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State of California Department of Pesticide Regulation
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Reports Archive

Study 228: Monitoring Groundwater Concentrations of Pesticides in Sensitive Areas with High Agricultural Use (Well Network Sampling) Annual Update 2023

December 1, 2025

Study 321: Surface Water Monitoring for Pesticides in Agricultural Areas in the Central Coast and Southern California, 2024

January 1, 2026

Draft Annual Report on Volatile Organic Compound Emissions from Pesticides: Emissions for 1990-2024

January 16, 2026

Sampling for Pesticide Residues in California Well Water 2025 Update

December 1, 2025

Monitoring Pesticides in Wastewater Influent and Effluent

January 6, 2026

Study 310: Surface Water Monitoring for Pesticides in Agricultural Areas of Northern California, 2024

January 7, 2026

Study 321: Surface Water Monitoring for Pesticides in Agricultural Areas in the Central Coast and Southern California in 2026 and 2027

January 8, 2026

Status of Department of Pesticide Regulation Actions to Continuously Evaluate Pesticides and Mitigate Risks (as of June 30, 2025)

June 30, 2025

Standard Operating Procedure – Water TOC Analysis Using the Elementar TOC Vario Cube

December 15, 2025

2024 Status Report Pesticide Contamination Prevention Act

January 1, 2024

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