Flint's Water Crisis (TEDEd)Version en ligne The science behind the Flint water crisis. par Amanda Peralta 1 Water was originally sourced from ________ but was switched to ___________. Written answer 2 Why were lead pipes used for water in the past? Written answer 3 Lead pipes are still used around the country by millions of people. Why are they usually safe? Written answer 4 High chloride levels also caused lead to leak into the water because it breaks down the protective barrier. Where does sodium chloride come from? Written answer 5 There were also bacterial problems in the Flint River. Chlorine was added because it is used as a disinfectant. Why did the chlorine not work to kill the bacteria? Written answer 6 The extra chlorine added to kill bacteria created trihalomethanes. What are trihalomethanes linked to? Written answer 7 Can you see, smell, or taste lead in water? Written answer 8 The EPA allows 15ppb (parts per billion) of lead in water without it being hazardous. How much did some homes have? Written answer
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