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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 (TRI)

EPA 304M Annual Review icon — Indicates load was altered by EPA’s 304M Annual Review. You can hover over the green flag to see the original load from the TRI data.

Top Chemicals - Toxic-Weighted Pounds (TWPE) (2011)
Chemical Name Direct TRI TWPE (lb-eq/yr) Indirect TRI TWPE (lb-eq/yr) Total TRI TWPE (lb-eq/yr) % of Category TWPE Cumulative % of
Category TWPE
NITRATE COMPOUNDS 30,920 148 31,068 34.3 34.3
LEAD AND LEAD COMPOUNDS 19,558 2,796 22,355 24.7 59.03
POLYCYCLIC AROMATIC COMPOUNDS 11,698  Original TRI load is 11,643 0 11,698 12.9 71.9
MANGANESE AND MANGANESE COMPOUNDS 5,674 79.1 5,753 6.35 78.3
COPPER AND COPPER COMPOUNDS 3,910 186 4,096 4.52 82.8
MERCURY AND MERCURY COMPOUNDS 3,312 124 3,437 3.79 86.6
ZINC AND ZINC COMPOUNDS 2,420 126 2,546 2.81 89.4
CADMIUM AND CADMIUM COMPOUNDS 2,245 0 2,245 2.48 91.9
ANTHRACENE 1,608 0 1,608 1.77 93.7
CHROMIUM AND CHROMIUM COMPOUNDS 1,225 29.3 1,254 1.38 95.09

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Direct TRI TWPE (lb-eq/yr) Indirect TRI TWPE (lb-eq/yr) Total TRI TWPE (lb-eq/yr)
050301011109 Wills Creek-Ohio River 11,340  Original load is 11,285 0 11,340
040400010603 Calumet River-Frontal Lake Michigan 10,373 0 10,373
050200050807 Fallen Timber Run-Monongahela River 6,224 0 6,224
040400010403 Coffee Creek-East Arm Little Calumet River 4,149 0 4,149
050400040301 Robinson Run-Muskingum River 3,769 0 3,769
071401010402 Horseshoe Lake 2,210 0 2,210
020402030604 Laurel Run-Schuylkill River 1,292 11.7 1,304
050301020603 McCullough Run-Shenango River 945 0 945
050800020704 Dicks Creek 560 94.3 655
050100071001 Hinckston Run-Conemaugh River 646 0 646

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Top Facility Discharges in Toxic-Weighted Pounds (TWPE) (2011)
TRI Facility ID Facility Name City, State NAICS Code HUC-12 Code Top Chemical Top Chemical Direct TRI TWPE (lb-eq/yr) Top Chemical Indirect TRI TWPE (lb-eq/yr) Top Chemical Total TRI TWPE (lb-eq/yr)
47635KSTLC6500N AK STEEL CORP (ROCKPORT WORKS ) ROCKPORT, IN 331110 NITRATE COMPOUNDS 13,702 0 13,702
26037WHLNGROUTE MOUNTAIN STATE CARBON LLC FOLLANSBEE, WV 324199 050301011109 POLYCYCLIC AROMATIC COMPOUNDS 8,727  Original load is 8,672 0 8,727
44125MRCNS4300E CHARTER STEEL CLEVELAND CUYAHOGA HEIGHTS, OH 331110 LEAD AND LEAD COMPOUNDS 3,914 2,468 6,383
46402SSGRYONENO USS GARY WORKS GARY, IN 331110 040400010603 NITRATE COMPOUNDS 6,123 0 6,123
43812CSHCTSTATE AK STEEL CORP COSHOCTON WORKS COSHOCTON, OH 331110 050400040301 NITRATE COMPOUNDS 3,659 0 3,659
41045NRTHMUS42E NORTH AMERICAN STAINLESS GHENT, KY 331110 NITRATE COMPOUNDS 2,332 0 2,332
35064SSFRFVALLE US STEEL CORP-FAIRFIELD WORKS FAIRFIELD, AL 331110 031601120101 POLYCYCLIC AROMATIC COMPOUNDS 2,321 0 2,321
15025SSCLR400ST USS-CLAIRTON PLANT CLAIRTON, PA 324199 050200050807 NITRATE COMPOUNDS 1,717 0 1,717
15025SSCLR400ST USS-CLAIRTON PLANT CLAIRTON, PA 324199 050200050807 ANTHRACENE 1,600 0 1,600
44105SGCLV3060E ARCELORMITTAL CLEVELAND LLC CLEVELAND, OH 331110 CADMIUM AND CADMIUM COMPOUNDS 1,548 0 1,548

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