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Discharge Monitoring Report (DMR) Pollutant Loading Tool

The Loading Tool is being transitioned into ECHO to increase user access to data and streamline site maintenance. The beta version is now available for testing. EPA plans to retire this site in late November 2017. Current site functionality will be available in ECHO.

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)
1 435 Oil and gas extraction 629,684,738  Original DMR load is 629,152,671 0 629,684,738 90.5
2   Drinking water treatment 52,159,792  Original DMR load is 52,159,738 0 52,159,792 98.07
3 423 Steam electric power generating 4,282,095  Original DMR load is 4,264,309 0 4,282,095 98.6
4 420 Iron and steel manufacturing 3,103,888 0 3,103,888 99.1
5 430 Pulp, paper and paperboard 1,939,149 0 1,939,149 99.4
6 418 Fertilizer manufacturing 467,680 0 467,680 99.4
7 414 Organic chemicals, plastics and synthetic fibers 415,661 0 415,661 99.5
8 421 Nonferrous metals manufacturing 312,596 0 312,596 99.5
9   Miscellaneous foods and beverages 299,831 0 299,831 99.6
10 414.1 CCH 266,956 0 266,956 99.6
11   Superfund sites 266,373 0 266,373 99.7
12 419 Petroleum refining 240,320  Original DMR load is 240,320 0 240,320 99.7
13 407 Canned and preserved fruits and vegetables processing 231,585 0 231,585 99.7
14 433 Metal finishing 203,019  Original DMR load is 203,004 0 203,019 99.8
15 440 Ore mining and dressing 195,718  Original DMR load is 195,738 0 195,718 99.8
16 415 Inorganic chemicals manufacturing 187,778 0 187,778 99.8
17 434 Coal mining 177,744  Original DMR load is 177,692 0 177,744 99.8
18 436 Mineral mining and processing 168,754 0 168,754 99.9
19   Unassigned waste facility 107,887 0 107,887 99.9
20 410 Textile mills 79,906 0 79,906 99.9
21 429 Timber products processing 78,645 0 78,645 99.9
22 432 Meat and poultry products 73,136 0 73,136 99.9
23 442 Transportation equipment cleaning 65,739 0 65,739 99.9
24 451 Concentrated aquatic animal production 44,964  Original DMR load is 44,964 0 44,964 99.9
25 460 Hospital 24,268 0 24,268 99.9
26 422 Phosphate manufacturing 19,559 0 19,559 99.9
27 445 Landfills 18,458 0 18,458 99.9
28 428 Rubber manufacturing 14,328  Original DMR load is 14,349 0 14,328 99.9
29 455 Pesticide chemicals 13,636 0 13,636 99.9
30 414.2 Cellulose products manufacturing 13,063 0 13,063 99.9
31 449 Airport deicing 9,855 0 9,855 99.9
32 446 Paint formulating 8,337 0 8,337 99.9
33 406 Grain mills 7,782 0 7,782 99.9
34 444 Waste combustors 6,400  Original DMR load is 6,400 0 6,400 99.9
35 409 Sugar processing 6,149  Original DMR load is 6,161 0 6,149 99.9
36 437 Centralized waste treatment 5,104 0 5,104 99.9
37 464 Metal molding and casting (foundries) 4,165 0 4,165 99.9
38 467 Aluminum forming 4,018 0 4,018 99.9
39 439 Pharmaceutical manufacturing 3,854 0 3,854 99.9
40 471 Nonferrous metals forming and metal powders 2,626 0 2,626 99.9
41 457 Explosives manufacturing 2,388 0 2,388 99.9
42 463 Plastics molding and forming 2,173 0 2,173 99.9
43 424 Ferroalloy manufacturing 1,818 0 1,818 99.9
44 411 Cement manufacturing 1,767 0 1,767 99.9
45 408 Canned and preserved seafood processing 1,515  Original DMR load is 1,509 0 1,515 99.9
46 405 Dairy products processing 1,499 0 1,499 99.9
47 417 Soap and detergent manufacturing 805 0 805 99.9
48   Independent and stand alone labs 742 0 742 99.9
49   Food service establishments 725 0 725 99.9
50 450 Construction and development 411 0 411 99.9
51 468 Copper forming 394 0 394 99.9
52 426 Glass manufacturing 383 0 383 99.9
53 461 Battery manufacturing 160 0 160 99.9
54 425 Leather tanning and finishing 103 0 103 99.9
55 443 Paving and roofing materials (tars and asphalt) 59 0 59 99.9
56 469 Electrical and electronic components 59 0 59 99.9
57 454 Gum and wood chemicals manufacturing 39 0 39 99.9
58   Printing and publishing 30 0 30 99.9
59 438 Metal products and machinery 28  Original DMR load is 26 0 28 99.9
60 412 CAFO 11 0 11 99.9
61 465 Coil coating 4 0 4 99.9
62 427 Asbestos manufacturing 2 0 2 99.9
63 458 Carbon black manufacturing 0 0 0 99.9
64 447 Ink formulating 0 0 0 99.9
65 459 Photographic 0 0 0 99.9
66   Photo processing 0 0 0 100
67   Industrial laundries 0 0 0 100
68 466 Porcelain enameling 0 0 0 100
69   Tobacco products 0 0 0 100
70 413 Electroplating 0 0 0 100
TOTAL 695,230,673 0 695,230,673 100

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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