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DMR Loading Tool Data Downloads
The Discharge Monitoring Report (DMR) Pollutant Loading Tool (beta) is designed to help you determine who is discharging, what pollutants they are discharging and how much, and where they are discharging. The tool calculates pollutant loadings from permit and DMR data from EPA's Integrated Compliance Information System for the National Pollutant Discharge Elimination System (ICIS-NPDES). Data are available from the year 2007 to the present.
The DMR Loading Tool data downloads provide access to data and reference information supporting the pollutant loading calculations. Additional reference information is available on the DMR Loading Tool Technical Support Documents page.
- DMR Pollutant Parameters Used and Not Used by the Loading Tool (CSV) (200K) - List of DMR pollutant parameters from ICIS-NPDES and pollutant categories used in the Loading Tool. "Excluded_From_Loadings" indicates those parameters for which loadings cannot be calculated.
- Hypoxia Task Force Download Files (ZIP) (300K) - Includes Typical Pollutant Concentrations and Summary Statistics for Loading Calculations in the Hypoxia Task Force Nutrient Model. These data are calculated using 2015 DMR data following the HTF model methodology. The files are updated weekly as part of the ECHO data refresh.
Technical Background Information for DMR Pollutant Loading Calculations
Note: as creation of these files is automated, the file sizes below are approximate.
- 2015 (coming soon)
- 2016 (coming soon)
- 2017 (coming soon)
|EXTERNAL_PERMIT_NMBR||A nine-character code used to uniquely identify a permitted NPDES facility (NPDES ID). The NPDES permit program regulates the direct discharge of pollutants into U.S. waters.|
|DMR_YEAR||The calendar year of the pollutant discharge.|
|PERM_FEATURE_NMBR||A four-character code in ICIS-NPDES that identifies the point of discharge (e.g., outfall) for a facility. A NPDES permit may have multiple points of discharge.|
|MONITORING_LOCATION_CODE||A single-character code in ICIS-NPDES that indicates the sampling location for each pollutant measurement. The Loading Tool only includes locations for effluent sampling points. These include:
|LIMIT_SET_DESIGNATOR||A single-character code in ICIS-NDPES that groups limits that are set on a similar basis (e.g., monthly, annual, or seasonal limits). A limit set designator code is provided for each DMR measurement and limit.|
|LIMIT_SEASON_ID||A 1-digit code to indicate one of four subdivisions of the year.|
|MONITORING_PERIOD_END_DATE||The end date of the monitoring period for the discharge.|
|PARAMETER_DESC||The description/parameter name that corresponds to the parameter code.|
|PARAMETER_CODE||A five-character code in ICIS-NDPES that identifies the regulated pollutant parameter in a NPDES permit and specifies both the pollutant name and pollutant form (e.g., dissolved or suspended). Multiple parameters can apply to a single pollutant or CAS number.|
|DATA_FIELD||The ICIS-NPDES measurement field (e.g., quantity or concentration field) of the manual correction.|
|OLD_VALUE||The original value of the data field from ICIS-NPDES.|
|NEW_VALUE||The corrected value of the data field.|
|CORR_DESC||The description of the Correction Type Code. See Section 3.1 of the Technical Users Background Document for more information about corrections to DMR data.|
|CORRECTION_TYPE_CODE||The code used to classify the type of correction.|
|REVIEW_CYCLE||The general review cycle or date during which the data was reviewed and updated. Not Applicable (NA) indicates an automatic correction. "Annual Review" refers to EPA's Effluent Guidelines Program annual review of industrial effluent discharges.|