoring for 1,3-Dichloropropene, Methyl Bromide and Chloropicrin, 2010 - 2015
• May 2015 – Summary of Ambient Air Monitoring for 1,3-Dichloropropene, Methyl Bromide and Chloropicrin, 2010 - 2014
• January 2014 – Results from Air Monitoring Workers during Tarpaulin Cutting Activity of Totally Impervious Film Tarpaulin on Fields Treated with Chloropicrin and 1,3-D (PDF)
• October 2013 – Results from Sampling for Phosgene Using Salad Devices Charged with Chloropicrin and Positioned on Non-Absorbent Surface (PDF)
• May 2013 – Survey of Methyl Bromide and Chloropicrin Air Concentrations during Shanked Field Applications (PDF)
• April 2013 – Relevance of the Bieler-Williams Polly-3 Trend Test in the Analysis of Carcinogenicity of Chloropicrin (PDF)
• March 2013 – Lompoc Monitoring Report
• March 2012 – Results from Dome Sampling for Phosgene Using High Initial Concentrations Of Chloropicrin (Extreme Conditions) In A Field Environment (PDF)
• January 2012 – Results from Air Monitoring a Tarpaulin Cutting and Removal Operation Involving 5-Layer Totally Impervious Film Tarpaulin on a Chloropicrin-Treated Field (PDF)
• January 2012 – Estimation of Exposure of Persons in California to Pesticide Products that Contain Chloropicrin (PDF)
• December 2011 – Compilation of Studies Estimating near Surface Concentrations of 1,3-Dichloropropene or Chloropicrin (PDF)
• January 2010 – Report Title Evaluation of Chloropicrin Priority Illness Episodes Relative To County Permit Conditions, Pesticide Use, and U.S. EPA's Mitigation Measures (PDF)
• January 2010 – Public Exposure to Airborne Chloropicrin In California (PDF)
• July 2010 – Chloropicrin Soil Fumigation Occupational Exposure Data (PDF)
• January 2007 – Air Dispersion Modeling Analysis of Priority Incident 38-MON-05 (PDF)
  • Figures 2-5 (PDF)
  • Figures 6-10 (PDF)
  • Figures 11-Appendix (PDF)
• August 2006 – Final Report on Pesticide Air Monitoring Around a Field Application of Chloropicrin in Santa Barbara County October 2005
  • Analytical Report
  • Photos
• March 2005 – Chloropicrin Results from Air Sample Bags Taken as Part of an Investigation into Priority Investigation 5-SD05 (PDF)
• March 2005 – Review of Chloropicrin Exposure Monitoring Study, Data Package 209842 (PDF)
• January 2005 – Final Report for the 2003 Application Air Monitoring for Chloropicrin in Santa Cruz County
  • Appendices
• January 2004 – Final Report for the 2001 Ambient Air Monitoring for Chloropicrin and Metam Sodium Breakdown Products in Monterey and Santa Cruz Counties
  • Appendices
• January 2004 – Results from Air Monitoring Study Conducted in Southern California in Post-Fumigated Structures Entered by Gas Utility Workers (PDF)
• November 2003 – Final Report for the 2001 Ambient Air Monitoring for Chloropicrin and Metam Sodium Breakdown Products in Kern County
  • Appendices
• March 2003 – >Report for Air Monitoring Around a Bed Fumigation Application of Chloropicrin, Fall 2001
• August 2002 – Comments on the 8-14-02 Chloropicrin Manufacturers Task Force (CMTF) Revised Draft Protocol, "Monitoring of Chloropicrin Emissions from Field and Greenhouse Drip Irrigation Applications and Implied Worker Inhalation Exposure from Applications of Chloropicrin by Shank Injection, Drip Irrigation Systems and at Tree Replant Sites" (Data Package ID# 195883) (PDF)
• July 1998 – Results from Seal Beach Application Crew Monitoring for Methyl Bromide Exposure On May 2, 1998 (PDF)
• April 1990 – A Survey of the Warning Agent Concentration (Chloropicrin) Present Immediately Behind the Tarpaulin of Residences Undergoing Fumigation (PDF)
• August 1987 – Evaluation of Chloropicrin as a Warning Agent and Employee Exposure of Methyl Bromide and Chloropicrin During Structural Fumigation (PDF)
• April 1986 – Studies of Methyl Bromide and Chloropicrin Used as Structural Fumigants in CA 1984 (PDF)
• July 1984 – Additional Monitoring of the Concentrations of Methyl Bromide and Chloropicrin in the Air Downwind from Fields during and After Preplant Soil Fumigations (Shallow Injection) (PDF)
• June 1984 – Additional Monitoring of the Inhalation Exposure of Workers to Methyl Bromide and Chloropicrin During Preplant Soil Fumigations (Shallow Injection) in 1983 (PDF)
• February 1984 – A Study of the Inhalation Exposure of Workers to Methyl Bromide and Chloropicrin During Preplant Soil Fumigations (Shallow Injection) in 1982 - A Preliminary Report (PDF)
• June 1983 – A Method for Sampling and Determining Chloropicrin in Air (PDF)
• April 1983 – A Study of the Levels of Methyl Bromide and Chloropicrin in the Air Downwind from a Field During and After a Preplant Soil Fumigation (Shallow Injection) - A Preliminary Report (PDF)

RMDs identify pesticide exposures that require mitigation in order to further protect human health.

