North Harford Middle School has posted a warning and sent a note home to parents this week that its water tested positive Monday for E. coli and fecal coliform bacteria contamination.
Black plastic bags were placed over school faucets, and children were encouraged to drink bottled water and clean their hands at hand-washing stations, said the school's PTSA treasurer, Lisa Breece.
It was not clear whether any children had become ill from the water. One of the school's vice principals referred questions to a county spokesman, who could not be reached last night.
The letter explaining the situation was posted a day after the potentially dangerous bacteria were found, and Breece said children were given a note to take home Wednesday. That led her to question school officials' handling of the situation.
"I don't think they're taking it as seriously as they should be," Breece said.