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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 635,445,711 0 635,445,711 79.2
2   Unassigned Waste Facility 150,332,509 0 150,332,509 97.9
3 420 Iron and steel manufacturing 10,386,922 0 10,386,922 99.2
4 423 Steam electric power generating 1,224,781 0 1,224,781 99.4
5 430 Pulp, paper and paperboard 974,879 0 974,879 99.5
6 464 Metal molding and casting (foundries) 948,470  Original DMR load is 948,446 0 948,470 99.6
7 414.1 CCH 753,066 0 753,066 99.7
8 429 Timber products processing 667,263 0 667,263 99.8
9 414 Organic chemicals, plastics and synthetic fibers 365,362 0 365,362 99.8
10 419 Petroleum refining 324,793  Original DMR load is 324,747 0 324,793 99.9
11 435 Oil & Gas Extraction 130,177 0 130,177 99.9
12 415 Inorganic chemicals manufacturing 89,164 0 89,164 99.9
13 418 Fertilizer manufacturing 60,812 0 60,812 99.9
14 421 Nonferrous metals manufacturing 56,034 0 56,034 99.9
15 433 Metal Finishing 54,316 0 54,316 99.9
16   Drinking Water Treatment 50,666  Original DMR load is 50,666 0 50,666 99.9
17 436 Mineral Mining and Processing 44,231 0 44,231 99.9
18 449 Airport Deicing 30,520 0 30,520 99.9
19 440 Ore mining and dressing 27,548  Original DMR load is 27,549 0 27,548 99.9
20 463 Plastics molding and forming 10,704 0 10,704 99.9
21 437 Centralized Waste Treatment 9,821 0 9,821 99.9
22   Miscellaneous Foods and Beverages 5,870 0 5,870 99.9
23 439 Pharmaceutical manufacturing 5,211 0 5,211 99.9
24 434 Coal mining 4,159 0 4,159 99.9
25 467 Aluminum forming 3,836 0 3,836 99.9
26 422 Phosphate manufacturing 3,483 0 3,483 99.9
27 409 Sugar processing 3,030 0 3,030 99.9
28 432 Meat and Poultry Products 2,652 0 2,652 99.9
29 428 Rubber Manufacturing 2,280  Original DMR load is 2,284 0 2,280 99.9
30 411 Cement manufacturing 1,992 0 1,992 99.9
31 424 Ferroalloy manufacturing 1,575 0 1,575 99.9
32 468 Copper forming 761 0 761 99.9
33 405 Dairy products processing 469 0 469 99.9
34 438 Metal Products and Machinery 459 0 459 99.9
35 408 Canned and preserved seafood processing 403  Original DMR load is 123 0 403 99.9
36 460 Hospital 395  Original DMR load is 338 0 395 99.9
37 455 Pesticide chemicals 385 0 385 99.9
38 443 Paving and roofing materials (tars and asphalt) 365 0 365 99.9
39 451 Concentrated Aquatic Animal Production 329 0 329 99.9
40 471 Nonferrous metals forming and metal powders 226 0 226 99.9
41 410 Textile mills 188 0 188 99.9
42   Independent and Stand Alone Labs 95 0 95 99.9
43 454 Gum and wood chemicals manufacturing 93 0 93 99.9
44 442 Transportation Equipment Cleaning 86 0 86 99.9
45 426 Glass manufacturing 64 0 64 99.9
46 407 Canned and preserved fruits and vegetables processing 43 0 43 99.9
47 444 Waste combustors 21  Original DMR load is 21 0 21 99.9
48 457 Explosives manufacturing 6 0 6 99.9
49 425 Leather tanning and finishing 5 0 5 99.9
50 406 Grain mills 4 0 4 99.9
51   Printing & Publishing 3 0 3 99.9
52 450 Construction and Development 2 0 2 99.9
53 458 Carbon black manufacturing 0 0 0 99.9
54   Food Service Establishments 0 0 0 99.9
55 447 Ink formulating 0 0 0 100
56   Photo Processing 0 0 0 100
57 461 Battery manufacturing 0 0 0 100
58 417 Soap and detergent manufacturing 0 0 0 100
59 427 Asbestos manufacturing 0 0 0 100
60 412 CAFO 0 0 0 100
61 459 Photographic 0 0 0 100
62 465 Coil coating 0 0 0 100
63   Industrial Laundries 0 0 0 100
64 446 Paint formulating 0 0 0 100
65 466 Porcelain Enameling 0 0 0 100
66   Superfund Sites 0 0 0 100
67 413 Electroplating 0 0 0 100
68 469 Electrical and electronic components 0 0 0 100
69   Tobacco Products 0 0 0 100
TOTAL 802,026,236 0 802,026,236 100

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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