June 6, 2025 — SACRAMENTO – The Division of Pesticide Regulation (DPR) and the Workplace of Environmental Well being Hazard Evaluation (OEHHA) at this time introduced subsequent steps within the joint-and-mutual growth of laws to limit 1,3-dichloropropene (1,3-D) use to deal with most cancers dangers for occupational bystanders.
After the preliminary 45-day public remark interval on the proposed laws closed in January 2025, DPR and OEHHA reviewed the feedback and scientific peer evaluations. Restricted regulatory modifications are proposed on the laws, and they’re specified within the Discover of Proposed Modifications. Public feedback will likely be accepted on the regulatory modifications and the scientific peer evaluation as a part of a 15-day remark interval, open June 5 by the top of day June 20.
To evaluation the proposed modifications to the laws, go to DPR’s web site. Feedback on the modifications to the proposed laws will be submitted to DPR by the net remark portal SmartComment, or despatched by e-mail to dpr24001@cdpr.ca.gov.
The Proposed Regulatory Motion Would Guarantee That Restrictions on 1,3-D Use to Tackle Most cancers Dangers to Occupational Bystanders Are Carried out on January 1, 2026.
DPR and OEHHA intend to finish the proposed rulemaking in a well timed method and to implement mitigation to guard occupational bystanders by the following 1,3-D allowing season. The proposed laws are based mostly on scientific knowledge and out there methodology, in addition to OEHHA’s suggestions to DPR to deal with most cancers dangers to occupational bystanders.
Particularly, the proposed laws would require:
- A minimal distance between 1,3-D software websites and other people, significantly farmworkers working in close by fields (referred to as buffer zones). This expands on the setback necessities in earlier laws requiring particular distances between 1,3-D software websites and houses and different occupied buildings.
- A requirement for DPR to proceed to guage occupational danger related to 1,3-D use and report on an annual foundation. If essential, and in session with OEHHA, DPR will likely be required to develop further protections based mostly on its annual analysis of occupational danger. The annual analysis will embody an evaluation of accessible knowledge, assumptions and strategies to estimate 1,3-D danger and, if essential, replace assumptions and strategies to tell further actions.
Figuring out Further Methodologies to Analysis Potential Pathways of Publicity to 1,3-D in Agricultural Communities
Public feedback and peer evaluation recognized conflicting or inconsistent assumptions relating to potential pathways for publicity to 1,3-D. For instance, public commenters and peer reviewers emphasised the supply of strategies to research mixed near-field and regional ambient air concentrations and the necessity for analysis to help the present assumptions about the place employees are current (for instance, how a lot work is carried out on the fringe of a area), the variety of functions close by, the size of publicity throughout a workday, and respiratory charges for employees. These feedback confirmed the necessity for the requirement within the presently proposed laws that may require DPR to yearly evaluation the effectiveness of the mitigation and the assumptions used to guage occupational danger.
DPR and OEHHA are dedicated to analyzing these points completely to think about if additional mitigation proves essential. Nonetheless, at this juncture, DPR and OEHHA don’t suggest additional mitigation measures however will evaluation additional public remark to find out whether or not further modifications to the regulatory textual content are applicable.
Following the shut of the present public remark interval, if the regulation is finalized with out additional modification, DPR and OEHHA intend to convene roundtables with events this fall to additional consider these numerous methodologies and assumptions.
In early 2026, DPR and OEHHA intend to host a public workshop to share suggestions and data gathered from the roundtables and supply one other alternative for public enter.
Data gathered on the roundtables and workshop will assist inform further regulatory actions or mitigation that could be wanted to proceed to make sure that individuals are protected.
Decreases in 1,3-D Emissions Since Laws to Defend Residential Bystanders Went Into Impact
DPR is monitoring decreases in 1,3-D use over the past 5 years. Further restrictions on 1,3-D following laws efficient Jan. 1, 2024 to deal with most cancers and acute dangers to residential bystanders have proven a 29 % lower in emissions because of modifications in fumigation strategies required by the 2024 laws. The presently proposed laws so as to add protections for occupational bystanders are anticipated to construct on these decreases.
DPR and OEHHA Stay Dedicated to Figuring out Cheap Alternate options to Fumigant Pesticides
As a further motion on 1,3-D aligned with DPR’s work to foster sustainable pest administration, DPR commissioned an unbiased research carried out by the California Council of Science and Expertise on presently out there, viable and efficient alternate options to 1,3-D and different fumigants for managing pests in California. The research was launched in March 2025, and extra data will be discovered on DPR’s web site.
ABOUT THE DEPARTMENT OF PESTICIDE REGULATION
The California Division of Pesticide Regulation’s mission is to guard human well being and the setting. The division achieves this mission by fostering safer, sustainable pest administration and working a sturdy pesticide regulatory system. DPR’s work contains registering all pesticides bought or utilized in California, conducting pre- and post-registration scientific evaluations of pesticides to evaluate and mitigate potential hurt to human well being or the setting for pesticides within the air and water, and imposing pesticide use legal guidelines and laws in coordination with 55 County Agriculture Commissioners and their 500 area inspectors.
DPR additionally conducts outreach to make sure pesticide employees, farmworkers and native communities have entry to pesticide security data. Extra details about DPR will be discovered on our web site.
ABOUT THE OFFICE OF ENVIRONMENTAL HEALTH HAZARD ASSESSMENT
Our mission is to guard and improve the well being of Californians and our state’s setting by scientific evaluations that inform, help and information regulatory and different actions.
