For the second time this month, an officer at an East Harlem stationhouse has come down with Legionnaires' disease, according to police.

Authorities said the officer at the 23rd Precinct on 102nd St. tested positive for the disease earlier this week but did not need to be hospitalized.

Another officer at the same station house tested positive for the illness about two weeks ago.

The city police department said recent tests for Legionella bacteria in the stationhouse's water supply came back negative.

But the NYPD is conducting additional inspections now as a safety measure.

Seven Legionnaires' disease cases were reported in Lenox Hill earlier this month.

One of the people diagnosed died, but city health department officials said that person was in their 90s and had additional health conditions that contributed to their death.

Symptoms of Legionnaires' disease are similar to the flu and include cough, fever, nausea, and stomach discomfort.

The bacteria are not usually contagious — although they can possibly spread in rare cases — and can be treated with antibiotics.

The bacteria that cause Legionnaires' disease are transmitted through the air.

Between 200 and 400 cases of the disease are reported in the city each year.

In 2015, there were multiple clusters of Legionnaires' disease in the Bronx. More than 100 people got sick and 12 died in the largest one, which was clustered in the South Bronx.