Southern Crop

Southern Crop

Notice of Decision Pertaining to Metolachlor/S-Metolachlor Degradate Detections in Ground Water

Update – Degradates of Metolachlor/S-Metolachlor (preemergent herbicides for weed control) in the Ground Water of the State of California have “… not polluted and do not threaten to pollute the ground water of the state …” according to a determination made by the California Department of Pesticide Regulation (DPR) which finds that “… continued monitoring of metolachlor/S-metolachlor products and their degradation products ethanesulfonic acid and oxanilic acid levels in ground water an appropriate approach to protect against pollution of the ground waters of the state and will take immediate additional action if there is sufficient evidence of approaching the health-protective drinking water level, factoring in an adequate margin of safety …”

Document Title: * The title of the July 27, 2017 California Department of Pesticide Regulation (DPR) Notice is “Notice of Decision Pertaining to Metolachlor/S-Metolachlor Degradate Detections in Ground Water”
* The title of the May 31, 2017 California EPA OEHHA Notice is “Public Health Concentrations for Metolachlor and Metolachlor Degradates Ethanesulfonic Acid and Oxanilic Acid in Groundwater”
* The title of the April 24, 2017 California Department of Pesticide Regulation (DPR) Notice is “Notice of Public Meeting Pertaining to Metolachlor/S-Metolachlor Detections in Ground Water”
* The title of the February 8, 2017 California Department of Pesticide Regulation (DPR) Notice is “Notice of Hearing Pertaining to Metolachlor and S-Metolachlor Degradation Product Residue Detections in Ground Water”
* The title of the September 28, 2016 California Department of Pesticide Regulation (DPR) Notice is “Notice of Metolachlor/S-Metolachlor Degradation Product Residue Detections in California Ground Water and Registrant Opportunity to Request Hearing”

Organization: * California Department of Pesticide Regulation (DPR)
* California EPA Office of Environmental Health Hazard Assessment (OEHHA)

Source: * July 27, 2017, April 24, 2017, February 8, 2017 and September 28, 2016 California Department of Pesticide Regulation (DPR) Notices
* May 31, 2017 California EPA OEHHA Notice

Web site: The July 27, 2017 California DPR Notice is posted at
http://cdpr.ca.gov/docs/registration/canot/2017/ca2017-11.pdf

The DPR Director’s decision and subcommittee’s finding and recommendations are available at
http://www.cdpr.ca.gov/docs/emon/grndwtr/metolachlor.htm

The May 31, 2017 California EPA OEHHA Notice is posted at
http://oehha.ca.gov/pesticides/report/public-health-concentrations-metolachlor-and-metolachlor-degradates-ethanesulfonic

The May 2017 OEHHA publication, titled “Public Health Concentrations for Metolachlor and Metolachlor Degradates Ethanesulfonic Acid and Oxanilic Acid in Groundwater”, is posted at
http://oehha.ca.gov/media/downloads/pesticides/report/metolachlor05312017.pdf

The April 24, 2017 California DPR Notice is posted at
http://www.cdpr.ca.gov/docs/registration/canot/2017/ca2017-07.pdf

The February 8, 2017 California DPR Notice is posted at
http://cdpr.ca.gov/docs/registration/canot/2017/ca2017-03.pdf

The September 28, 2016 California DPR Notice is posted at
http://www.cdpr.ca.gov/docs/registration/canot/2016/ca2016-06.pdf

Information on California DPR is available at
http://www.cdpr.ca.gov/dprabout.htm

The previous FIEN message related to this topic is posted at
http://www.fien.com/articleDisplay.php?id=40410

Contact: Questions may be directed to Dr. Tulio Macedo who is Senior Environmental Scientist (Supervisory) with the Pesticide Registration Branch of the California Department of Pesticide Regulation in Sacramento, California at 916 324 3527; e-mail: Tulio.Macedo@CDPR.Ca.gov

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