Students at Bridgewater State University are worried about a possible mold problem on campus, according to a story from NBC Boston.

Mold was discovered at the school’s Maxwell Library in early October, according to the TV station.

Thousands of books were inspected and about 50 books had to be thrown away as a result, according to NBC.

While school officials say the library has been cleaned up, a few students told NBC that they still found it hard to breathe.

“It just makes your breathing really hard, almost like you’re getting something stuck in your throat,” junior Alexis Ostman, who has asthma, told the station.

According to the university, mold tests and air samples show there were never unsafe levels of mold in the building. A school official told the TV station that they took action to clean up the issue.

“How do you get rid of it? Either you remove it or you clean it so we took those steps,” said Mark Carmody, the assistant vice president of operations for Bridgewater State University told NBC.

Carmody blamed pandemic precautions — like opening windows for air circulation — and a hot, humid summer for the mold issue, according to the station.

According to NBC, a number of students and staff spoke at a virtual meeting Monday about the problem and questioned if it extends to other buildings on campus.

“In my classrooms, you can look up, and it’s literally streaks of what I assume to be mold,” sophomore Megan Keller told the station.

“People are complaining the residence halls have mold now, and they’ve done absolutely nothing about it,” Ostman told NBC.

University officials say they are responding to concerns and stress all campus buildings are safe, according to the TV station.

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