Nutrient Point Source

Data Type: Monthly data of flow and concentrations of TN, NH3, NO23, TON, TKN, TP, PO4 and TOP

Date Range: 1970-Present

Data is currently being collected under the following grants: CB97323001, CB97321701, CB97322001.

This database includes both monitored and estimated data submitted from or approved by each jurisdiction. Detailed information about the data is available in the documentation listed below. The primary purposes of this database are to track the point source nutrient load reduction and to provide input decks to the Chesapeake Bay watershed model and water quality model. This database does NOT serve any compliance related purposes. For the compliance related information, please check the EPA Permit Compliance System