An aide to scandal-scarred EPA chief Scott Pruitt told House investigators that she ran personal tasks for the big-spending cabinet member — including trying to snare him a used mattress from President Trump’s DC hotel.

Pruitt scheduler Millan Hupp’s revelation was included in testimony released by Democrats on the House oversight committee Monday.

It was unclear what the former Oklahoma pol — already under fire for frittering away taxpayers’ dollars on first-class travel, round-the-clock security and a sitcom-like, $43,000 “Cone of Silence” private phone booth for his office — had planned for the presumably soiled mattress.

But in a letter to GOP committee Chair Trey Gowdy, Democrats said Hupp carried out a multitude of personal errands for Pruitt.

They included helping him land a below market rate rented room in a lobbyist’s condo, booking him a Rose Bowl trip so he and his family could see the Oklahoma Sooners play, and the discussions about getting the “Trump Home Luxury Plush Euro Pillow Top” mattress.

Rep. Elijah Cummings, the committee’s ranking Democrat, called the errands a violation of federal law on gifts from subordinates.

“If Ms. Hupp’s statements to the Committee are accurate, Administrator Pruitt crossed a very clear line and must be held accountable,” he and Rep. Gerry Connolly (D-Va.) wrote.

“Federal ethics laws prohibit Administrator Pruitt from using his official position for personal gain and from requesting and accepting services from a subordinate employee that are not part of that employee’s official duties.”

It was revealed just last week that Pruitt forked over more than $1,500 for a dozen commemorative pens bearing his signature and a set of journals that cost more than $1,600.

His office also gave big raises to two of his Oklahoma cronies he brought with him to Washington — raises which Pruitt told investigators he knew nothing about.

The embattled EPA head remains a Trump favorite despite the ethical clouds gathering around his time in office because he has aggressively reversed environmental controls enacted by President Barack Obama, and made decisions favored by fossil fuel and mining interests, deep-pocketed supporters of the president.

In April, the president tweeted that Pruitt “is doing a great job but is TOTALLY under siege” by the media.

Asked about the matter Monday, EPA spokesman Jahan Wilcox told the Washington Post in an email, “We are working diligently with Chairman Gowdy and are in full cooperation in providing the Committee with the necessary documents, travel vouchers, receipts and witnesses to his inquiries.”

With Associated Press