Long-term Fixed Station
Monthly Monitoring Data Query

Choose station(s), a date range, and your parameters of interest.
Click "Submit" to download your data.

Press 'CTRL' to select up to 3 stations. View map of Maryland long term monitoring stations (PDF)


2. Select Date Range: Enter desired date range in mm/dd/yyyy format.
Note on Historical Data Downloads: The Chesapeake Bay Program DataHub API limits individual requests to a maximum 10-year date range per download to maintain server stability. If you require historical data spanning back to 1984, please execute separate downloads in 10-year increments (e.g., 1984-1994, 1994-2004, etc.).
    
Earliest is 01/16/1984 Latest is 10/09/2026

3. Choose Parameter(s):    















Nitrogen:
Carbon:




 Phosphorus:
   
Please be patient while your file is downloaded.
Check your "Downloads" folder, file name will be: 'EOTBLongTerm_09Oct2026.csv'