The 1925 Chesapeake Bay Report Card was produced to celebrate the UMCES Centennial. Inspired by 1920s design, this report card offers a glimpse of what a Chesapeake Bay Report Card might have been like in 1925, when UMCES was founded. The state of the Bay in 1925 is not an accurate scientific assessment, but an estimation based on informed opinions and broad historical generalizations.

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This report card provides a transparent, timely, and geographically detailed assessment of Chesapeake Bay and its Watershed. Since 2016, UMCES has engaged stakeholders throughout the watershed to transform the report card into an evaluation of the Chesapeake Watershed health. Watershed health includes traditional ecological indicators, but also economic and societal indicators.

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El Reporte de Salud de la bahía de Chesapeake de 1925 se elaboró ​​para celebrar el centenario de la UMCES. Inspirado en el diseño de la década de 1920, este informe ofrece una visión de cómo habría sido un Reporte de salud sobre la bahía de Chesapeake en 1925, cuando se fundó la UMCES. El estado de la bahía en 1925 no es una evaluación científica precisa, sino una estimación basada en opiniones fundamentadas, y generalizaciones históricas generales.

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Este informe proporciona una evaluación transparente, oportuna, y geográficamente detallada de la bahía de Chesapeake y su cuenca. Desde 2016, UMCES ha involucrado a las partes interesadas de toda la cuenca para transformar el informe en una evaluación de la salud de la cuenca de Chesapeake. Los indicadores de la bahía evalúan la salud del ecosistema acuático, mientras que los indicadores de la cuenca hidrográfica cubren las condiciones ecológicas, sociales, y económicas.

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On April 1, 2025, the Chesapeake Bay Foundation (CBF) and University of Maryland Center for Environmental Science (UMCES) co-hosted the first joint Chesapeake Bay Report Card Networking Meeting at CBF’s Annapolis headquarters. Over 30 stakeholders from nonprofits, government, academia, and community groups gathered to advance a shared vision for more inclusive, responsive, transparent, and collaborative socio-environmental reporting across the watershed.

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Reductions of nitrogen, phosphorus, and sediment loads have been the focus of watershed restoration in many regions for improving water quality, including the Chesapeake Bay. Watershed models and riverine monitoring data can provide important information on the progress of load reductions but do not always generate consistent interpretations.

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Seasonal hypoxia (dissolved oxygen [DO] levels ≤ 2 mg/l) poses a severe threat to coastal ecosystems globally, including the largest estuary in the United States, the Chesapeake Bay. This V-shaped drowned river valley features shallow flanks, where the deepest waters experience persistently low DO levels typically initiated during the spring and ending in late summer or early autumn. Reports on low DO conditions in the Chesapeake Bay date back over a century.

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Many coastal ecosystems have suffered from cultural eutrophication and dead zones. In the Chesapeake Bay, water quality degradation is manifested in low dissolved oxygen, poor water clarity, and decreased submerged aquatic vegetation acreage.

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Many estuaries, including Chesapeake Bay, have suffered from undesirable conditions of algae blooms, poor water clarity, and low dissolved oxygen (DO). To better understand the status and trends of DO criteria attainment deficit (AD), we conducted a comprehensive assessment using monitoring data in the period of 1985–2022 and focused on the comparison of trends among 13 tidal systems.

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From 2022-2023, the COAST Card project held a series of listening sessions to stimulate community engagement throughout the Potomac Watershed. This poster summarizes the results of the activities at those listening sessions.

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