A road construction project near Dayton, Ohio-based Miami Valley Hospital caused high levels of lead in the hospital's water supply earlier this year, according to a Dayton Daily News report.
In June, the Environmental Protection Agency found elevated levels of lead in the hospital's water supply, as well as in the water supplies of the Berry Women's Center and the Fred E. Weber Center for Health Education.
A recently closed investigation concluded a road construction project near the hospital stirred up sediment that entered the water supply and contaminated it.
The high levels of lead — samples tested showed up to 220 parts per billion of lead levels, when federal guidelines call for under 15 parts per billion — were only discovered because the hospital is required to test for lead every six months.
No patients who were tested had elevated lead levels in their blood, according to the report.