The Office of Pesticide Programs evaluates the potential for pesticides to occur in aquatic environments using screening level fate and transport models and an assessment of available monitoring data. A major limiting factor in the use and interpretation of pesticide surface water monitoring data is infrequent sampling. The SEAsonalWAVEQ with EXtended capabilities (SEAWAVE-QEX) model was developed by the U.S. Geological Survey to impute missing or censored pesticide concentrations from surface water monitoring data using daily streamflow as a covariate. SEAWAVE-QEX was evaluated by masking daily or near-daily pesticide monitoring data to mimic potential monitoring program sampling designs. The results of SEAWAVE-QEX are compared to daily or near-daily pesticide monitoring data in order to evaluate the utility of the tool for use in pesticide exposure assessments.<br/>

Evaluation of SEAWAVE-QEX as a tool to increase the utility of available pesticide surface water monitoring data

256th National Meeting (2018)

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