The 13abc I-Team has uncovered a letter from the Ohio EPA showing concerns about the city's water system dated in June.
The letter warns the city about the lack of progress being made to improvements at Toledo's Public Water System, in particular the Collins Park Water Treatment Plant.
It goes on to say the plant is vulnerable to potential failures that could severely impact the city's ability to provide enough safe water to its citizens.
"I cannot underscore boldly enough the precarious condition of Toledo's drinking water system and the imminent vulnerability to failure," wrote Ohio EPA Director Craig Butler.
The City of Toledo responded to the letter a little over a week later on June 16.