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 information on the methodology and types of changes identified, see EPA's most recent odd-numbered year Annual Effluent Guidelines Review Report 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.

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
Fluoride 36,785 21.2 21.2
Aluminum 16,601  Original DMR load is 35,691 9.57 30.8
Cyanide 19,912 11.4 42.2
Lead 18,697 10.7 53.08
Silver 15,842 9.14 62.2
Total Residual Chlorine 13,658 7.88 70.1
Benz[a]anthracene 6,885 3.97 74.08
Copper 6,552 3.78 77.8
Benzo[a]pyrene 5,231 3.018 80.8
Selenium 4,639 2.67 83.5

Download All Data

Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
050301011109 Wills Creek-Ohio River 55,787
060300021104 Fox Creek 10,712  Original DMR load is 29,802
040400010603 Calumet River-Frontal Lake Michigan 18,961
040900040407 River Rouge 17,018
071200030406 Headwaters Grand Calumet River 13,462
031602040103 Farris Creek-Barrow Creek 7,861
071401010402 Horseshoe Lake 6,530
110200021202 City of Fearnowville-Arkansas River 4,941
020600031204 Stoney Creek-Patapsco River-Chesapeake Bay 3,697
050400040301 Robinson Run-Muskingum River 3,366

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)
AL0070068 NUCOR STEEL DECATUR LLC TRINITY, AL 3312 060300021104 Aluminum 9,532  Original DMR load is 28,622
MI0043524 ROUGE STEEL CO DEARBORN, MI 3312 040900040407 Silver 15,828
IN0000281 UNITED STATES STEEL CORP - GARY WORKS FACILITY GARY, IN 3312 071200030406 Fluoride 10,182
WV0003336 MITTAL STEEL USA WEIRTON INC WEIRTON, WV 3312 050301011109 Fluoride 9,936
WV0004499 AK STEEL CORP FOLLANSBEE, WV 3312 050301011109 Cyanide 7,038
WV0004499 AK STEEL CORP FOLLANSBEE, WV 3312 050301011109 Benz[a]anthracene 6,885
AL0080233 AM/NS CALVERT CALVERT, AL 3312 031602040103 Lead 6,273
WV0003336 MITTAL STEEL USA WEIRTON INC WEIRTON, WV 3312 050301011109 Total Residual Chlorine 5,486
WV0004499 AK STEEL CORP FOLLANSBEE, WV 3312 050301011109 Benzo[a]pyrene 5,106
IL0000329 UNITED STATES STEEL CORPORATION GRANITE CITY, IL 3312 071401010402 Fluoride 4,884

Download All Data

Top of Page

About the Data Glossary Error Correction Contact Us

Jump to main content.