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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.

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)
1 414 Organic chemicals, plastics and synthetic fibers 14 0 14 96.003
2 428 Rubber manufacturing 1 0 1 99.4
3 455 Pesticide chemicals 0 0 0 99.8
4 423 Steam electric power generating 0 0 0 99.9
5 432 Meat and poultry products 0 0 0 99.9
6 438 Metal products and machinery 0 0 0 100
7 457 Explosives manufacturing 0 0 0 100
8 471 Nonferrous metals forming and metal powders 0 0 0 100
9   Food service establishments 0 0 0 100
10 434 Coal mining 0 0 0 100
11 450 Construction and development 0 0 0 100
12 426 Glass manufacturing 0 0 0 100
13 424 Ferroalloy manufacturing 0 0 0 100
14 437 Centralized waste treatment 0 0 0 100
15 464 Metal molding and casting (foundries) 0 0 0 100
16   Independent and stand alone labs 0 0 0 100
17 468 Copper forming 0 0 0 100
18 430 Pulp, paper and paperboard 0 0 0 100
19 412 CAFO 0 0 0 100
20 466 Porcelain enameling 0 0 0 100
21 406 Grain mills 0 0 0 100
22   Superfund sites 0 0 0 100
23 419 Petroleum refining 0 0 0 100
24 439 Pharmaceutical manufacturing 0 0 0 100
25 414.2 Cellulose products manufacturing 0 0 0 100
26 458 Carbon black manufacturing 0 0 0 100
27 445 Landfills 0 0 0 100
28 425 Leather tanning and finishing 0 0 0 100
29 413 Electroplating 0 0 0 100
30 415 Inorganic chemicals manufacturing 0 0 0 100
31 459 Photographic 0 0 0 100
32 427 Asbestos manufacturing 0 0 0 100
33 421 Nonferrous metals manufacturing 0 0 0 100
34 435 Oil and gas extraction 0 0 0 100
35 414.1 CCH 0 0 0 100
36 420 Iron and steel manufacturing 0 0 0 100
37   Drinking water treatment 0 0 0 100
38 454 Gum and wood chemicals manufacturing 0 0 0 100
39 405 Dairy products processing 0 0 0 100
40 436 Mineral mining and processing 0 0 0 100
41 460 Hospital 0 0 0 100
42 417 Soap and detergent manufacturing 0 0 0 100
43 451 Concentrated aquatic animal production 0 0 0 100
44 449 Airport deicing 0 0 0 100
45 407 Canned and preserved fruits and vegetables processing 0 0 0 100
46 447 Ink formulating 0 0 0 100
47 433 Metal finishing 0 0 0 100
48 410 Textile mills 0 0 0 100
49 469 Electrical and electronic components 0 0 0 100
50 408 Canned and preserved seafood processing 0 0 0 100
51 442 Transportation equipment cleaning 0 0 0 100
52 422 Phosphate manufacturing 0 0 0 100
53   Tobacco products 0 0 0 100
54 429 Timber products processing 0 0 0 100
55   Photo processing 0 0 0 100
56 444 Waste combustors 0 0 0 100
57   Printing and publishing 0 0 0 100
58 409 Sugar processing 0 0 0 100
59   Miscellaneous foods and beverages 0 0 0 100
60 467 Aluminum forming 0 0 0 100
61 463 Plastics molding and forming 0 0 0 100
62 461 Battery manufacturing 0 0 0 100
63 446 Paint formulating 0 0 0 100
64 440 Ore mining and dressing 0 0 0 100
65 411 Cement manufacturing 0 0 0 100
66   Unassigned waste facility 0 0 0 100
67 418 Fertilizer manufacturing 0 0 0 100
68 465 Coil coating 0 0 0 100
69   Industrial laundries 0 0 0 100
70 443 Paving and roofing materials (tars and asphalt) 0 0 0 100
TOTAL 15 0 15 100

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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