The city of Detroit has shut off drinking water in all public schools after officials found high levels of lead and copper in samples from 16 out of 24 schools tested. Although there is no evidence that there are elevated levels of copper or lead in other schools, the Detroit Public School Community District superintendent decided to turn off all drinking water “until a deeper and broader analysis can be conducted to determine the long-term solutions for all schools,” he said in a statement. The district has more than 100 buildings and serves more than 40,000 students. The superintendent said he’s working with Detroit Mayor Mike Duggan (D) to address the issues. Testing of the water was ordered by the district, not the city or the state. The Great Lakes Water Authority provides water to the schools.