![Flint Water FILE - In this Jan. 26, 2016 file photo, registered nurse Brian Jones draws a blood sample from a student at Eisenhower Elementary School in Flint, Mich. The students were being tested for lead after the metal was found in the city's drinking water. Blood-lead levels in Flint children under the age of 6 were significantly higher after the city switched its water in 2014 in a cost-saving move, according to report released Friday, June 24, 2016, by U.S. disease experts. (AP Photo/Carlos Osorio, File)](https://api.time.com/wp-content/uploads/2016/06/child-lead-flint-water.jpg?quality=85&w=2400)
Children under the age of six in Flint, Michigan, were significantly more likely to have elevated levels of lead in their blood following the city’s 2014 switch in water providers, the Centers for Disease Control and Prevention (CDC) said in a report.
The findings—pulled from an analysis of more than 9,000 blood lead tests conducted over three years—help quantify the scale of a public health crisis in the Michigan city. Children under six were about 50% more likely to have elevated levels of lead in their blood after the city began to source its water from the Flint River. Health authorities do not consider any level of lead in the blood to be safe, but levels higher than 5 micrograms of lead per deciliter of blood raises particularly strong alarm.
Blood lead levels have declined since the city switched its water source back to the Detroit Water System following public outcry over the situation. The CDC still recommends children under six in the city have their blood tested for high levels of lead.
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Write to Justin Worland at justin.worland@time.com