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Discharge Monitoring Report (DMR) Pollutant Loading Tool

The Loading Tool is being transitioned into ECHO to increase user access to data and streamline site maintenance. The beta version is now available for testing. EPA plans to retire this site in late November 2017. Current site functionality will be available in ECHO.

Note: This area of the DMR Loading Tool includes data used for EPA's annual review of industrial effluent discharges. EPA's Office of Water is responsible for developing programs and tools authorized under the Clean Water Act (CWA), which enables EPA and the states to protect and restore the Nation's waters. The CWA requires EPA to annually review and, if appropriate, revise its water pollution control technology-based regulations, called "effluent limitations guidelines" or "effluent guidelines" that limit the discharge of pollutants to waters of the U.S. from industrial facilities. As part of the EPA's annual reviews, EPA estimates the load of pollutants discharged using a combination of discharge monitoring report (DMR) data, from ICIS-NPDES, and Toxics Release Inventory (TRI) data. EPA also assigns a relative toxic weight to the estimated loads to rank industrial categories by toxic weighted pound equivalents (TWPE). For more background on EPA's effluent guidelines program see EPA's Effluent Guidelines website.

EPA reviews the DMR and TRI data used to calculate effluent loads and TWPE for accuracy prior to further investigating industrial categories for possible effluent guideline revisions. For identified outlier data, EPA contacts states and facilities to confirm and update (if appropriate) data values and units. For information on the methodology and types of changes identified, see EPA's most recent odd-numbered year Annual Effluent Guidelines Review Report on the Effluent Guidelines Plan webpage. Because of this review and EPA's methodology for interpreting data and calculating loads, the calculated loads and category rankings may differ from original calculations using DMR and TRI data that have not been updated. Data that have been updated by EPA's annual reviews are indicated by green flags designating that a change has been made to a concentration, quantity, or flow value. A listing of the DMR and TRI data changes from the most recent annual review is available in the Annual Effluent Guidelines Review Report Appendices.

Point Source Category Information - Airport deicing (DMR)

EPA 304M Annual Review flag — Indicates load was altered by EPA’s 304M Annual Review. You can hover over the green flag to see the original load from the DMR data.

Top Pollutants - Toxic-Weighted Pounds (TWPE) (2017)
Pollutant Name Total DMR TWPE (lb-eq/yr) % of Category TWPE Cumulative % of
Category TWPE
Iron 4,236 39.4 39.4
Aluminum 4,050 37.6 77.07
Copper 894 8.31 85.3
Potassium 818 7.605 92.9
Nitrogen, nitrate dissolved 252 2.34 95.3
Zinc 159 1.48 96.8
Chloride 87.8 0.81 97.6
Ammonia as NH3 60.3 0.56 98.2
Ammonia as N 60.3 0.56 98.7
Propylene glycol 45.5 0.42 99.1

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Top Receiving Watersheds (2017)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
010900040902 Upper Narragansett Bay 4,459
050902030806 Upper Gunpowder Creek 568
071401030101 Headwaters Dry Fork 278
051202011309 East Fork White Lick Creek 152
102901060204 Headwaters Clear Creek 99.3
041100010203 Rocky River 39.2
051302020102 Mill Creek Lower 23.4
041000010103 Middle Creek-Swan Creek 21.6
110100030102 Turkey Creek 20.02
020600031102 Deep Run-Patapsco River 19.09

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Top Facility Discharges in Toxic-Weighted Pounds (TWPE) (2017)
NPDES ID Facility Name City, State SIC Code HUC-12 Code Top Pollutant Top Pollutant TWPE (lb-eq/yr)
RI0021598 T F GREEN AIRPORT WARWICK, RI 4581 010900040902 Iron 4,236
TX0025101 DALLAS FORT WORTH INTERNATIONAL AIRPORT BOARD DALLAS, TX 4581 120301031006 Aluminum 3,963
TX0025101 DALLAS FORT WORTH INTERNATIONAL AIRPORT BOARD DALLAS, TX 4581 120301031006 Copper 874
KY0082864 CINCINNATI/N KY INTL AIRPORT HEBRON, KY 4581 050902030806 Potassium 568
MOR80F001 ROLLA NATIONAL AIRPORT VICHY, MO 4581 071401030101 Nitrogen, nitrate dissolved 173
TX0025101 DALLAS FORT WORTH INTERNATIONAL AIRPORT BOARD DALLAS, TX 4581 120301031006 Zinc 159
IN0058238 INDIANAPOLIS AIRPORT AUTHORITY INDIANAPOLIS, IN 4581 051202011309 Potassium 148
RI0021598 T F GREEN AIRPORT WARWICK, RI 4581 010900040902 Potassium 101
RI0021598 T F GREEN AIRPORT WARWICK, RI 4581 010900040902 Aluminum 85.8
MOR80F001 ROLLA NATIONAL AIRPORT VICHY, MO 4581 071401030101 Chloride 60.5

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