Former Gov. Andrew Cuomo may no longer be in public office, but on Sundays, he can sometimes be found in predominantly Black churches talking about politics.

This weekend at the First Baptist Church of Crown Heights in Brooklyn, he addressed possible water contamination at the Riis Houses, a New York City Housing Authority development in the East Village.

Nearly two years ago, NYCHA officials said they found arsenic in the water, then declared it a false alarm.

But recently, residents have become sick. One was hospitalized with suspected arsenic poisoning, which prompted Mayor Eric Adams to drink the water himself to show it’s safe.

“They still haven’t answered the question: ‘How did the arsenic get in the blood of the residents?’” Cuomo told churchgoers. “Two years of government incompetence.”

Cuomo did not call out Adams by name, but on Monday, the mayor responded.

“The former governor is well aware of the problems we’ve had in NYCHA and how this administration has specifically focused on turning around NYCHA,” he said in an interview on PIX11.

A NYCHA spokeswoman was more forceful in punching back.

In a scathing statement on Sunday, Barbara Brancaccio called Cuomo’s remarks irresponsible.

“Andrew Cuomo’s statements are those of desperate fallen leader, who is purporting false public health information and fear mongering for political expediency — something the ex-governor reminded New Yorkers of again and again during COVID,” she wrote in a statement.

Cuomo is rumored to be considering a run for mayor next year. There are already two other Democrats, state Sen. Zellnor Myrie and former City Comptroller Scott Stringer, who have expressed interest.

Adams and Cuomo have been friendly, and appeal to the same moderate base. But on Sunday, Cuomo, a former federal housing secretary under President Bill Clinton, framed the arsenic episode as an injustice.

“The truth is, if that happened in a rich neighborhood, if that happened on Park Avenue, you would have heard about that in the news every day,” he said.

Adams was asked at an unrelated event Monday if he thinks Cuomo is running for mayor.

“Not concerned with that,” he said. “I’m concerned with governing an amazing city. And you don’t spend 35 years climbing to the top of the mountain and worry about the view. You enjoy the view. Right now, I’m on the top of the mountain. I’m the mayor of the greatest city on the globe.”