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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 123,514,850  Original DMR load is 123,514,715 0 123,514,850 76.8
2 430 Pulp, paper and paperboard 22,426,587 0 22,426,587 90.7
3 420 Iron and steel manufacturing 4,354,117 0 4,354,117 93.4
4 423 Steam electric power generating 4,266,080  Original DMR load is 4,266,083 0 4,266,080 96.1
5 414 Organic chemicals, plastics and synthetic fibers 2,079,858 0 2,079,858 97.4
6 432 Meat and Poultry Products 637,397  Original DMR load is 637,397 0 637,397 97.8
7 463 Plastics molding and forming 437,640 0 437,640 98.08
8 418 Fertilizer manufacturing 314,504 0 314,504 98.2
9 414.1 CCH 296,752 0 296,752 98.4
10 419 Petroleum refining 278,590  Original DMR load is 278,590 0 278,590 98.6
11 421 Nonferrous metals manufacturing 234,569 0 234,569 98.7
12 434 Coal mining 227,786 0 227,786 98.9
13 435 Oil & Gas Extraction 226,447 0 226,447 99.06
14 433 Metal Finishing 221,985  Original DMR load is 221,985 0 221,985 99.2
15   Superfund Sites 213,944 0 213,944 99.3
16 410 Textile mills 132,270 0 132,270 99.4
17 440 Ore mining and dressing 119,433  Original DMR load is 118,735 0 119,433 99.4
18 442 Transportation Equipment Cleaning 111,509 0 111,509 99.5
19 415 Inorganic chemicals manufacturing 111,381 0 111,381 99.6
20 436 Mineral Mining and Processing 106,276 0 106,276 99.6
21   Miscellaneous Foods and Beverages 88,145 0 88,145 99.7
22 445 Landfills 81,105 0 81,105 99.8
23 454 Gum and wood chemicals manufacturing 65,268 0 65,268 99.8
24   Unassigned Waste Facility 41,889 0 41,889 99.8
25 429 Timber products processing 31,173 0 31,173 99.8
26 449 Airport Deicing 30,533  Original DMR load is 30,533 0 30,533 99.9
27 422 Phosphate manufacturing 27,568 0 27,568 99.9
28 444 Waste combustors 14,489  Original DMR load is 14,469 0 14,489 99.9
29 455 Pesticide chemicals 12,619 0 12,619 99.9
30 438 Metal Products and Machinery 10,662  Original DMR load is 10,662 0 10,662 99.9
31 406 Grain mills 7,773 0 7,773 99.9
32 460 Hospital 7,055 0 7,055 99.9
33 437 Centralized Waste Treatment 7,021 0 7,021 99.9
34 439 Pharmaceutical manufacturing 6,479 0 6,479 99.9
35 464 Metal molding and casting (foundries) 4,572  Original DMR load is 4,572 0 4,572 99.9
36 471 Nonferrous metals forming and metal powders 4,484 0 4,484 99.9
37 414.2 Cellulose products manufacturing 4,446 0 4,446 99.9
38 450 Construction and Development 3,908 0 3,908 99.9
39 409 Sugar processing 3,750  Original DMR load is 3,694 0 3,750 99.9
40 424 Ferroalloy manufacturing 3,326 0 3,326 99.9
41 411 Cement manufacturing 3,133 0 3,133 99.9
42 428 Rubber Manufacturing 2,957  Original DMR load is 2,963 0 2,957 99.9
43 467 Aluminum forming 2,901 0 2,901 99.9
44 407 Canned and preserved fruits and vegetables processing 2,770 0 2,770 99.9
45 426 Glass manufacturing 2,327 0 2,327 99.9
46 451 Concentrated Aquatic Animal Production 2,206  Original DMR load is 2,206 0 2,206 99.9
47 408 Canned and preserved seafood processing 2,054  Original DMR load is 2,054 0 2,054 99.9
48 468 Copper forming 1,866 0 1,866 99.9
49   Printing & Publishing 1,582 0 1,582 99.9
50 405 Dairy products processing 1,543 0 1,543 99.9
51 417 Soap and detergent manufacturing 916 0 916 99.9
52 457 Explosives manufacturing 848 0 848 99.9
53   Independent and Stand Alone Labs 533 0 533 99.9
54 461 Battery manufacturing 246 0 246 99.9
55 425 Leather tanning and finishing 155 0 155 99.9
56 412 CAFO 90  Original DMR load is 90 0 90 99.9
57 443 Paving and roofing materials (tars and asphalt) 80 0 80 99.9
58 469 Electrical and electronic components 41 0 41 99.9
59   Food Service Establishments 40 0 40 99.9
60 446 Paint formulating 13 0 13 99.9
61 458 Carbon black manufacturing 6 0 6 99.9
62 465 Coil coating 3 0 3 99.9
63 427 Asbestos manufacturing 0 0 0 99.9
64   Tobacco Products 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
69 413 Electroplating 0 0 0 100
70   Industrial Laundries 0 0 0 100
TOTAL 160,794,549 0 160,794,549 100

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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