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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 more information on the types of errors identified, see EPA's Technical Support Document for the 2010 Effluent Guidelines Program (PDF) (255 pp, 3.4MB). Because of this review, and EPA's methodology for interpreting data and calculating loads (explained in EPA's Technical Support Document for the Annual Review of Existing Effluent Guidelines and Identification of Potential New Point Source Categories), the calculated loads and category rankings may differ using DMR and TRI data that has not been updated. Data that have been updated by EPA's annual reviews are flagged by green flags designating that a change has been made to a concentration, quantity, or flow value. View a listing of the changes for the most recent annual review (PDF) (1 p, 7K).

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.

2011 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)
1 423 Steam electric power generating 15,852,333  Original DMR load is 15,852,487 442,401 16,294,734 50.3
2 414.1 CCH 747,438 2,431,676 3,179,113 60.1
3 414 Organic chemicals, plastics and synthetic fibers 1,539,971  Original DMR load is 1,539,978 147,675  Original TRI load is 274,345 1,687,647 65.3
4 430 Pulp, paper and paperboard 1,018,486 651,377  Original TRI load is 906,350 1,669,863 70.5
5 419 Petroleum refining 751,581 680,608  Original TRI load is 731,047 1,432,189 74.9
6   Drinking Water Treatment 1,389,247  Original DMR load is 45,288,488 0 1,389,247 79.2
7 440 Ore mining and dressing 109,758  Original DMR load is 46,237,789 1,229,923 1,339,681 83.3
8 420 Iron and steel manufacturing 1,170,744 82,937  Original TRI load is 107,428 1,253,681 87.2
9 415 Inorganic chemicals manufacturing 219,287  Original DMR load is 2,037,455 326,863 546,150 88.9
10 418 Fertilizer manufacturing 538,032 6,668 544,700 90.6
11 455 Pesticide chemicals 24,607 373,900 398,507 91.8
12 409 Sugar processing 373,179 430 373,609 92.9
13 421 Nonferrous metals manufacturing 326,096 42,948 369,044 94.1
14 433 Metal Finishing 264,974 51,739 316,713 95.1
15 451 Concentrated Aquatic Animal Production 291,885 0 291,885 96.005
16 434 Coal mining 188,756 564 189,320 96.5
17 432 Meat and Poultry Products 119,024 39,118 158,142 97.07
18 429 Timber products processing 99,618 32,333  Original TRI load is 92,043 131,951 97.4
19 435 Oil & Gas Extraction 106,090 0 106,090 97.8
20 463 Plastics molding and forming 26,694 69,162 95,856 98.1
21 449 Airport Deicing 77,544 0 77,544 98.3
22 445 Landfills 19,312  Original DMR load is 21,010,509 42,851 62,162 98.5
23   Miscellaneous Foods and Beverages 57,365 0 57,365 98.7
24 417 Soap and detergent manufacturing 47,124 2,368 49,492 98.8
25 424 Ferroalloy manufacturing 27,202  Original DMR load is 34,345 8,991 36,193 98.9
26 436 Mineral Mining and Processing 31,156 2,946 34,103 99.08
27 458 Carbon black manufacturing 0 27,865  Original TRI load is 52,827 27,866 99.1
28 464 Metal molding and casting (foundries) 16,283 9,672 25,955 99.2
29 410 Textile mills 22,343 1,074 23,417 99.3
30 471 Nonferrous metals forming and metal powders 3,439 17,883 21,322 99.3
31 428 Rubber Manufacturing 7,322 10,197 17,520 99.4
32 422 Phosphate manufacturing 14,830 193 15,023 99.4
33 406 Grain mills 2,808 10,517 13,325 99.5
34 454 Gum and wood chemicals manufacturing 12,419 34 12,453 99.5
35 438 Metal Products and Machinery 4,155 7,952 12,107 99.6
36 457 Explosives manufacturing 11,829 17 11,847 99.6
37 469 Electrical and electronic components 8,179 3,576 11,755 99.6
38 437 Centralized Waste Treatment 7,864 2,354 10,218 99.7
39   Unassigned Waste Facility 9,421  Original DMR load is 160,904 715 10,136 99.7
40 450 Construction and Development 9,635 0 9,635 99.7
41 460 Hospital 9,420 0 9,420 99.8
42 468 Copper forming 2,613 6,178 8,791 99.8
43 467 Aluminum forming 6,962  Original DMR load is 1,674,270 1,303 8,266 99.8
44 439 Pharmaceutical manufacturing 4,519 2,347 6,866 99.8
45 411 Cement manufacturing 5,965 652 6,617 99.8
46 407 Canned and preserved fruits and vegetables processing 686 4,420 5,107 99.9
47 405 Dairy products processing 593 3,767 4,360 99.9
48 413 Electroplating 0 4,097 4,097 99.9
49 466 Porcelain Enameling 2,734 28 2,762 99.9
50 444 Waste combustors 2,652 88 2,740 99.9
51 425 Leather tanning and finishing 8 1,898 1,906 99.9
52   Printing & Publishing 1,891 0 1,891 99.9
53 426 Glass manufacturing 1,556 246 1,802 99.9
54 442 Transportation Equipment Cleaning 1,698 0 1,698 99.9
55 443 Paving and roofing materials (tars and asphalt) 581 1,063 1,644 99.9
56 461 Battery manufacturing 298 870 1,168 99.9
57 408 Canned and preserved seafood processing 1,064 74 1,138 99.9
58   Independent and Stand Alone Labs 756 0 756 99.9
59 412 CAFO 540 0 540 99.9
60 427 Asbestos manufacturing 518 0 518 99.9
61 465 Coil coating 250 75 325 99.9
62 446 Paint formulating 3 86 90 99.9
63   Food Service Establishments 46 0 46 99.9
64   Industrial Laundries 13 0 13 99.9
65 447 Ink formulating 2 4 6 99.9
66   Photo Processing 0 0 0 99.9
67 459 Photographic 0 0 0 100
68   Superfund Sites 0 0 0 100
69   Tobacco Products 0 0 0 100
TOTAL 25,593,398 6,786,725 32,380,123 100

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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