National Environmental Exchange Network (NEIEN)

BMP information is submitted by the major jurisdictions to the Chesapeake Bay Program Office using NEIEN. NEIEN protocols dictate the use of BMP-specific fields and units. Such information is utilized by CAST for the estimation of nutrient and sediment loads generated by different source areas within the Chesapeake Bay watershed.

Annual Progress Report Submitted Data

Each of the seven major jurisdictions in the Chesapeake Bay submit BMP data to NEIEN using the protocols above. Reports showing the successes and errors of each submission are available for download. These reports include a summary of the number of records that were successful and those with errors. The type of error is listed. Some BMPs require inspection to continue to receive credit toward Bay TMDL load reductions. The reports show which records included valid inspection dates within the required time period and the status of the inspection (pass/fail). The reports also show the amount of BMPs that would be credited if all of the BMP inspections were within the required time period and valid. Data that is marked as an error is not included in CAST. To view the most raw form of the BMP data in the annual progress scenarios, download the BMP Input Files from CAST.