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Discharge Monitoring Report (DMR) Pollutant Loading Tool

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 (PDF) (169 pp, 2MB) 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 (PDF) (241 pp, 3.3MB).

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) (2011)
Pollutant Name Total DMR TWPE (lb-eq/yr) % of Category TWPE Cumulative % of
Category TWPE
Aluminum 47,565 58.9 58.9
Ethylene glycol 18,997 23.5 82.5
Heptachlor epoxide 4,159 5.15 87.7
Copper 2,795 3.46 91.1
Iron 2,175 2.69 93.8
Propylene glycol 1,843 2.28 96.1
Potassium 1,615 2.0033 98.1
Zinc 574 0.71 98.8
Ammonia as N 290 0.35 99.2
Manganese 161 0.19 99.4

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
080102110103 Lower Nonconnah Creek 14,480
010900010402 Outlet Saugus River-Frontal Broad Sound 5,361
010900040902 Upper Narragansett Bay 2,423
050902030806 Upper Gunpowder Creek 864
051401021201 Northern Ditch 794
050600011505 Mason Run-Big Walnut Cr. 630
101201110401 Ellsworth Air Force Base-Boxelder Creek 231  Original DMR load is 231
180500041001 San Francisco Bay Estuaries 160
051202011309 East Fork White Lick Creek 137
041100010203 Rocky River 134

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Top Facility Discharges in Toxic-Weighted Pounds (TWPE) (2011)
NPDES ID Facility Name City, State SIC Code HUC-12 Code Top Pollutant Top Pollutant TWPE (lb-eq/yr)
TX0025101 DALLAS FORT WORTH INTERNATIONAL AIRPORT DALLAS, TX 4581 120301031006 Aluminum 47,547
TN0072940 MEMPHIS INTERNATIONAL AIRPORT MEMPHIS, TN 4581 080102110103 Ethylene glycol 14,458
HI0110078 US MARINE CORPS BASE HAWAII M C B H KANEOHE BAY, HI 4581 200600000206 Heptachlor epoxide 4,159
MA0000787 LOGAN INTERNATIONAL AIRPORT BOSTON, MA 4581 010900010402 Ethylene glycol 3,693
RI0021598 T F GREEN AIRPORT WARWICK, RI 4581 010900040902 Iron 2,175
MA0000787 LOGAN INTERNATIONAL AIRPORT BOSTON, MA 4581 010900010402 Propylene glycol 1,651
KY0082864 CINCINNATI/N KY INTL AIRPORT HEBRON, KY 4581 050902030806 Potassium 703
OH0124311 PORT COLUMBUS INTERNATIONAL AIRPORT COLUMBUS, OH 4581 050600011505 Ethylene glycol 569

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