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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 50,133,089  Original DMR load is 50,132,824 0 50,133,089 84.5
2 423 Steam electric power generating 2,155,096 0 2,155,096 88.2
3 414 Organic chemicals, plastics and synthetic fibers 2,061,976 0 2,061,976 91.7
4 420 Iron and steel manufacturing 1,585,928 0 1,585,928 94.3
5 432 Meat and Poultry Products 468,181  Original DMR load is 468,181 0 468,181 95.1
6 463 Plastics molding and forming 328,775 0 328,775 95.7
7 430 Pulp, paper and paperboard 262,568 0 262,568 96.1
8 418 Fertilizer manufacturing 214,818 0 214,818 96.5
9 419 Petroleum refining 213,908  Original DMR load is 213,908 0 213,908 96.8
10 434 Coal mining 206,469 0 206,469 97.2
11   Superfund Sites 202,771 0 202,771 97.5
12 414.1 CCH 201,462 0 201,462 97.9
13 421 Nonferrous metals manufacturing 169,712 0 169,712 98.2
14 410 Textile mills 139,972 0 139,972 98.4
15 433 Metal Finishing 129,345 0 129,345 98.6
16 442 Transportation Equipment Cleaning 122,922 0 122,922 98.8
17 435 Oil & Gas Extraction 119,497 0 119,497 99.07
18 440 Ore mining and dressing 95,839  Original DMR load is 95,825 0 95,839 99.2
19 415 Inorganic chemicals manufacturing 87,109 0 87,109 99.3
20 436 Mineral Mining and Processing 84,217 0 84,217 99.5
21   Miscellaneous Foods and Beverages 73,767 0 73,767 99.6
22   Unassigned Waste Facility 31,886 0 31,886 99.6
23 429 Timber products processing 26,215 0 26,215 99.7
24 449 Airport Deicing 20,166  Original DMR load is 20,166 0 20,166 99.7
25 422 Phosphate manufacturing 17,348 0 17,348 99.8
26 454 Gum and wood chemicals manufacturing 15,656 0 15,656 99.8
27 445 Landfills 15,060 0 15,060 99.8
28 455 Pesticide chemicals 13,823 0 13,823 99.8
29 444 Waste combustors 9,744  Original DMR load is 9,742 0 9,744 99.8
30 438 Metal Products and Machinery 7,959 0 7,959 99.9
31 406 Grain mills 5,991 0 5,991 99.9
32 437 Centralized Waste Treatment 5,654 0 5,654 99.9
33 439 Pharmaceutical manufacturing 5,258 0 5,258 99.9
34 471 Nonferrous metals forming and metal powders 4,495 0 4,495 99.9
35 464 Metal molding and casting (foundries) 3,296 0 3,296 99.9
36 414.2 Cellulose products manufacturing 3,097 0 3,097 99.9
37 409 Sugar processing 2,987 0 2,987 99.9
38 424 Ferroalloy manufacturing 2,501 0 2,501 99.9
39 411 Cement manufacturing 2,408 0 2,408 99.9
40 428 Rubber Manufacturing 2,254  Original DMR load is 2,199 0 2,254 99.9
41 426 Glass manufacturing 2,148 0 2,148 99.9
42 467 Aluminum forming 1,376 0 1,376 99.9
43 408 Canned and preserved seafood processing 1,352 0 1,352 99.9
44 451 Concentrated Aquatic Animal Production 1,272  Original DMR load is 1,272 0 1,272 99.9
45 407 Canned and preserved fruits and vegetables processing 1,238 0 1,238 99.9
46   Printing & Publishing 1,201 0 1,201 99.9
47 468 Copper forming 1,197 0 1,197 99.9
48 405 Dairy products processing 1,187 0 1,187 99.9
49 460 Hospital 994 0 994 99.9
50 417 Soap and detergent manufacturing 693 0 693 99.9
51 457 Explosives manufacturing 547 0 547 99.9
52   Independent and Stand Alone Labs 309 0 309 99.9
53 461 Battery manufacturing 197 0 197 99.9
54 450 Construction and Development 169 0 169 99.9
55 412 CAFO 71  Original DMR load is 71 0 71 99.9
56 425 Leather tanning and finishing 49 0 49 99.9
57 443 Paving and roofing materials (tars and asphalt) 45 0 45 99.9
58 469 Electrical and electronic components 31 0 31 99.9
59   Food Service Establishments 29 0 29 99.9
60 446 Paint formulating 12 0 12 99.9
61 458 Carbon black manufacturing 9 0 9 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 59,267,347 0 59,267,347 100

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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