An air-conditioning tower at a Queens police precinct tested positive for a trace amount of bacteria that causes the potentially deadly Legionnaires’ disease, city health officials said Tuesday.

Testing at the 112th Precinct station house along a busy Forest Hills street found a low exposure level of Legionella bacteria in the tower, prompting it to be drained and disinfected, officials and law-enforcement sources said.

The small amount of bacteria was considered “Level 2,” low enough that it is not likely to cause any danger and doesn’t require notification of occupants under state law, sources said.

The 112th Precinct covers Forest Hills and Rego Park. Google Maps

But NYPD officials still notified cops in the precinct out of an abundance of caution — and union leaders with the Sergeants Benevolent Association warned their members to seek immediate medical attention if they developed symptoms, according to a memo obtained by The Post.

“At this time, no patients with confirmed Legionnaires’ disease have reported working at the 112th Precinct and there are no concerns for the public health or the NYPD’s workforce related to the cooling tower at this location,” a city Health Department rep said.

“There is no risk to public health or the workforce there and no one has gotten sick. It is also safe to drink the water and shower there.”

The low-positive test and subsequent warning came as a recent Legionnaires’ disease outbreak on the Upper East Side that killed 11 people has wound down.

The Manhattan outbreak led to a torrent of criticism for Mayor Zohran Mamdani and health officials, whose critics accused of failing to act quickly enough to both detect the insidious microbes and thwart the outbreak.

Building owners are required under city law to test cooling towers where the bacteria can fester and thrive during hot summer weather every 31 days.

Health officials were criticized over their response to a Legionnaires’ disease outbreak this summer in Manhattan. Luiz C. Ribeiro for New York Post

The Queens precinct — which serves Forest Hills and Rego Park — on Austin Street had its air-conditioning tower test results come in Sept. 2, yielding a low positive, sources said.

A separate precinct tower for drinking and shower water tested negative for the insidious microbes, the sources said.

The affected tower was cleaned last week, officials said.

“NYPD will collect another sample to validate that their action was effective,” the health department spokesperson said. “These actions follow our regulations and is a textbook example of how they are designed to proactively monitor and identify the presence of bacteria growing inside cooling towers and mitigate it before it becomes a risk.”

— Additional reporting by Craig McCarthy