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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.

2016 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 44,554,862  Original DMR load is 44,554,822 0 44,554,862 85.7
2 414 Organic chemicals, plastics and synthetic fibers 1,805,053 0 1,805,053 89.1
3 423 Steam electric power generating 1,512,810 0 1,512,810 92.1
4 420 Iron and steel manufacturing 1,056,524 0 1,056,524 94.1
5 463 Plastics molding and forming 517,663 0 517,663 95.1
6 432 Meat and Poultry Products 419,817  Original DMR load is 419,817 0 419,817 95.9
7 430 Pulp, paper and paperboard 205,650 0 205,650 96.3
8 418 Fertilizer manufacturing 191,024 0 191,024 96.7
9   Superfund Sites 180,252 0 180,252 97.04
10 419 Petroleum refining 178,602  Original DMR load is 178,602 0 178,602 97.3
11 414.1 CCH 178,027 0 178,027 97.7
12 434 Coal mining 142,500 0 142,500 98.009
13 410 Textile mills 125,316 0 125,316 98.2
14 433 Metal Finishing 111,674 0 111,674 98.4
15 442 Transportation Equipment Cleaning 107,165 0 107,165 98.6
16 435 Oil & Gas Extraction 106,433 0 106,433 98.8
17 421 Nonferrous metals manufacturing 90,594 0 90,594 99.05
18 440 Ore mining and dressing 89,360  Original DMR load is 89,353 0 89,360 99.2
19 436 Mineral Mining and Processing 79,047 0 79,047 99.3
20 415 Inorganic chemicals manufacturing 74,564 0 74,564 99.5
21   Miscellaneous Foods and Beverages 66,468 0 66,468 99.6
22   Unassigned Waste Facility 29,534 0 29,534 99.7
23 449 Airport Deicing 19,093  Original DMR load is 19,093 0 19,093 99.7
24 429 Timber products processing 17,442 0 17,442 99.7
25 422 Phosphate manufacturing 15,482 0 15,482 99.8
26 455 Pesticide chemicals 14,137 0 14,137 99.8
27 454 Gum and wood chemicals manufacturing 13,914 0 13,914 99.8
28 445 Landfills 13,128 0 13,128 99.8
29 460 Hospital 9,167 0 9,167 99.9
30 444 Waste combustors 8,352  Original DMR load is 8,353 0 8,352 99.9
31 437 Centralized Waste Treatment 5,473 0 5,473 99.9
32 406 Grain mills 4,833 0 4,833 99.9
33 439 Pharmaceutical manufacturing 4,768 0 4,768 99.9
34 471 Nonferrous metals forming and metal powders 4,125 0 4,125 99.9
35 464 Metal molding and casting (foundries) 2,927 0 2,927 99.9
36 414.2 Cellulose products manufacturing 2,761 0 2,761 99.9
37 409 Sugar processing 2,704 0 2,704 99.9
38 424 Ferroalloy manufacturing 2,143 0 2,143 99.9
39 411 Cement manufacturing 2,101 0 2,101 99.9
40 428 Rubber Manufacturing 1,953  Original DMR load is 1,959 0 1,953 99.9
41 408 Canned and preserved seafood processing 1,300 0 1,300 99.9
42 467 Aluminum forming 1,180 0 1,180 99.9
43 407 Canned and preserved fruits and vegetables processing 1,103 0 1,103 99.9
44 405 Dairy products processing 1,058 0 1,058 99.9
45 468 Copper forming 1,055 0 1,055 99.9
46   Printing & Publishing 1,024 0 1,024 99.9
47 451 Concentrated Aquatic Animal Production 971 0 971 99.9
48 417 Soap and detergent manufacturing 609 0 609 99.9
49 457 Explosives manufacturing 530 0 530 99.9
50   Independent and Stand Alone Labs 263 0 263 99.9
51 461 Battery manufacturing 184 0 184 99.9
52 426 Glass manufacturing 140 0 140 99.9
53 412 CAFO 73  Original DMR load is 71 0 73 99.9
54 438 Metal Products and Machinery 72 0 72 99.9
55 450 Construction and Development 68 0 68 99.9
56 425 Leather tanning and finishing 43 0 43 99.9
57 469 Electrical and electronic components 27 0 27 99.9
58 443 Paving and roofing materials (tars and asphalt) 27 0 27 99.9
59   Food Service Establishments 19 0 19 99.9
60 446 Paint formulating 12 0 12 99.9
61 458 Carbon black manufacturing 7 0 7 99.9
62 465 Coil coating 2 0 2 99.9
63   Tobacco Products 0 0 0 99.9
64 427 Asbestos manufacturing 0 0 0 99.9
65 459 Photographic 0 0 0 99.9
66   Photo Processing 0 0 0 99.9
67 447 Ink formulating 0 0 0 100
68 466 Porcelain Enameling 0 0 0 100
69   Industrial Laundries 0 0 0 100
70 413 Electroplating 0 0 0 100
TOTAL 51,977,211 0 51,977,211 100

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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