Chesapeake Bay 2014-2023 Trends and Per Acre Loads

These maps display the average 10-year trends and per acre loads of nutrients and sediment across the Chesapeake Bay Watershed from 2014 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.