Data Series 550
The U.S. Geological Survey, in cooperation with the Miami-Dade Water and Sewer Department, conducted a reconnaissance study in 2008 to determine the occurrence of 228 organic compounds in raw, source (untreated) and finished (treated) drinking water at seven municipal water-treatment facilities in Miami-Dade County. Results of this sampling study showed that 25 (about 11 percent) of the 228 organic compounds were detected in at least one source water sample and 22 (about 10 percent) were detected in at least one finished water sample. The concentrations of organic compounds in source water samples were less than or equal to 0.2 µg/L (micrograms per liter). The concentrations of organic compounds in finished water samples were generally less than or equal to 0.5 µg/L, with the exception of bromoform (a possible disinfection byproduct) at estimated concentrations ranging from 0.7 to 2.8 µg/L and diethyl phthalate (a plasticizer compound) at 2 µg/L.
First posted December 15, 2010
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Foster, A.L., and Katz, B.G., 2010, Occurrence of organic compounds in source and finished samples from seven drinking-water treatment facilities in Miami-Dade County, Florida, 2008: U.S. Geological Survey Data Series 550, 22 p.
Purpose and Scope
Study Area and Site Selection
Sample Collection and Analyses
Quality Assurance and Quality Control
Organic Compounds in Water Samples
Organic Compounds in Source (Untreated) Water
Organic Compounds in Finished (Treated) Water