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Column Name: NPDES_NUM

Description: The permit number of a specific discharge to a water body under the National Pollutant Discharge Elimination System (NPDES) of the Clean Water Act (CWA). Not all facilities will have a NPDES permit number. A facility may have multiple NPDES permit numbers. The NPDES permit number may not pertain to the toxic chemical reported to TRI.

Envirofacts Table Name(s):
Data Source:
  • Data Element:
  • ADABAS File:

  • Type:CHAR
  • Length:10

Definition Source:TRI Data Dictionary