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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 p, 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) 506,472 43.2 43.2
Zinc, total (as Zn) 228,880 19.5 62.8
Manganese, total (as Mn) 130,480 11.1 73.9
Chlorine, total residual 75,984 6.49 80.4
Fluoride, total (as F) 68,691 5.86 86.3
Aluminum, total (as Al) 31,328 2.67 88.9
Cyanide, total (as CN) 30,111 2.57 91.5
Silver, total (as Ag) 15,842 1.35 92.9
Chromium, total (as Cr) 12,260 1.047 93.9
Lead, total recoverable 8,919 0.76 94.7

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
050200050808 Streets Run-Monongahela River 930,194
040400010603 Calumet River-Frontal Lake Michigan 31,701
050200050806 Piney Fork-Peters Creek 29,874
060300021104 Fox Creek 29,807
050301011109 Wills Creek-Ohio River 28,733
040900040407 River Rouge 16,970
071200030406 Headwaters Grand Calumet River 13,102
071401010402 Horseshoe Lake 6,530
110200021202 City of Fearnowville-Arkansas River 5,011
050301010303 Kilbuck Run-Ohio River 3,784

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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 T HOMSON PLANT BRADDOCK, PA 3312 050200050808 Iron 504,344
PA0094510 USS MON VALLEY WORKS - EDGAR T HOMSON PLANT BRADDOCK, PA 3312 050200050808 Zinc 227,613
PA0094510 USS MON VALLEY WORKS - EDGAR T HOMSON PLANT BRADDOCK, PA 3312 050200050808 Manganese 129,703
PA0094510 USS MON VALLEY WORKS - EDGAR T HOMSON PLANT BRADDOCK, PA 3312 050200050808 Total Residual Chlorine 47,526
AL0070068 NUCOR STEEL DECATUR LLC TRINITY, AL 3312 060300021104 Aluminum 28,622
PA0094510 USS MON VALLEY WORKS - EDGAR T HOMSON PLANT BRADDOCK, PA 3312 050200050808 Fluoride 20,931
MI0043524 FORD MOTOR CO ROUGE POWER & UTILITIES OPERATIONS DEARBORN, MI 3312 040900040407 Silver 15,828
IN0000205 ARCELORMITTAL INDIANA HARBOR LLC EAST CHICAGO, IN 3312 040400010603 Fluoride 15,003
PA0004472 USS - CLAIRTON PLANT CLAIRTON, PA 3312 050200050806 Total Residual Chlorine 14,007
PA0004472 USS - CLAIRTON PLANT CLAIRTON, PA 3312 050200050806 Cyanide 13,477

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