Jump to main content or area navigation.

Contact Us

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 more information on the types of errors identified, see EPA's Technical Support Document for the 2010 Effluent Guidelines Program (PDF) (255 pp, 3.4MB). Because of this review, and EPA's methodology for interpreting data and calculating loads (explained in EPA's Technical Support Document for the Annual Review of Existing Effluent Guidelines and Identification of Potential New Point Source Categories), the calculated loads and category rankings may differ using DMR and TRI data that has not been updated. Data that have been updated by EPA's annual reviews are flagged by green flags designating that a change has been made to a concentration, quantity, or flow value. View a listing of the changes for the most recent annual review (PDF) (1 pg, 7K).

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, total (as Al) 47,547 55.5 55.5
Glycol (total) 24,950 29.1 84.6
Heptachlor epoxide 4,159 4.85 89.5
Ethylene glycol 3,693 4.31 93.8
Copper, total (as Cu) 2,807 3.27 97.1
Propylene glycol, total 1,654 1.93 99.08
Zinc, total (as Zn) 548 0.64 99.7
Nitrogen, ammonia total (as N) 162 0.18 99.9
Zinc, total recoverable 19.07 0.022 99.9
Arsenic, total (as As) 10.4 0.012 99.9

Download All Data

Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
080102110103 Lower Nonconnah Creek 24,973
010900010402 Outlet Saugus River-Frontal Broad Sound 5,361
180500041001 San Francisco Bay Estuaries 160
040900020106 Harms Drain-Frontal Lake Erie 10.7
041402020902 Mud Creek 6.81
040900040502 Brownstone Creek 6.36
071200040506 Bensenville Ditch-Des Plaines River 5.96
120401040203 South Mayde Creek 4.56
020301020101 Kensico Reservoir 1.94
071401050301 Bois Brule Creek 0.24

Download All Data

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/FT. WORTH INT'L AIRPORT DALLAS, TX 4581 120301031006 Aluminum 47,547
TN0072940 MEMPHIS INTERNATIONAL AIRPORT MEMPHIS, TN 4581 080102110103 Ethylene glycol 24,950
HI0110078 US MARINE CORPS BASE HAWAII M C B H KANEOHE BAY, HI 4581 200600000205 Heptachlor epoxide 4,159
MA0000787 LOGAN INTERNATIONAL AIRPORT BOSTON, MA 4581 010900010402 Ethylene glycol 3,693
TX0025101 DALLAS/FT. WORTH INT'L AIRPORT DALLAS, TX 4581 120301031006 Copper 2,783
MA0000787 LOGAN INTERNATIONAL AIRPORT BOSTON, MA 4581 010900010402 Propylene glycol 1,651
TX0025101 DALLAS/FT. WORTH INT'L AIRPORT DALLAS, TX 4581 120301031006 Zinc 545
CA0028070 SAN FRANCISCO INTERNATIONAL AIRPORT WQCP SAN FRANCISCO, CA 4581 180500041001 Ammonia as N 127
TN0072940 MEMPHIS INTERNATIONAL AIRPORT MEMPHIS, TN 4581 080102110103 Ammonia as N 22.6
CA0028070 SAN FRANCISCO INTERNATIONAL AIRPORT WQCP SAN FRANCISCO, CA 4581 180500041001 Zinc 19.07

Download All Data

Top of Page

About the Data Glossary Error Correction Contact Us

Jump to main content.