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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 571,909,567 0 571,909,567 78.6
2   Unassigned Waste Facility 135,305,729 0 135,305,729 97.3
3 420 Iron and steel manufacturing 9,408,319 0 9,408,319 98.6
4 414.1 CCH 2,161,552 0 2,161,552 98.9
5 423 Steam electric power generating 1,415,725  Original DMR load is 1,415,604 0 1,415,725 99.1
6 430 Pulp, paper and paperboard 1,289,327 0 1,289,327 99.2
7 464 Metal molding and casting (foundries) 1,001,706 0 1,001,706 99.4
8   Drinking Water Treatment 635,143  Original DMR load is 634,508 0 635,143 99.5
9 429 Timber products processing 600,677 0 600,677 99.5
10 451 Concentrated Aquatic Animal Production 530,768 0 530,768 99.6
11 419 Petroleum refining 449,076  Original DMR load is 449,096 0 449,076 99.7
12 414 Organic chemicals, plastics and synthetic fibers 444,382 0 444,382 99.7
13 422 Phosphate manufacturing 364,522 0 364,522 99.8
14 436 Mineral Mining and Processing 359,530 0 359,530 99.8
15 415 Inorganic chemicals manufacturing 194,974 0 194,974 99.9
16 435 Oil & Gas Extraction 120,037 0 120,037 99.9
17 421 Nonferrous metals manufacturing 92,905 0 92,905 99.9
18 433 Metal Finishing 87,241 0 87,241 99.9
19 418 Fertilizer manufacturing 57,139 0 57,139 99.9
20   Miscellaneous Foods and Beverages 40,199 0 40,199 99.9
21 440 Ore mining and dressing 35,342  Original DMR load is 35,066 0 35,342 99.9
22 434 Coal mining 35,160 0 35,160 99.9
23 449 Airport Deicing 29,640 0 29,640 99.9
24 437 Centralized Waste Treatment 29,316 0 29,316 99.9
25 410 Textile mills 23,903 0 23,903 99.9
26 460 Hospital 11,826 0 11,826 99.9
27 463 Plastics molding and forming 10,678 0 10,678 99.9
28 439 Pharmaceutical manufacturing 10,315 0 10,315 99.9
29 411 Cement manufacturing 6,329 0 6,329 99.9
30 444 Waste combustors 5,366  Original DMR load is 5,369 0 5,366 99.9
31 432 Meat and Poultry Products 4,816 0 4,816 99.9
32 467 Aluminum forming 3,706 0 3,706 99.9
33 455 Pesticide chemicals 3,483 0 3,483 99.9
34 409 Sugar processing 3,180 0 3,180 99.9
35 442 Transportation Equipment Cleaning 2,955 0 2,955 99.9
36 424 Ferroalloy manufacturing 2,708 0 2,708 99.9
37 406 Grain mills 2,462 0 2,462 99.9
38 428 Rubber Manufacturing 2,415  Original DMR load is 2,420 0 2,415 99.9
39 468 Copper forming 2,263 0 2,263 99.9
40 457 Explosives manufacturing 1,794 0 1,794 99.9
41   Printing & Publishing 1,595 0 1,595 99.9
42 408 Canned and preserved seafood processing 1,434  Original DMR load is 1,425 0 1,434 99.9
43   Independent and Stand Alone Labs 850 0 850 99.9
44 405 Dairy products processing 602 0 602 99.9
45 471 Nonferrous metals forming and metal powders 540 0 540 99.9
46 438 Metal Products and Machinery 421 0 421 99.9
47 443 Paving and roofing materials (tars and asphalt) 319 0 319 99.9
48 407 Canned and preserved fruits and vegetables processing 236 0 236 99.9
49 450 Construction and Development 155 0 155 99.9
50 426 Glass manufacturing 145 0 145 99.9
51 461 Battery manufacturing 131 0 131 99.9
52 454 Gum and wood chemicals manufacturing 85 0 85 99.9
53 469 Electrical and electronic components 79 0 79 99.9
54 417 Soap and detergent manufacturing 43 0 43 99.9
55   Food Service Establishments 25 0 25 99.9
56 412 CAFO 7 0 7 99.9
57 425 Leather tanning and finishing 6 0 6 99.9
58   Photo Processing 2 0 2 99.9
59 459 Photographic 2 0 2 99.9
60 446 Paint formulating 0 0 0 99.9
61   Tobacco Products 0 0 0 99.9
62 458 Carbon black manufacturing 0 0 0 99.9
63 465 Coil coating 0 0 0 99.9
64 447 Ink formulating 0 0 0 100
65 413 Electroplating 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
69 427 Asbestos manufacturing 0 0 0 100
TOTAL 726,702,853 0 726,702,853 100

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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