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State of California Department of Pesticide Regulation
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Reports - Groundwater Archive

Sampling for Pesticide Residues in California Well Water 2022 Update

August 1, 2023

2025 Pesticide Drinking Water Standards and Information

July 1, 2025

The Qualification of Method EMON-SM-05-061 as Unequivocal According to the Pesticide Contamination Prevention Act

July 28, 2025

The Qualification of Method EMON-SM-05-062 REVISION 7 as Unequivocal According to the Pesticide Contamination Prevention Act

July 22, 2025

The Qualification of Method EMON-SM-05-032 REVISION 5 (Draft) as Unequivocal According to the Pesticide Contamination Prevention Act – Interim Memorandum

July 28, 2025

The Qualification of Method EMON-SM-05-060 (Draft) as Unequivocal According to the Pesticide Contamination Prevention Act – Interim Memorandum

July 28, 2025

Study 228: Monitoring Groundwater Concentrations of Pesticides in Sensitive Areas with High Agricultural Use (Well Network Sampling) Annual Update 2022

March 1, 2025

Standard Operating Procedure – Calculating Pesticide Concentration in Dry and Wet Soil

April 11, 2008

Study 325: Analysis of Neonicotinoid and Fungicide Concentrations in Soil Cores from Treated Lettuce Fields

March 1, 2025

Protocol for Monitoring the Concentration of Detected Pesticides in Wells Located in Highly Sensitive Areas

January 1, 1999

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