Chesapeake Bay Nontidal Network: 1985-2023 Total Phosphorus Trends and Change in Flow-Normalized Per Acre Load

This map displays the long-term trend for total phosphorus, as well as the total change in flow-normalized per-acre loads for total phosphorus across the Chesapeake Bay Watershed from 1985 to 2023. 

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