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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 110,350,811  Original DMR load is 110,350,753 0 110,350,811 90.02
2 423 Steam electric power generating 4,209,832  Original DMR load is 4,209,834 0 4,209,832 93.4
3 420 Iron and steel manufacturing 1,936,939 0 1,936,939 95.03
4 414 Organic chemicals, plastics and synthetic fibers 1,927,716  Original DMR load is 1,927,974 0 1,927,716 96.6
5 432 Meat and Poultry Products 584,353  Original DMR load is 584,353 0 584,353 97.08
6 463 Plastics molding and forming 401,885 0 401,885 97.4
7 430 Pulp, paper and paperboard 329,407 0 329,407 97.6
8 418 Fertilizer manufacturing 283,909 0 283,909 97.9
9 419 Petroleum refining 263,608  Original DMR load is 263,608 0 263,608 98.1
10 414.1 CCH 248,276 0 248,276 98.3
11   Superfund Sites 247,829 0 247,829 98.5
12 421 Nonferrous metals manufacturing 230,385 0 230,385 98.7
13 434 Coal mining 230,167 0 230,167 98.9
14 435 Oil & Gas Extraction 207,136 0 207,136 99.07
15 433 Metal Finishing 204,020 0 204,020 99.2
16 410 Textile mills 123,220 0 123,220 99.3
17 440 Ore mining and dressing 113,922  Original DMR load is 113,913 0 113,922 99.4
18 415 Inorganic chemicals manufacturing 108,675 0 108,675 99.5
19 436 Mineral Mining and Processing 102,089 0 102,089 99.6
20 442 Transportation Equipment Cleaning 101,429 0 101,429 99.6
21   Miscellaneous Foods and Beverages 81,338 0 81,338 99.7
22 454 Gum and wood chemicals manufacturing 62,521 0 62,521 99.8
23   Unassigned Waste Facility 38,439 0 38,439 99.8
24 449 Airport Deicing 30,688  Original DMR load is 30,688 0 30,688 99.8
25 429 Timber products processing 28,242 0 28,242 99.8
26 422 Phosphate manufacturing 24,037 0 24,037 99.9
27 445 Landfills 16,131 0 16,131 99.9
28 455 Pesticide chemicals 13,751 0 13,751 99.9
29 444 Waste combustors 10,999  Original DMR load is 10,997 0 10,999 99.9
30 438 Metal Products and Machinery 9,726 0 9,726 99.9
31 406 Grain mills 7,227 0 7,227 99.9
32 437 Centralized Waste Treatment 6,714 0 6,714 99.9
33 439 Pharmaceutical manufacturing 5,926 0 5,926 99.9
34 464 Metal molding and casting (foundries) 4,528 0 4,528 99.9
35 471 Nonferrous metals forming and metal powders 4,219 0 4,219 99.9
36 414.2 Cellulose products manufacturing 4,092 0 4,092 99.9
37 409 Sugar processing 3,342  Original DMR load is 3,345 0 3,342 99.9
38 424 Ferroalloy manufacturing 3,180 0 3,180 99.9
39 411 Cement manufacturing 2,927 0 2,927 99.9
40 428 Rubber Manufacturing 2,774  Original DMR load is 2,775 0 2,774 99.9
41 426 Glass manufacturing 2,669 0 2,669 99.9
42 451 Concentrated Aquatic Animal Production 1,963  Original DMR load is 1,963 0 1,963 99.9
43 408 Canned and preserved seafood processing 1,900  Original DMR load is 1,900 0 1,900 99.9
44 467 Aluminum forming 1,746 0 1,746 99.9
45 468 Copper forming 1,605 0 1,605 99.9
46 405 Dairy products processing 1,466 0 1,466 99.9
47   Printing & Publishing 1,458 0 1,458 99.9
48 407 Canned and preserved fruits and vegetables processing 1,421 0 1,421 99.9
49 460 Hospital 980 0 980 99.9
50 417 Soap and detergent manufacturing 842 0 842 99.9
51 457 Explosives manufacturing 796 0 796 99.9
52   Independent and Stand Alone Labs 499 0 499 99.9
53 461 Battery manufacturing 221 0 221 99.9
54 450 Construction and Development 216 0 216 99.9
55 412 CAFO 87  Original DMR load is 87 0 87 99.9
56 425 Leather tanning and finishing 62 0 62 99.9
57 443 Paving and roofing materials (tars and asphalt) 57 0 57 99.9
58 469 Electrical and electronic components 38 0 38 99.9
59   Food Service Establishments 36 0 36 99.9
60 446 Paint formulating 13 0 13 99.9
61 458 Carbon black manufacturing 5 0 5 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   Industrial Laundries 0 0 0 100
69 466 Porcelain Enameling 0 0 0 100
70 413 Electroplating 0 0 0 100
TOTAL 122,584,492 0 122,584,492 100

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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