The California Department of Pesticide Regulation has released its annual Air Monitoring Report, which found that no air samples taken at monitoring sites in 2023 detected pesticides at or above health-protective screening levels or regulatory targets. DPR operates four monitoring stations in areas with high pesticide use: Oxnard, Santa Maria, Shafter and Watsonville. The stations collect weekly air samples, which are tested for 40 pesticides.  The 2023 data found that 95% of all samples collected had no detectable pesticides. Twenty-one pesticides were not detected at all, and 11 were detected at very low, trace levels which indicates unlikely risk to or impact on people’s health.  Seven pesticides were detected at quantifiable levels, with detections falling below health-protective screening levels or regulatory targets. Those pesticides were 1,3-dichloropropene, captan, dichlorvos (DDVP), methyl isothiocyanate (MITC), malathion, methyl bromide and pendimethalin.  DPR measures air against screening levels and regulatory targets. Regulatory targets are screening levels associated with a regulatory requirement to mitigate pesticide risks or impacts. A pesticide detection below a specific screening level or regulatory target indicates that adverse health effects are unlikely, including short-term (acute) pesticide impacts, such as eye or throat irritation, nausea, headaches or blurred vision, or long-term (chronic) pesticide risks such as birth defects or nervous system problems. DPR also measures for exposures that could increase the lifetime risk for cancer.  “Monitoring the air in communities with high pesticide use is critical to keeping California safe for everyone,” said DPR Director Julie Henderson. “I am encouraged to see that all of the 2023 pesticide concentrations fall below our health screening levels.