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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 1,091,421 0 1,091,421 35.8
2 423 Steam electric power generating 488,284  Original DMR load is 488,288 0 488,284 51.8
3 414.1 CCH 469,401 0 469,401 67.2
4   Unassigned Waste Facility 162,598 0 162,598 72.5
5 418 Fertilizer manufacturing 147,602 0 147,602 77.4
6 419 Petroleum refining 114,511 0 114,511 81.1
7   Drinking Water Treatment 104,843  Original DMR load is 104,414 0 104,843 84.5
8 414 Organic chemicals, plastics and synthetic fibers 71,664 0 71,664 86.9
9 415 Inorganic chemicals manufacturing 49,565 0 49,565 88.5
10   Miscellaneous Foods and Beverages 42,055 0 42,055 89.9
11 421 Nonferrous metals manufacturing 37,142 0 37,142 91.1
12 414.2 Cellulose products manufacturing 31,811 0 31,811 92.2
13   Superfund Sites 30,801 0 30,801 93.2
14 437 Centralized Waste Treatment 27,947 0 27,947 94.1
15 430 Pulp, paper and paperboard 25,802 0 25,802 94.9
16 455 Pesticide chemicals 25,266 0 25,266 95.8
17 436 Mineral Mining and Processing 19,879 0 19,879 96.4
18 433 Metal Finishing 17,489 0 17,489 97.04
19 440 Ore mining and dressing 13,059 0 13,059 97.4
20 432 Meat and Poultry Products 12,015 0 12,015 97.8
21 445 Landfills 11,480 0 11,480 98.2
22 434 Coal mining 11,198 0 11,198 98.6
23 410 Textile mills 10,693 0 10,693 98.9
24 449 Airport Deicing 8,411 0 8,411 99.2
25 444 Waste combustors 3,803  Original DMR load is 3,803 0 3,803 99.3
26 422 Phosphate manufacturing 2,951 0 2,951 99.4
27 409 Sugar processing 2,802 0 2,802 99.5
28 435 Oil & Gas Extraction 2,015 0 2,015 99.6
29 439 Pharmaceutical manufacturing 1,989 0 1,989 99.6
30 468 Copper forming 1,432 0 1,432 99.7
31 406 Grain mills 1,305 0 1,305 99.7
32 428 Rubber Manufacturing 1,288  Original DMR load is 1,288 0 1,288 99.8
33 411 Cement manufacturing 951 0 951 99.8
34 463 Plastics molding and forming 866 0 866 99.8
35   Printing & Publishing 780 0 780 99.8
36 408 Canned and preserved seafood processing 541 0 541 99.9
37 405 Dairy products processing 429 0 429 99.9
38 471 Nonferrous metals forming and metal powders 424 0 424 99.9
39 451 Concentrated Aquatic Animal Production 295 0 295 99.9
40 464 Metal molding and casting (foundries) 219 0 219 99.9
41   Independent and Stand Alone Labs 215 0 215 99.9
42 442 Transportation Equipment Cleaning 143 0 143 99.9
43 429 Timber products processing 138 0 138 99.9
44 460 Hospital 106 0 106 99.9
45 457 Explosives manufacturing 103 0 103 99.9
46 467 Aluminum forming 98 0 98 99.9
47 424 Ferroalloy manufacturing 77 0 77 99.9
48 407 Canned and preserved fruits and vegetables processing 65 0 65 99.9
49 469 Electrical and electronic components 49 0 49 99.9
50 417 Soap and detergent manufacturing 47 0 47 99.9
51 454 Gum and wood chemicals manufacturing 31 0 31 99.9
52 438 Metal Products and Machinery 28 0 28 99.9
53 426 Glass manufacturing 16 0 16 99.9
54   Food Service Establishments 13 0 13 99.9
55 443 Paving and roofing materials (tars and asphalt) 13 0 13 99.9
56 461 Battery manufacturing 9 0 9 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
60 427 Asbestos manufacturing 0 0 0 99.9
61 425 Leather tanning and finishing 0 0 0 100
62 413 Electroplating 0 0 0 100
63 458 Carbon black manufacturing 0 0 0 100
64 459 Photographic 0 0 0 100
65 447 Ink formulating 0 0 0 100
66   Tobacco Products 0 0 0 100
67 466 Porcelain Enameling 0 0 0 100
68   Industrial Laundries 0 0 0 100
69   Photo Processing 0 0 0 100
70 412 CAFO 0 0 0 100
TOTAL 3,048,186 0 3,048,186 100

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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