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):

TRI_FACILITY_NPDES
TRI_FACILITY_NPDES_HISTORY

Data Source:

EPA Form R or EPA Form A:
Part I Section 4.9

Properties:

Type: Character
Length: 10
Mandatory

Definition Source: TRI Program Division

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TRI Table & Column Information
Envirofacts Overview

Column Name: NPDES_NUM

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