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
EXCLUDED_FROM_LOADINGSIndicates those parameters for which loadings cannot be calculated.
COUNT_PERMITS_WITH_LIMITSIndicates 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_FACTORThe value of the toxic weighting factor, used to convert pounds of pollutant to Toxic Weighted Pounds Equivalent (TWPE).
QNCR_POLL_CODEThe 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.