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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).

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.

2015 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)
1 420 Iron and steel manufacturing 1,527,556 0 1,527,556 30.1
2 423 Steam electric power generating 806,818  Original DMR load is 806,821 0 806,818 46.01
3 414.1 CCH 657,460 0 657,460 58.9
4 436 Mineral Mining and Processing 505,752 0 505,752 68.9
5 418 Fertilizer manufacturing 234,794 0 234,794 73.5
6   Unassigned Waste Facility 227,598 0 227,598 78.06
7 419 Petroleum refining 175,787  Original DMR load is 175,787 0 175,787 81.5
8 415 Inorganic chemicals manufacturing 157,216 0 157,216 84.6
9   Drinking Water Treatment 152,917  Original DMR load is 150,394 0 152,917 87.6
10 414 Organic chemicals, plastics and synthetic fibers 114,178 0 114,178 89.8
11 433 Metal Finishing 106,205  Original DMR load is 106,205 0 106,205 91.9
12 421 Nonferrous metals manufacturing 59,845 0 59,845 93.1
13   Miscellaneous Foods and Beverages 47,401 0 47,401 94.1
14   Superfund Sites 43,122 0 43,122 94.9
15 430 Pulp, paper and paperboard 39,379 0 39,379 95.7
16 414.2 Cellulose products manufacturing 34,005 0 34,005 96.3
17 437 Centralized Waste Treatment 27,789 0 27,789 96.9
18 455 Pesticide chemicals 21,375 0 21,375 97.3
19 440 Ore mining and dressing 19,379 0 19,379 97.7
20 432 Meat and Poultry Products 17,373 0 17,373 98.09
21 434 Coal mining 16,351 0 16,351 98.4
22 410 Textile mills 15,565 0 15,565 98.7
23 445 Landfills 14,858 0 14,858 99.01
24 417 Soap and detergent manufacturing 8,991 0 8,991 99.1
25 449 Airport Deicing 7,900 0 7,900 99.3
26 422 Phosphate manufacturing 3,761 0 3,761 99.4
27 444 Waste combustors 3,647  Original DMR load is 3,646 0 3,647 99.4
28 409 Sugar processing 3,391 0 3,391 99.5
29 439 Pharmaceutical manufacturing 3,061 0 3,061 99.6
30 435 Oil & Gas Extraction 2,946 0 2,946 99.6
31 406 Grain mills 2,672 0 2,672 99.7
32 428 Rubber Manufacturing 1,730  Original DMR load is 1,730 0 1,730 99.7
33 468 Copper forming 1,724 0 1,724 99.8
34 411 Cement manufacturing 1,562 0 1,562 99.8
35 467 Aluminum forming 1,453 0 1,453 99.8
36 463 Plastics molding and forming 1,217 0 1,217 99.8
37   Printing & Publishing 964 0 964 99.9
38 408 Canned and preserved seafood processing 751 0 751 99.9
39 471 Nonferrous metals forming and metal powders 587 0 587 99.9
40 405 Dairy products processing 535 0 535 99.9
41 451 Concentrated Aquatic Animal Production 482 0 482 99.9
42 454 Gum and wood chemicals manufacturing 406 0 406 99.9
43   Independent and Stand Alone Labs 401 0 401 99.9
44 464 Metal molding and casting (foundries) 330 0 330 99.9
45 429 Timber products processing 285 0 285 99.9
46 460 Hospital 212 0 212 99.9
47 457 Explosives manufacturing 190 0 190 99.9
48 442 Transportation Equipment Cleaning 188 0 188 99.9
49 407 Canned and preserved fruits and vegetables processing 160 0 160 99.9
50 461 Battery manufacturing 129 0 129 99.9
51 424 Ferroalloy manufacturing 109 0 109 99.9
52 469 Electrical and electronic components 65 0 65 99.9
53 438 Metal Products and Machinery 37 0 37 99.9
54 443 Paving and roofing materials (tars and asphalt) 22 0 22 99.9
55   Food Service Establishments 21 0 21 99.9
56 426 Glass manufacturing 19 0 19 99.9
57 465 Coil coating 3 0 3 99.9
58 446 Paint formulating 1 0 1 99.9
59 450 Construction and Development 1 0 1 99.9
60   Tobacco Products 0 0 0 99.9
61 425 Leather tanning and finishing 0 0 0 99.9
62 427 Asbestos manufacturing 0 0 0 100
63 412 CAFO 0 0 0 100
64 459 Photographic 0 0 0 100
65 447 Ink formulating 0 0 0 100
66 466 Porcelain Enameling 0 0 0 100
67   Industrial Laundries 0 0 0 100
68 413 Electroplating 0 0 0 100
69   Photo Processing 0 0 0 100
70 458 Carbon black manufacturing 0 0 0 100
TOTAL 5,072,676 0 5,072,676 100

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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