Big opioid haul near Central Pk.

FEDERAL agents took down a heroin and fentanyl mill running out of a nondescript Upper West Side apartment across from Central Park, authorities said Monday — marking the latest in a series of major busts across the city.

A joint NYPD-DEA “strike force” found nearly 20 pounds of fentanyl and heroin in a car and in a sixth-floor apartment on Central Park West by W. 105th St. on Friday and arrested four men, authorities said. The haul included 1,100 envelopes stamped “Uber.”

“Fentanyl is the deadliest street drug to ever hit this country,” said DEA Special Agent in Charge James Hunt.

On Wednesday, cops and federal agents busted an alleged Bronx heroin mill, and last week, the feds announced they caught a Colorado man with 40 pounds of fentanyl near a Bronx hotel.