Chesapeake Bay 2019-2023 Per Acre Loads

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These maps display the average 5-year per acre loads of nutrients and sediment across the Chesapeake Bay Watershed from 2019 to 2023. 

Loads are defined as the mass of nutrient or sediment passing a monitored location per unit time. A per-acre load, also known as a yield, is load divided by the area of the watershed upstream of the monitored location.

Learn more about Chesapeake Bay Water-Quality Loads and Trends and the USGS Nontidal Network.