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Quality Control (QC)

Quality control samples are used to understand the performance of the method both in sample preparation and analyses.  Some examples of quality control samples include reagent blanks, reagent spikes, instrumental blanks, third party check samples, continuing calibration verification, surrogate standards, limit of quantitation  samples, and certified reference materials.

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Hydrologist conducting a sedimentation survey at Lago La Plata, Puerto Rico

Water-Quality for Florida

The U.S. Geological Survey provides scientific and technical expertise, leadership, and coordination in addressing issues concerning the quality of the Nation's water resources. Our scientists: Collect, analyze, and interpret water-quality data, Engage in field and laboratory research and methods development, Work with local, State, and Federal agencies and the citizenry to identify and understand...
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Water Resources Mission Area, National Water Quality Program, Water Resources Research Act Program, Caribbean-Florida Water Science Center (CFWSC), National Water Quality Laboratory
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Water-Quality for Florida

The U.S. Geological Survey provides scientific and technical expertise, leadership, and coordination in addressing issues concerning the quality of the Nation's water resources. Our scientists: Collect, analyze, and interpret water-quality data, Engage in field and laboratory research and methods development, Work with local, State, and Federal agencies and the citizenry to identify and understand...
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