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Water Pollutant Loading Tool - Resources

On this page:

General Resources and Fact Sheets

Technical Reference Documents

Geographic Information

Pollutant Information

NPDES DMR Parameters

Select a link to download the parameter and pollutant category lists. The files are refreshed weekly.

NPDES DMR Parameters: Data Element Descriptions
Element Description
EXCLUDED_FROM_LOADINGS Indicates those parameters for which loadings cannot be calculated.
COUNT_PERMITS_WITH_LIMITS Indicates the number of distinct NPDES permits that have or had limits and/or monitoring requirements for a parameter at any time between January 1, 2007 to the present.
TOXIC_WEIGHTING_FACTOR The value of the toxic weighting factor, used to convert pounds of pollutant to Toxic Weighted Pounds Equivalent (TWPE).
QNCR_POLL_CODE The Quarterly Noncompliance Report (QNCR) pollutant code indicates whether the parameter is categorized as SNC Group 1, Group 2, or Not Used for the QNCR, for the purposes of calculating reportable noncompliance (RNC). For background on SNC pollutant groupings, refer to the Memorandum: Revision of NPDES Significant Noncompliance (SNC) Criteria to Address Violations of Non-Monthly Average Limits.

TRI Chemicals

Information pertaining to both DMR and TRI

Facility Program Flags

Note: See About Loading Tool Data for the last update dates for the lists below.

Industrial Classification

Note: As creation of the ZIP files is automated and updated weekly as part of the Loading Tool data refresh, the file sizes below are approximate.

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