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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 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 - Iron and steel manufacturing (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
Iron, total (as Fe) 505,521 46.7 46.7
Zinc, total (as Zn) 227,889 21.05 67.7
Manganese, total (as Mn) 130,292 12.03 79.7
PCBs Dry Weather Analysis 73,167 6.75 86.5
Fluoride, total (as F) 63,453 5.86 92.4
Silver, total (as Ag) 15,828 1.46 93.8
Benzo(a)pyrene 8,321 0.76 94.6
Benzo(a)anthracene 6,885 0.63 95.2
Cyanide, total (as CN) 6,487 0.59 95.8
Chlorine, total residual 5,664 0.52 96.4

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
050200050808 Streets Run-Monongahela River 882,519
020402010405 Mill Creek-Silver Lake 73,389
050301011109 Wills Creek-Ohio River 38,112
040400010603 Calumet River-Frontal Lake Michigan 34,238
040900040407 River Rouge 16,997
040400010403 Coffee Creek-East Arm Little Calumet River 9,715
110200020905 Salt Creek-Arkansas River 6,463
050800020704 Dicks Creek 2,686
050100090304 Chartiers Run-Allegheny River 2,557
050400010503 West Branch Nimishillen Creek 1,155

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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)
PA0094510 USS MON VALLEY WORKS - EDGAR THOMSON PLANT BRADDOCK, PA 3312 050200050808 Iron 504,344
PA0094510 USS MON VALLEY WORKS - EDGAR THOMSON PLANT BRADDOCK, PA 3312 050200050808 Zinc 227,540
PA0094510 USS MON VALLEY WORKS - EDGAR THOMSON PLANT BRADDOCK, PA 3312 050200050808 Manganese 129,703
PA0013463 US STEEL FAIRLESS HILLS WORKS FAIRLESS HILLS, PA 3312 020402010405 Polychlorinated biphenyls 73,167
PA0094510 USS MON VALLEY WORKS - EDGAR THOMSON PLANT BRADDOCK, PA 3312 050200050808 Fluoride 20,931
MI0043524 SEVERSTAL DEARBORN LLC DEARBORN, MI 3312 040900040407 Silver 15,828
IN0000205 ARCELORMITTAL INDIANA HARBOR LLC EAST CHICAGO, IN 3312 040400010603 Fluoride 15,003
IN0000281 USS GARY WORKS GARY, IN 3312 040400010603 Fluoride 10,182
WV0003336 MITTAL STEEL USA WEIRTON INC WEIRTON, WV 3312 050301011109 Fluoride 9,875
WV0004499 SEVERSTAL WHEELING INC - FOLLANSBEE FOLLANSBEE, WV 3312 050301011109 Benz[a]anthracene 6,885

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