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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 - CCH (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
Polychlorinated biphenyls (PCBs) 337,264 45.1 45.1
Hexachlorobenzene 276,945 37.05 82.1
Sulfide, total (as S) 42,754 5.72 87.8
Chlorine, total residual 30,618 4.096 91.9
Mercury, total (as Hg) 20,959 2.804 94.7
Aluminum, total recoverable 11,404 1.52 96.3
Copper, total (as Cu) 10,287 1.37 97.6
Chloride (as Cl) 5,856 0.78 98.4
Zinc, total (as Zn) 1,614 0.21 98.6
Manganese, total (as Mn) 1,024 0.13 98.8

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
080802060301 Maple Fork-Bayou D'Inde 15,893
060400060502 Guess Creek-Tennessee River 14,710
060200021406 Hiwassee River-Dry Valley 7,042
120401040706 Goose Creek-Frontal Galveston Bay 2,035
041201040605 Niagara Falls-Niagara River 1,761
080701000105 Claiborne Island 1,739
111403060411 Tete Bayou-Frontal Caddo Lake 1,228
120402030106 Cedar Point Lateral-Cedar Bayou 998
080901000101 Mississippi River-Bonnet Carre Spillway 454
060300050803 Sweetwater Creek-Tennessee River 411

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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)
OH0007269 DOVER CHEMICAL CORP DOVER, OH 2819 Polychlorinated biphenyls 337,264
WV0004359 PPG INDUSTRIES INCORPORATED NEW MARTINSVILLE, WV 2812 Hexachlorobenzene 246,986
WV0004359 PPG INDUSTRIES INCORPORATED NEW MARTINSVILLE, WV 2812 Sulfide 42,754
KY0001457 OXY VINYLS LP LOUISVILLE LOUISVILLE, KY 2821 051401010904 Total Residual Chlorine 23,781
TX0053813 SHINTECH INCORPORATED FREEPORT, TX 2821 120904010308 Hexachlorobenzene 16,732
KY0003484 WESTLAKE MONOMERS CORPORATION CALVERT CITY, KY 2812 060400060502 Hexachlorobenzene 13,227
WV0004359 PPG INDUSTRIES INCORPORATED NEW MARTINSVILLE, WV 2812 Aluminum 11,404
LA0000761 PPG INDUSTRIES INC - LAKE CHARLES COMPLEX LAKE CHARLES, LA 2869 080802060301 Mercury 8,543
LA0000761 PPG INDUSTRIES INC - LAKE CHARLES COMPLEX LAKE CHARLES, LA 2869 080802060301 Copper 7,152
TN0002461 OLIN CORP CHARLESTON PLANT CHARLESTON, TN 2812 060200021406 Mercury 6,826

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