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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).

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Point Source Category Information - Mineral Mining and Processing (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 1,489 60.6 1,550 50.5 50.5
POLYCYCLIC AROMATIC COMPOUNDS 604 0 604 19.7 70.2
MERCURY AND MERCURY COMPOUNDS 286 7.026 293 9.55 79.8
LEAD AND LEAD COMPOUNDS 167 71.006 238 7.75 87.5
COPPER AND COPPER COMPOUNDS 154 0.27 154 5.032 92.6
ZINC AND ZINC COMPOUNDS 83.2 0.401 83.6 2.72 95.3
MANGANESE AND MANGANESE COMPOUNDS 21.2 37.4 58.7 1.91 97.2
AMMONIA 15.09 27.08 42.18 1.37 98.6
CHROMIUM AND CHROMIUM COMPOUNDS 18.1 2.25 20.3 0.66 99.2
CADMIUM AND CADMIUM COMPOUNDS 14.7 0 14.7 0.48 99.7

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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)
050301011103 Carpenter Run-Ohio River 98.1 0 98.1
050100060501 Upper Redbank Creek 0 65.04 65.04
050301010310 Sixmile Run-Ohio River 59.6 0 59.6
031002060402 Kitchen Branch-Wolf Branch Frontal 59.6 0 59.6
041201040603 Cayuga Creek 0 11.3 11.3
040102011503 City of Cloquet-Saint Louis River 0 4.63 4.63
050302020102 Mile Run-Ohio River 3.5 0 3.5
051202081403 Beaver Creek 3.13 0 3.13
020502061205 Muddy Run-Lower West Branch Susquehanna River 1.56 0 1.56
080202020302 Middle Big Creek 1.55 0 1.55

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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)
31715NGLHRDEPOT BASF CORP ATTAPULGUS OPS ATTAPULGUS, GA 327992 031200030203 NITRATE COMPOUNDS 937 0 937
35125RVRSDTRUSS RIVERSIDE REFRACTORIES INC PELL CITY, AL 327124 031501060605 POLYCYCLIC AROMATIC COMPOUNDS 604 0 604
31404KTLST1800E BASF CORP - SAVANNAH OPERATIONS SAVANNAH, GA 327992 030601090307 NITRATE COMPOUNDS 526 0 526
72216M POBOX 3M CO - LITTLE ROCK LITTLE ROCK, AR 327999 COPPER AND COPPER COMPOUNDS 152 0 152
7038WBKRHG1FIRS BAKER HUGHES OILFIELD OPERATIONS INC MORGAN CITY, LA 327992 LEAD AND LEAD COMPOUNDS 85.12 0 85.12
26050HMRLGSIXTH HOMER LAUGHLIN CHINA CO NEWELL, WV 327112 050301011103 ZINC AND ZINC COMPOUNDS 80.7 0 80.7
28120NWNGC1725D NEW NGC INC (DBA NATIONAL GYPSUM CO) MOUNT HOLLY, NC 327420 MERCURY AND MERCURY COMPOUNDS 70.2 0 70.2
15864GLNGRRT28 GLEN-GERY CORP SUMMERVILLE, PA 327121 050100060501 LEAD AND LEAD COMPOUNDS 0 64.4 64.4
15077NWNGC168SH NGC INDUSTRIES LLC A SUBSIDIARY OF NEW NGC INC SHIPPINGPORT, PA 327420 050301010310 MERCURY AND MERCURY COMPOUNDS 58.5 0 58.5
33534NWNGC12949 NEW NGC INC (DBA NATIONAL GYPSUM CO) GIBSONTON, FL 327420 031002060402 MERCURY AND MERCURY COMPOUNDS 58.5 0 58.5

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