DPR obtains groundwater sampling data from other public agencies and through its own sampling program. DPR attempts to confirm detections reported by other agencies through follow-up sampling. These data are reported annually along with the actions taken by DPR and the State Water Resources Control Board to protect groundwater from contamination by agricultural pesticides.
DPR samples groundwater to determine (1) whether pesticides with the potential to pollute groundwater are present in groundwater, (2) the extent and source of pesticide contamination, and (3) the effectiveness of regulatory mitigation measures.
The following fact sheets contain information about pesticides or degradates that the Groundwater Protection Program actively samples for or has sampled for in the past. Not all information is available for all pesticides.
- Pesticide Information and Use Fact Sheet, July 2021, PDF
- Pesticide Drinking Water Standards Fact Sheet, July 2021, PDF
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