WASHINGTON — For lunch on April 26, Scott Pruitt, the new administrator of the Environmental Protection Agency, dined with top executives from Southern Company, one of the nation’s largest coal-burning electric utilities, at Equinox, a white-tablecloth favorite of Washington power brokers.

That evening, it was on to BLT Prime, a steakhouse inside the Trump International Hotel in Washington, for a meal with the board of directors of Alliance Resource Partners, a coal-mining giant whose chief executive donated nearly $2 million to help elect President Trump.

Before those two agenda items, Mr. Pruitt met privately with top executives and lobbyists from General Motors to talk about their request to block an Obama administration move to curb emissions that contribute to climate change.

It was just a typical day for Mr. Pruitt, the former Oklahoma attorney general. Since taking office in February, Mr. Trump’s E.P.A. chief has held back-to-back meetings, briefing sessions and speaking engagements almost daily with top corporate executives and lobbyists from all the major economic sectors that he regulates — and almost no meetings with environmental groups or consumer or public health advocates, according to a 320-page accounting of his daily schedule from February through May, the most detailed look yet at what Mr. Pruitt has been up to since he took over the agency.