When the Obama administration laid out a 15-year plan to clean up the Chesapeake Bay, federal and state officials called it "one of the most comprehensive restorations in decades."
President-elect Donald Trump cannot unilaterally dismantle the far-reaching program. It is reinforced by federal law and has already survived a legal challenge.
But the real estate mogul campaigned on plans to drastically reduce federal regulations, and leave behind nothing but "tidbits" of the Environmental Protection Agency.
The transition could be shocking for conservationists but welcome for farmers and developers who complain of an excessive and expensive regulatory burden.
"Anything that's dependent on the EPA or federal funding I think we need to consider at least in jeopardy," said Josh Tulkin, director of the Sierra Club's Maryland chapter.
The so-called pollution diet the Obama administration laid out for the bay in 2010 established broad regulations on how much fertilizer can be spread on crops and lawns, how thoroughly wastewater-treatment plants must process sewage and what local governments must do to reduce runoff.
Such plans are laid out in the federal Clean Water Act, so as long as the Chesapeake is classified as "impaired," it would take an act of Congress to halt the cleanup effort.
"I don't think there's a lot of wiggle room that one person could come in and do away with it," said Valerie Connelly, executive director of the Maryland Farm Bureau.
The plan has drawn support from both Democrats and Republicans, so it's unclear that the Trump administration would target it, said Ann Swanson, executive director of the Chesapeake Bay Commission, a collaboration between Maryland, Pennsylvania and Virginia.
Still, Swanson said, she hopes Trump's rhetoric around a new approach to environmental policy was overstated "campaign talk."
Even if the cleanup plan remains, its enforcement depends on the strength of the EPA.
"It's always the product of a lot of leadership in how you implement a [cleanup plan] successfully, so the leadership at the U.S. EPA will deeply matter," Swanson said.
Others are looking forward to relaxed regulation under Trump. The farm bureau is eager to fight a new EPA rule expanding the types of waterways over which it has authority, for example, while also looking forward to Trump's promised renegotiation of trade agreements.
"I think farmers at least feel like they're going to have a seat at the table," Connelly said.