• December 2010 – Risk Management Directive (PDF) – Toxic Air Contaminant Assessment for Residents and Bystanders

• February 2024 – DPR's Chloropicrin Tarpaulin List, Tarpaulins to receive 60% buffer zone reduction credit (PDF)
• September 2017 – Additional Labeling Requirements
• February 2017 – Revised Interim Permit Conditions (PDF)
• February 2016 – Revised Interim Permit Conditions (PDF)
• December 2015 – Determination of Criteria for DPR's List of Tarpaulins that Qualify for a 60% Buffer Zone Reduction Credit for Chloropicrin (PDF)
• December 2015 – Analysis of High Barrier Tarpaulin Chloropicrin Mass Transfer Data Measured Under High Relative Humidity Conditions (PDF)
• April 2015 – Tarpaulins used for Chloropicrin Permit Conditions (PDF)
• January 2015 – FAQ: Regulating Chloropicrin (PDF)
• January 2015 – Control Measures for Chloropicrin Executive Summary (PDF)
  • January 2015 – Chloropicrin Mitigation Document and Appendices 1-3 (PDF)
  • Appendix 4: Memorandum on the Development of Chloropicrin Buffer Zones (PDF)
• January 2015 – Summary of Comments on the Department of Pesticide Regulation's Chloropicrin Mitigation Proposal (PDF)
• October 2014 – Development of Chloropicrin Buffer Zones - Revised (PDF)
• October 2014 – Responses to External Peer Review Comments (PDF)
• March 2014 – External Peer Review of the Department of Pesticide Regulation's Methodology to Develop Buffer Zones and Mitigation Measures for Chloropicrin (PDF)
• May 2013 – Request for Comments on Chloropicrin Mitigation Proposal (PDF) (En Español)
• May 2013 – Summary of Proposed Control Measures for Chloropicrin (PDF) (En Español)
• May 2013 – Chloropicrin Mitigation Proposal and Appendices 1-3 (PDF)
  • Appendix 4 Development of Chloropicrin Buffer Zones (PDF)
  • Public Comments and DPR Responses (PDF)
• March 2013 – Development of Chloropicrin Buffer Zones (PDF)

Enforcement Letters

• February 2017 – ENF 2017-04 – Updates to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium, Appendix K: Chloropicrin and Chloropicrin in Combination with Other Products (Field Fumigant) Interim Recommended Permit Conditions
• March 2016 – ENF 2016-06 – Updates to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium, Appendix K: Chloropicrin and Chloropicrin in Combination with Other Products (Field Fumigant) Interim Recommended Permit Conditions
• April 2015 – ENF 2015-06 - Updates To Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium: Chloropicrin and Chloropicrin in Combination with Other Products (Field Fumigant) Interim Recommended Permit Conditions
• July 2013 – ENF 2013-16 - Updates to Volume 3, Restricted Materials and Permitting: Chloropicrin and Chloropicrin with 1,3-Dichloropropene (Field Fumigant) Recommended Permit Conditions
• May 2013 – ENF 2013-09 - Soil Fumigant 2012 Labeling and Permit Conditions-Questions and Answers
• May 2013 – ENF 2013-06 - Volatile Organic Compound Emissions Reduction Methods Using Totally Impermeable Film (TIF) Tarpaulins
• March 2013 – ENF 2012 -21 (Amended) - Soil Fumigant Phase 2 Label Implementation - Enforcement Status, and Revisions to Restricted Materials and Permitting Compendium Volume 3
• August 2012 – ENF 2012 -16 - Soil Fumigant Label Changes - Phase 2
• October 2011 – ENF 2011-25 - Soil Fumigant 2010 Labeling and Permit Conditions - Questions and Answers
• March 2011 – ENF 2011-09 - U.S. EPA Soil Fumigant Label Changes
• July 2008 – ENF 2008-21- Volatile Organic Compounds (VOC) Field Fumigation Emission Reduction Regulations
• December 2001 – ENF 2001-054 - Field Crop Site Designation on InLine* Soil Fungicide

• January 2022 - Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on Air Monitoring of Workers During Loading and Application of Fumigants
• January 2015 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF) (En Español)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on Chloropicrin Mitigation Measures (PDF) (En Español)
• June 2013 – Chloropicrin Mitigation - Community and Technical Meetings (PDF)
  • Chloropicrin Mitigation Proposal - Community (PDF)
  • Chloropicrin Mitigation Proposal - Technical (PDF)
• May 2013 - Completion of Human Health Risk Assessment (PDF)
• March 2013 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation Chloropicrin Mitigation (PDF)
• October 2012 – California Agricultural Commissioners & Sealers Association, Pesticide Regulatory Affairs Committee Meeting Agenda (PDF)
• August 2012 - Chloropicrin Mitigation Stakeholder Update (PDF)
• August 2012 – Chloropicrin Worker Advocates Meeting Agenda (PDF)
  • Chloropicrin Mitigation Stakeholder Update (PDF) (En Español)
• July 2012 – Chloropicrin TAC Work Group Meeting Agenda (PDF)
  • Chloropicrin Mitigation Stakeholder Update (PDF)
• April 2011 – Chloropicrin TAC Work Group Meeting Agenda (PDF)
  • Off-Site Mitigation Measures on Soil Fumigant Labels (PDF)
  • Development of Flux Profiles for New Chloropicrin Application Methods (PDF)
• July 2009 – Pesticide Registration and Evaluation Committee Meeting Agenda (PDF)
  • Pesticide Registration and Evaluation Committee Meeting Minutes (PDF)
  • Presentation on Public Exposure to Chloropicrin in California (PDF)

• Pesticide Product Database
• Human Health Assessment Branch Memos
• Human Health Assessment Branch Publications, Posters/Abstracts and Presentations
• Worker Health and Safety Reports and Memos
• Environmental Monitoring Branch Publications
  • Environmental Fate Reviews
• Air Monitoring Network
• Pesticide Use Reporting (PUR)
• California Pesticide Illness Query (CalPIQ)
• Environmental Justice (EJ)
• OEHHA Proposition 65 Information
• U.S. EPA Pesticide Chemical Search
• PubChem-Chemical Information