Subway riders at a newly renovated Upper West Side station are wading through crowds — and ponds — to catch the train.

The Cathedral Parkway station is plagued with pools of rainwater despite the MTA’s claim there’s “waterproofing throughout.”

The B and C train station at 110th Street and Central Park West was shut down five months ago for the $30 million renovation as part of Gov. Cuomo’s NYC Subway Action Plan.

But shortly after the newly polished stop was unveiled Sept. 4, straphangers noticed the pesky puddles — mostly throughout the 109th Street stairwell and in corners along the platforms — and vented their frustration on social media.

“The fact that you have to trudge through a few inches of water is ridiculous,” John Halpin, 39, told The Post after uploading a photo of the wet mess on Twitter. “The MTA can’t get anything right these days.”

The beleaguered agency admitted a “small set of tiles” were “incorrectly installed by a contractor” that’s causing the pooling, said spokesman Jon Weinstein.

He said “a permanent fix is being made this weekend.”