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Regulatory Issues

Back to Surface Water Protection Program

New regulations and reevaluation notices to registrants to mitigate surface water contamination from pesticide use.

Surface Water Regulatory Process

• Management Agency Agreement (MAA) with State Water Resources Control Board (1997) (PDF, 409 kb)
• Pesticide Management Plan for Water Quality – MAA implementation plan (1997) (PDF, 3.48 mb)
• Process for Responding to the Presence of Pesticides in Surface Water (2003) (PDF, 71 kb)

Surface Water Regulations

• Invitation to interested parties to discuss draft concepts for regulations to prevent pesticide contamination of surface water (February 2009 letter) (PDF, 42 kb)
• Procedure for identifying pesticides with a high potential to contaminate surface water (PDF, 78 kb) (May 2009 memorandum)
• Update (November 2009) (PDF, 14 kb) - Prepared for a series of workshops held on these proposals in early 2010.
• Draft restrictions to address pesticide drift and runoff to protect surface water (PDF, 63 kb) (Revised February 2010)
• Flow charts - draft surface water regulation concepts (PDF, 71 kb) (Revised February 2010)
• Comments received by DPR and DPR responses (PDF, 161 kb) (February 2010)
• Responses to second set of comments received by DPR (PDF, 38 kb) (March 2010)

Comments on these proposals may be submitted to Mark Pepple, mpepple@cdpr.ca.gov.

Antifouling Paint

• Memorandum (PDF, 35 kb) from DPR Director Mary-Ann Warmerdam to Tam Doduc, Chair, State Water Resources Control Board (December 2007)
• Reevaluation of antifouling paint pesticides

Pyrethroid Reevaluation

• PWG and Meta Research. 2010. California 2009 Urban Pesticide Use Pattern Study (PDF 1.3mb)
• DPR Pyrethroid Forum (April 30, 2007)- Agenda and presentations
  • Agenda (PDF, 25 kb)
  • Urban Consumer Use Patterns: Off-Site Movement Potential; Mitigation/Optimization Martinez R. (PDF, 524 kb)
  • Protecting Water Quality: The Federal and State Clean Water Mandates to Prevent Toxicity and the California Water Boards’ Role Mumley, T. and Karkoski, J., (PDF, 725 kb)
  • Pesticides Pose Compliance Challenges for Urban Runoff Permittees Brossea, G., (PDF, 388 kb)
  • Stormwater Flow Chart (PDF, 18 kb)
  • Pyrethroid Problem Formulation Overview Poletika, N. (PDF, 178 kb)
  • Pyrethroids Residential and Consumer Products Use in California Assaf, N. (PDF, 237 kb)
  • POTWs and the Regulatory World: Pesticides Bobel, P., Moran, K. and Weir, C. (PDF, 1.2 mb)
  • Wastewater Flow Chart (PDF, 19 kb)
  • Environmental Fate and Aquatic Toxicity of the Synthetic Pyrethroids Dobbs, M., Warinton, J., Giddings, J.M., Hendley, P. and Lam, C. (PDF, 338 kb)
  • Registration and Re- evaluation of Pyrethroids, Pyrethrins, and Synergist (PPS) Chemicals (U.S. EPA) Pyrethroids, Pyrethrins, and Synergist (PPS) Chemicals Guerry, J. (PDF, 72 kb)
  • Urban and Agriculture Prioritization for DPR's Reevaluation of Pyrethroids Jones, R., Markle, J., Hendley, P., Poletika, N., Assaf, N., Mitchell, G., Dobbs, M. and Kohne, S. (PDF, 453 kb)
  • Overview of Stormwater- Related Scientific Issues and Resources Moran, K. (PDF, 934 kb)
  • PCOC: CA Industry Perspective Van Steenwyk, D. (PDF, 55 kb)
• Documents associated with pyrethroid reevaluation

Dormant Spray Insecticides Regulation

• DPR Text of Final Regulations pertaining to the use of dormant spray insecticides and mitigation of surface water contamination (PDF, 24 kb)
• Background Information on development of the regulatory package (PDF, 11 kb)

Chlorpyrifos Reevaluation

• California Notice 2004-4. Notice of Decision to Begin Reevaluation of Pesticide Products Containing Chlorpyrifos. April 23, 2004 (PDF, 128 kb)

Diazinon Reevaluation

• California Notice 2003-2. Notice of Decision to Begin Reevaluation of Pesticide Products Containing Diazinon. March 24, 2003. (PDF, 146 kb)
• Guidance for Diazinon Reevaluation Studies (PDF, 314 kb)