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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 pg, 7K).

Top Industrial Dischargers of Toxic Pollutants

Instructions. Select a reporting year and click View Rankings to view the top industrial discharges of toxic pollutants for a specific year. Click a hyperlinked TWPE value in the result to view more DMR or TRI detail for a point source category.

2014 Point Source Category Rankings

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 or TRI data.

Rank 40 CFR Part Industrial Sector DMR TWPE (lb-eq/yr) TRI TWPE (lb-eq/yr) Total TWPE (lb-eq/yr) Cumulative %
of Total TWPE (lb-eq/yr)
1 445 Landfills 620,362,783 0 620,362,783 98.8
2 420 Iron and steel manufacturing 2,181,764 0 2,181,764 99.1
3 423 Steam electric power generating 1,044,901  Original DMR load is 1,044,899 0 1,044,901 99.3
4 429 Timber products processing 811,090 0 811,090 99.4
5   Drinking Water Treatment 692,833  Original DMR load is 692,580 0 692,833 99.5
6 414 Organic chemicals, plastics and synthetic fibers 603,807 0 603,807 99.6
7 414.1 CCH 554,145 0 554,145 99.7
8 422 Phosphate manufacturing 358,100 0 358,100 99.8
9 419 Petroleum refining 350,109  Original DMR load is 350,133 0 350,109 99.8
10 430 Pulp, paper and paperboard 222,992 0 222,992 99.8
11 415 Inorganic chemicals manufacturing 110,220 0 110,220 99.9
12 421 Nonferrous metals manufacturing 93,406 0 93,406 99.9
13 433 Metal Finishing 72,190 0 72,190 99.9
14 418 Fertilizer manufacturing 46,160 0 46,160 99.9
15 436 Mineral Mining and Processing 43,728 0 43,728 99.9
16   Miscellaneous Foods and Beverages 38,645 0 38,645 99.9
17 449 Airport Deicing 38,126 0 38,126 99.9
18 440 Ore mining and dressing 35,555  Original DMR load is 35,561 0 35,555 99.9
19 437 Centralized Waste Treatment 27,317 0 27,317 99.9
20 434 Coal mining 24,295 0 24,295 99.9
21 410 Textile mills 21,719 0 21,719 99.9
22 460 Hospital 14,530 0 14,530 99.9
23   Unassigned Waste Facility 11,707 0 11,707 99.9
24 463 Plastics molding and forming 10,993 0 10,993 99.9
25 464 Metal molding and casting (foundries) 7,406 0 7,406 99.9
26 467 Aluminum forming 6,047 0 6,047 99.9
27 411 Cement manufacturing 5,753 0 5,753 99.9
28 439 Pharmaceutical manufacturing 5,706 0 5,706 99.9
29 444 Waste combustors 5,096  Original DMR load is 5,099 0 5,096 99.9
30 409 Sugar processing 3,574 0 3,574 99.9
31 432 Meat and Poultry Products 3,274 0 3,274 99.9
32 435 Oil & Gas Extraction 2,913 0 2,913 99.9
33 424 Ferroalloy manufacturing 2,760 0 2,760 99.9
34 442 Transportation Equipment Cleaning 2,486 0 2,486 99.9
35 468 Copper forming 2,190 0 2,190 99.9
36 406 Grain mills 1,985 0 1,985 99.9
37 428 Rubber Manufacturing 1,673 0 1,673 99.9
38   Printing & Publishing 1,456 0 1,456 99.9
39 408 Canned and preserved seafood processing 849  Original DMR load is 849 0 849 99.9
40 451 Concentrated Aquatic Animal Production 783 0 783 99.9
41 455 Pesticide chemicals 553 0 553 99.9
42   Independent and Stand Alone Labs 527 0 527 99.9
43 405 Dairy products processing 505 0 505 99.9
44 471 Nonferrous metals forming and metal powders 354 0 354 99.9
45 457 Explosives manufacturing 265 0 265 99.9
46 426 Glass manufacturing 193 0 193 99.9
47 407 Canned and preserved fruits and vegetables processing 193 0 193 99.9
48 461 Battery manufacturing 179 0 179 99.9
49 443 Paving and roofing materials (tars and asphalt) 175 0 175 99.9
50 438 Metal Products and Machinery 91 0 91 99.9
51 454 Gum and wood chemicals manufacturing 67 0 67 99.9
52 469 Electrical and electronic components 65 0 65 99.9
53   Food Service Establishments 22 0 22 99.9
54 417 Soap and detergent manufacturing 13 0 13 99.9
55 412 CAFO 8 0 8 99.9
56 425 Leather tanning and finishing 5 0 5 99.9
57 450 Construction and Development 1 0 1 99.9
58   Tobacco Products 1 0 1 99.9
59 446 Paint formulating 0 0 0 99.9
60 465 Coil coating 0 0 0 100
61   Photo Processing 0 0 0 100
62 458 Carbon black manufacturing 0 0 0 100
63 427 Asbestos manufacturing 0 0 0 100
64 447 Ink formulating 0 0 0 100
65 459 Photographic 0 0 0 100
66   Industrial Laundries 0 0 0 100
67 466 Porcelain Enameling 0 0 0 100
68   Superfund Sites 0 0 0 100
69 413 Electroplating 0 0 0 100
TOTAL 627,828,282 0 627,828,282 100

Download Rankings

Note: Most industrial sectors have national technology-based wastewater regulations, which are called effluent guidelines. You can learn more about the effluent guidelines regulations controlling industrial wastewater pollution. Industrial sectors that do not currently have effluent guidelines regulations are listed without a Code of Federal Regulation (CFR) part number.

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