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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 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.

Top Industrial Dischargers of Toxic Pollutants

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

2017 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   Drinking water treatment 30,071,690  Original DMR load is 30,071,492 0 30,071,690 86.9
2 420 Iron and steel manufacturing 1,417,290 0 1,417,290 91.01
3 423 Steam electric power generating 774,593  Original DMR load is 774,587 0 774,593 93.2
4 430 Pulp, paper and paperboard 356,343 0 356,343 94.2
5 418 Fertilizer manufacturing 346,314 0 346,314 95.2
6 407 Canned and preserved fruits and vegetables processing 274,068 0 274,068 96.07
7 414 Organic chemicals, plastics and synthetic fibers 224,612 0 224,612 96.7
8 440 Ore mining and dressing 183,286  Original DMR load is 183,311 0 183,286 97.2
9 414.1 CCH 148,057 0 148,057 97.6
10 419 Petroleum refining 145,051 0 145,051 98.1
11 434 Coal mining 142,894  Original DMR load is 142,643 0 142,894 98.5
12 415 Inorganic chemicals manufacturing 108,456 0 108,456 98.8
13 421 Nonferrous metals manufacturing 86,373 0 86,373 99.08
14 410 Textile mills 72,872 0 72,872 99.2
15 442 Transportation equipment cleaning 50,830 0 50,830 99.4
16 433 Metal finishing 38,818  Original DMR load is 38,816 0 38,818 99.5
17 432 Meat and poultry products 31,376 0 31,376 99.6
18 414.2 Cellulose products manufacturing 16,082 0 16,082 99.6
19 436 Mineral mining and processing 12,370 0 12,370 99.7
20   Miscellaneous foods and beverages 9,876 0 9,876 99.7
21 422 Phosphate manufacturing 8,588 0 8,588 99.7
22 445 Landfills 8,148 0 8,148 99.8
23 405 Dairy products processing 7,330 0 7,330 99.8
24 429 Timber products processing 7,040 0 7,040 99.8
25   Unassigned waste facility 5,952 0 5,952 99.8
26 435 Oil and gas extraction 5,058 0 5,058 99.8
27 409 Sugar processing 4,458  Original DMR load is 4,472 0 4,458 99.8
28 467 Aluminum forming 4,390 0 4,390 99.8
29 444 Waste combustors 4,078  Original DMR load is 4,078 0 4,078 99.9
30 464 Metal molding and casting (foundries) 3,894 0 3,894 99.9
31 437 Centralized waste treatment 3,497 0 3,497 99.9
32 439 Pharmaceutical manufacturing 2,250 0 2,250 99.9
33 457 Explosives manufacturing 2,166 0 2,166 99.9
34 463 Plastics molding and forming 2,020 0 2,020 99.9
35 449 Airport deicing 2,005 0 2,005 99.9
36 424 Ferroalloy manufacturing 1,905 0 1,905 99.9
37 428 Rubber manufacturing 1,890  Original DMR load is 1,899 0 1,890 99.9
38 406 Grain mills 1,887 0 1,887 99.9
39 455 Pesticide chemicals 1,668 0 1,668 99.9
40 471 Nonferrous metals forming and metal powders 1,461 0 1,461 99.9
41   Tobacco products 1,254 0 1,254 99.9
42 451 Concentrated aquatic animal production 1,139 0 1,139 99.9
43 411 Cement manufacturing 1,061 0 1,061 99.9
44 468 Copper forming 728 0 728 99.9
45 450 Construction and development 438 0 438 99.9
46 460 Hospital 339 0 339 99.9
47   Independent and stand alone labs 322 0 322 99.9
48 408 Canned and preserved seafood processing 268 0 268 99.9
49 426 Glass manufacturing 202 0 202 99.9
50 461 Battery manufacturing 103 0 103 99.9
51 469 Electrical and electronic components 57 0 57 99.9
52 417 Soap and detergent manufacturing 37 0 37 99.9
53 446 Paint formulating 35 0 35 99.9
54 425 Leather tanning and finishing 33 0 33 99.9
55 443 Paving and roofing materials (tars and asphalt) 29 0 29 99.9
56 454 Gum and wood chemicals manufacturing 18 0 18 99.9
57   Printing and publishing 18 0 18 99.9
58   Food service establishments 16 0 16 99.9
59 412 CAFO 10 0 10 99.9
60 438 Metal products and machinery 9  Original DMR load is 8 0 9 99.9
61 427 Asbestos manufacturing 2 0 2 99.9
62 465 Coil coating 1 0 1 99.9
63   Superfund sites 0 0 0 99.9
64 458 Carbon black manufacturing 0 0 0 99.9
65   Photo processing 0 0 0 99.9
66 459 Photographic 0 0 0 100
67 466 Porcelain enameling 0 0 0 100
68 413 Electroplating 0 0 0 100
69   Industrial laundries 0 0 0 100
70 447 Ink formulating 0 0 0 100
TOTAL 34,597,056 0 34,597,056 100

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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