The Chesapeake Bay earned a C+ (56%) health score from University of Maryland researchers on Tuesday — the highest mark in the 40-year history of the tracking program, yet still far from clean-water thresholds that states missed by the 2025 deadline.

The score, issued by the university's Center for Environmental Science, rests on seven indicators: dissolved oxygen, chlorophyll, benthic community, aquatic grasses, phosphorus, nitrogen and water clarity. Dissolved oxygen scored an A (85%) and total phosphorus an A- (83%). Water clarity lagged at a D (25%) and chlorophyll at a D+ (39%).

What do the load numbers show?

An EPA assessment published in August estimated nitrogen loads fell nearly 15% between 2009 and 2025 — roughly 15% of the interim nitrogen target. Phosphorus loads dropped 21.4%, reaching 90% of the interim target, and sediment loads fell 7%, fully meeting that interim goal. These are modeled estimates, not harvested results; the researchers themselves flag the gap between trend and target.

"It is the highest score we've had," Heath Kelsey, director of the integration and application network at UMCES, said at a press conference Tuesday. "Trends are improving. We're not getting it as far and as fast as we would like to see it, of course. But that trend of improvement is really important and we should be proud of that."

The takeaway: conditions are measurably better, but the pace still leaves the bay short of its goals.

What changes under the 2040 agreement?

The Chesapeake Executive Council — the governors of the six watershed states, the D.C. mayor, the Chesapeake Bay Commission chair and the EPA administrator — agreed last fall to replace the 2014 Watershed Agreement after key 2025 commitments, including nitrogen and phosphorus reductions, went unmet.

The new deal sets a 2040 deadline. Signatories pledged to "accelerate completion of all interim water quality planning targets" under Watershed Implementation Plans and two-year milestones. By the end of 2030, they expect to revise planning targets with updated modeling, and commitments will be updated every six years across four focus areas: Thriving Habitats, Fisheries and Wildlife, Clean Water, Healthy Landscapes and Engaged Communities.

One sentence in plain words: the states bought themselves fifteen more years, with a data reset due by 2030.

Where does the federal pullback leave farmers?

Last month, President Donald Trump revoked the 2009 executive order that coordinated federal bay restoration, arguing the document caused "harmful economic impacts on affected Americans" — citing state stormwater management fees — and that state and local programs had already delivered "significant improvements in water quality." The new order directs USDA to concentrate working lands and land retirement programs in priority watersheds and requires EPA to publish an annual bay action plan.

Keisha Sedlacek, senior policy director for the Chesapeake Bay Foundation, said the 2009 order "has really been the foundation of bay restoration progress" and that its revocation "weakens federal leadership accountability and coordination." If agencies such as EPA, USDA, USGS, NOAA or the Fish and Wildlife Service pull back, she said, it "would be detrimental to the work that we do moving forward." Still, she conceded: "It's unclear in some ways how this will actually play out."

What are states paying farmers to do?

State programs now carry much of the load, and the stakes are high: according to a CBF handout, state pollution reduction plans call for 90% of remaining reductions to come from agriculture.

• Virginia: a $20 million pay-for-performance pilot. The Virginia Dairymen's Association received $4.2 million for feed management, manure handling and fertilizer practices believed to prevent roughly 115,600 pounds of nitrogen release.
• Maryland: a $47 million program funding projects estimated to have kept 1.3 million pounds of nitrogen out of state waters, including giant miscanthus for chicken bedding, precision fertilizer application, and woodchip bioreactors filtering nitrates from 152 acres of farm ditches. Maryland's agriculture department also runs the Leaders in Environmentally Engaged Farming program, prioritizing equipment funding for cover crops, buffers and conservation tillage.
• Pennsylvania: farmers in Lancaster have invested heavily in manure injection and other practices to cut sediment.
• Regulation: Maryland bars phosphorus application on saturated ground, and basin states require nutrient management plans for at least some farm operations.

Alex Echols, program strategist for the Campbell Foundation's agriculture program, said leading farmers have shifted "from setting their goals on maximum yield to maximum profit," improving nutrient-use efficiency and the economic return on inputs. He cautioned that farm-level reductions can take several years to register in bay water quality.

Can the funding pipeline hold?

CBF is pressing Congress to authorize the Chesapeake Bay States' Partnership Initiative, which USDA launched in 2022 to steer $22.5 million from existing conservation programs into the watershed, and to broaden Conservation Reserve Program eligibility and prioritize grazing practices within EQIP. Sedlacek also noted a persistent shortage of USDA technical assistance staff — worse today, she said, after recent workforce reductions — and called passage of a farm bill "extremely helpful" for keeping conservation dollars flowing.

Every promised dollar, however, now depends on a federal apparatus whose role the executive branch has just cut back — and on whether states can convert payments into measured pounds of nitrogen kept out of the water.