Hydrophobic organic contaminants in aquatic systems can pose risks to wildlife and human health due to their tendency to bioaccumulate, becoming toxic at higher concentrations. Monitoring these pollutants in water presents some difficulty due to their low solubility in water and typically very low (micrograms to picograms per liter) concentrations. Conventional grab sampling methods have poor time resolution, and usually require transporting several liters of water back to a laboratory for extraction and analysis. Passive sampling techniques extract the non-polar contaminant on site, but still require off-site analysis. Passive sampling also requires extended deployment in the field for sufficient compound partitioning to the organic layer. This time disconnect makes it difficult to pinpoint timing of contamination events such as spills or storm run off. The Stirring, High-speed, Actual-time Data Recorder and Quantifier (SHARQ) is a self-contained buoy designed for in situ extraction, detection and collection of hydrophobic compounds. The compound is extracted into a moving solvent stream in a hollow fiber membrane. The membrane is submerged in a flow-through chamber through which water moves continuously by means of a motorized stir bar. The chamber shields the extraction process from external water movement such as waves or current, creating a constant sampling rate. With this system, sampling rates are increased by a factor of 20 over passive sampling methods. The detection system is designed to provide a continuous signal from the solvent stream. Extracted fractions are collected in time-resolved intervals for later laboratory analysis if needed.