Confronted with The Post’s damning front-page expose that showed city officials left children in lead-tainted apartments, Mayor Bill de Blasio on Monday promised assistance and additional inspections to help fix what he called a “never-again situation.”

“We will not allow any contested — any contesting of Health Department results. We want immediate follow-up in the case of all families,” de Blasio said. “If we find something, immediate action taken on the apartment, and the best technology to determine what the real situation is.”

“To me, it’s a never-again situation,” the mayor added.

His remarks came in response to questions about The Post report that Health Department inspectors found conclusive proof of lead paint in 34 NYCHA apartments that were home to poisoned children, but officials failed to force NYCHA to fix the lead hazards found in 33 of them.

The finding, based on nearly 4,500 pages of internal Health Department records obtained through a Freedom of Information request, was the latest damning revelation in the lead exposure crisis that has rocked the Housing Authority to its core, leaving it under the partial control of a federal monitor and forcing City Hall to mount an $88 million lead testing blitz to find lead tainted paint.

Reacting to reporter questions, de Blasio promised the city would finally reach out to the families living in the three dozen apartments where NYCHA squirreled out of making repairs.

“I want the Health Department to go back to each and every one of them, evaluate their situation with their children and see if they need any help at all,” Hizzoner said at an unrelated press conference. “If they need it, we’ll provide it.”

He also said the apartments would be reexamined as part of a massive multimillion-dollar effort to check 135,000 of NYCHA’s 174,000 apartments for lead.

“We are going to go back,” he said, “to review the findings with better technology and come to a final decision about the status of that apartment.”

The 34 instances where findings were contested have put NYCHA’s recently abandoned years-long policy to challenge every single Health Department order squarely back in the spotlight.

All told, NYCHA challenged 183 of the 191 positive lead inspections carried out by the Health Department between 2010-2017, city data shows.

The Post examined 97 of those inspections and found NYCHA challenged 88.

It abandoned that policy of contesting every finding under intense pressure after Manhattan federal prosecutors blasted it in their bombshell lawsuit, which alleged the authority lied about lead inspections and crumbling conditions to regulators in Washington, DC, for years.

“We will not allow any contesting of Health Department results, we want immediate follow-up in the case of all families,” de Blasio said Monday.

However, de Blasio aides clarified late Monday that Hizzoner only meant to claim that NYCHA is now making all repairs.

The authority still contests some cases, but specifics were not immediately available

“The health of NYCHA residents is of critical importance to the mayor, which is why last year he directed NYCHA to always abate when the Health Department finds evidence of lead – no questions asked,” said spokeswoman Marcy Miranda.