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In November 2000 the Washington Aqueduct, which is the water treatmentprovider to the District of Columbia, switched its disinfectant from chlorine tochloramines in order to reduce disinfection byproducts (DBP). However, accompanying this change was an increase in 90thpercentile lead levels from 12 parts per billion (ppb) to 70 ppb. Lead profiles conducted by District of Columbia Water 15 ppbin a few weeks time frame, (Schock

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Edition: Vol. - No. Published: 11/01/2005 Number of Pages: 14 File Size: 1 file , 330 KB