Reevaluation Program

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Food and Agricultural Code section 12824 requires the Department of Pesticide Regulation (DPR) to continuously evaluate pesticides currently registered in California. One of the ways DPR satisfies this mandate is through reevaluation. California Code of Regulations, Title 3, Section 6220, et seq. describes the reevaluation process. DPR conducts pesticide reevaluations where, after investigating reported episodes or other information, the department determines that "a significant adverse impact has occurred or is likely to occur." In some cases, a risk assessment may be conducted as a part of a reevaluation. During the reevaluation, the department may determine that additional restrictions on use of the pesticide are necessary. Mitigation may require the development and adoption of regulations through the rulemaking process, label changes, or other control measures including cancellation. If additional mitigation is needed, DPR is subject to applicable timelines established in AB 2113 or as otherwise provided by law.

AB 2113 (Chapter 60, Statutes of 2024) established the requirement that DPR post on its internet website an estimated completion time for the pesticides that the department has under reevaluation as of January 1, 2024. In accordance with that requirement, DPR is publishing the estimated completion times for all current reevaluations (see "Active Reevaluations" table below). Individual reevaluations with statutorily imposed timelines are also noted below. Scientific assessment is necessary to determine if there are pesticide use scenarios that require mitigation. Under AB 2113, DPR will provide annual updates on its progress, allowing for better resolution on specific timelines.

  • Active Reevaluations
    The table below details, for each active ingredient currently under reevaluation, the planned stages of the reevaluation with estimated completion dates. More detail for each reevaluation can be found through the relevant hyperlinks.
    Reevaluation Stages with estimated completion dates (quarter [Q] and year)
    Chloropicrin
    • Chloropicrin Manufacturer’s Task Force (CMTF) to complete study 4 and preliminary report by Q3 2025.
    • CMTF to complete studies 1, 2, and 3 by Q4 2025.
    • Determine need for CMTF Study 5 by Q4 2025.
    • Complete of review of all required CMTF studies by Q2 2027.
    • If mitigation or rulemaking is required, complete by Q2 2029.
    Cyfluthrin
    • Publish Human health risk assessment scope by Q2 2025.
    • Complete risk human health risk assessment by Q4 2026.
    • If mitigation or rulemaking is required, complete by Q4 2028.
    Diphacinone
    • Conduct informal public workshops on proposed mitigation by Q3 2025.
    • Complete scientific evaluation and determination of need for mitigation by Q4 2026.
    • If mitigation or rulemaking is necessary, complete by Q3 2028.
    Non-Agricultural Outdoor Neonicotinoids 1
    • Completed draft human health risk assessment for imidacloprid Q1 2024.
    • Complete final imidacloprid human health risk assessment by Q1 2025.
    • Complete draft human health risk assessments for acetamiprid, clothianidin, dinotefuran, and thiamethoxam by Q1 2025.
    • Complete evaluation of impact of neonicotinoid pesticides on aquatic organisms by Q3 2025.
    • Complete final human health risk assessments for acetamiprid, clothianidin, dinotefuran, and thiamethoxam by Q1 2026.
    • Issue reevaluation determination of neonicotinoid pesticides' impacts to pollinating insects, aquatic organisms, and human health by Q3 2027.
    • If mitigation or rulemaking is necessary, complete by Q3 2029.
    Paraquat Dichloride 2
    • Publish preliminary scientific reports and open 45-day public comment period by Q4 2024.
    • Review public comments and issue planned next steps by Q2 2025.
    • If mitigation or rulemaking is required, complete by Q1 2029.
    Second-Generation Anticoagulant Rodenticides (SGARs)
    • Conduct informal public workshops on proposed mitigation by Q3 2025.
    • Complete scientific evaluation and determination of need for mitigation by Q4 2026.
    • If mitigation or rulemaking is necessary, complete by Q3 2028.
    1Timelines in FAC section 12838 (neonicotinoids).
    2FAC section 14086 (paraquat).
  • Proposed Reevaluations - None
  • Completed Reevaluations
    • Chlorpyrifos
    • Copper Antifoulant Paints
    • Neonicotinoids
    • Pyrethroids
    • Sulfuryl Fluoride
    • VOC Reformulation of certain liquid pesticide products to reduce volatile emissions
  • Continuous Evaluation and Reevaluation, PDF
  • Reevaluation Regulations

Semiannual Reports Summarizing the Reevaluation Status of Pesticide Product

DPR produces a semiannual report summarizing the status of pesticides under reevaluation and any preliminary investigation for which factual or scientific information was received but no reevaluation was initiated.

For document retrieval, please submit a request at our Public Records Portal (NextRequest)


For content questions, contact:
Ann Prichard
1001 I Street, P. O. Box 4015
Sacramento, CA 95812-4015
Phone: (916) 445-1560
E-mail: Ann.Prichard@cdpr.ca.gov