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State of California Department of Pesticide Regulation
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Reports - Groundwater Archive

Study 228: Monitoring the Concentrations of Detected Pesticides in Wells Located in Highly Sensitive Areas (Well Network Sampling) Annual Update 2018

January 1, 2018

Study 228: Monitoring the Concentrations of Detected Pesticides in Wells Located in Highly Sensitive Areas (Well Network Sampling) Annual Update 2021

December 1, 2022

Study 228: Monitoring the Concentrations of Detected Pesticides in Wells Located in Highly Sensitive Areas (Well Network Sampling) Annual Update 2020

Detection of Atrazine, Simazine, and Their Breakdown Products in Public Water Supply Wells

Demonstration of Effectiveness of Chemigation of Pre-Emergence Herbicides Applied through Low-Volume Irrigation Systems

February 1, 2005

Sampling for Pesticide Residues in California Well Water DPR Response to Detections in the 2021 Well Sampling Report

Sampling for Pesticide Residues in California Well Water 2024 Update

May 28, 2025

Sampling for Pesticide Residues in California Well Water 2021 Update

April 1, 2022

Sampling for Pesticide Residues in California Well Water 2020 Update

April 1, 2021

Sampling for Pesticide Residues in California Well Water 2019 Update

February 1, 2020

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