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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 - 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 507,233 44.1 44.1
Zinc 231,069 20.1 64.2
Manganese 130,593 11.3 75.6
Polychlorinated biphenyls 73,167 6.36 81.9
Total Residual Chlorine 69,426 6.042 88.03
Fluoride 46,230 4.023 92.05
Aluminum 14,734  Original DMR load is 33,824 1.28 93.3
Cyanide 24,894 2.16 95.5
Silver 15,828 1.37 96.8
Lead 12,074 1.0508 97.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
050200050808 Streets Run-Monongahela River 930,116
020402030702 Lower French Creek 73,461
050200050807 Fallen Timber Run-Monongahela River 29,874
060300021104 Fox Creek 10,717  Original DMR load is 29,807
040400010603 Calumet River-Frontal Lake Michigan 18,704
040900040407 River Rouge 17,030
071200030406 Headwaters Grand Calumet River 13,479
071401010402 Horseshoe Lake 6,530
110200021202 City of Fearnowville-Arkansas River 4,968
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 EDGAR THOMSON PLT BRADDOCK, PA 3312 050200050808 Iron 504,344
PA0094510 EDGAR THOMSON PLT BRADDOCK, PA 3312 050200050808 Zinc 227,612
PA0094510 EDGAR THOMSON PLT BRADDOCK, PA 3312 050200050808 Manganese 129,703
PA0013463 US STEEL FAIRLESS HILLS FACILITY FAIRLESS HILLS, PA 3312 020402030702 Polychlorinated biphenyls 73,167
PA0094510 EDGAR THOMSON PLT BRADDOCK, PA 3312 050200050808 Total Residual Chlorine 47,526
AL0070068 NUCOR STEEL DECATUR LLC TRINITY, AL 3312 060300021104 Aluminum 9,532  Original DMR load is 28,622
PA0094510 EDGAR THOMSON PLT BRADDOCK, PA 3312 050200050808 Fluoride 20,931
MI0043524 ROUGE STEEL CO DEARBORN, MI 3312 040900040407 Silver 15,828
PA0004472 USS - CLAIRTON PLANT CLAIRTON, PA 3312 050200050807 Total Residual Chlorine 14,007
PA0004472 USS - CLAIRTON PLANT CLAIRTON, PA 3312 050200050807 Cyanide 13,477

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