Jump to main content or area navigation.

Contact Us

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).

EPA is working to resolve a problem with linkages in EPA's Facility Registry Service (FRS) for Clean Water Act permits. Read More...

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.

2015 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)
1 426 Glass manufacturing 20,638,086 0 20,638,086 70.3
2 423 Steam electric power generating 3,574,947  Original DMR load is 3,574,949 0 3,574,947 82.4
3 420 Iron and steel manufacturing 1,274,444 0 1,274,444 86.8
4 414.1 CCH 776,731 0 776,731 89.4
5   Superfund Sites 445,548 0 445,548 90.9
6 436 Mineral Mining and Processing 418,415 0 418,415 92.4
7 418 Fertilizer manufacturing 288,696 0 288,696 93.4
8 414 Organic chemicals, plastics and synthetic fibers 206,088 0 206,088 94.1
9 419 Petroleum refining 201,815  Original DMR load is 201,815 0 201,815 94.7
10 421 Nonferrous metals manufacturing 193,282 0 193,282 95.4
11 440 Ore mining and dressing 174,437  Original DMR load is 174,443 0 174,437 96.04
12   Drinking Water Treatment 164,027  Original DMR load is 163,296 0 164,027 96.6
13 415 Inorganic chemicals manufacturing 161,609 0 161,609 97.1
14 445 Landfills 135,867 0 135,867 97.6
15   Unassigned Waste Facility 134,514 0 134,514 98.07
16 433 Metal Finishing 82,689 0 82,689 98.3
17 430 Pulp, paper and paperboard 80,146 0 80,146 98.6
18 435 Oil & Gas Extraction 79,239 0 79,239 98.9
19   Miscellaneous Foods and Beverages 52,705 0 52,705 99.08
20 414.2 Cellulose products manufacturing 36,366 0 36,366 99.2
21 437 Centralized Waste Treatment 27,824 0 27,824 99.3
22 449 Airport Deicing 26,768 0 26,768 99.3
23 455 Pesticide chemicals 24,065 0 24,065 99.4
24 438 Metal Products and Machinery 23,150 0 23,150 99.5
25 429 Timber products processing 22,935 0 22,935 99.6
26 432 Meat and Poultry Products 20,161 0 20,161 99.6
27 434 Coal mining 19,420 0 19,420 99.7
28 410 Textile mills 15,309 0 15,309 99.8
29 417 Soap and detergent manufacturing 10,277 0 10,277 99.8
30 451 Concentrated Aquatic Animal Production 9,407 0 9,407 99.8
31 406 Grain mills 5,299 0 5,299 99.9
32 422 Phosphate manufacturing 4,050 0 4,050 99.9
33 439 Pharmaceutical manufacturing 3,776 0 3,776 99.9
34 444 Waste combustors 3,558  Original DMR load is 3,550 0 3,558 99.9
35 409 Sugar processing 3,065 0 3,065 99.9
36 428 Rubber Manufacturing 1,871  Original DMR load is 1,874 0 1,871 99.9
37 468 Copper forming 1,842 0 1,842 99.9
38 411 Cement manufacturing 1,760 0 1,760 99.9
39 467 Aluminum forming 1,700 0 1,700 99.9
40 463 Plastics molding and forming 1,366 0 1,366 99.9
41   Printing & Publishing 1,177 0 1,177 99.9
42 408 Canned and preserved seafood processing 834 0 834 99.9
43 471 Nonferrous metals forming and metal powders 659 0 659 99.9
44 405 Dairy products processing 516 0 516 99.9
45   Independent and Stand Alone Labs 457 0 457 99.9
46 464 Metal molding and casting (foundries) 344 0 344 99.9
47 454 Gum and wood chemicals manufacturing 343 0 343 99.9
48 442 Transportation Equipment Cleaning 241 0 241 99.9
49 460 Hospital 234 0 234 99.9
50 407 Canned and preserved fruits and vegetables processing 219 0 219 99.9
51 457 Explosives manufacturing 193 0 193 99.9
52 461 Battery manufacturing 142 0 142 99.9
53 424 Ferroalloy manufacturing 127 0 127 99.9
54 469 Electrical and electronic components 75 0 75 99.9
55 443 Paving and roofing materials (tars and asphalt) 36 0 36 99.9
56   Food Service Establishments 25 0 25 99.9
57 465 Coil coating 6 0 6 99.9
58 446 Paint formulating 3 0 3 99.9
59 450 Construction and Development 1 0 1 99.9
60 412 CAFO 1 0 1 99.9
61 427 Asbestos manufacturing 0 0 0 99.9
62   Tobacco Products 0 0 0 99.9
63 425 Leather tanning and finishing 0 0 0 100
64 447 Ink formulating 0 0 0 100
65 466 Porcelain Enameling 0 0 0 100
66   Photo Processing 0 0 0 100
67   Industrial Laundries 0 0 0 100
68 413 Electroplating 0 0 0 100
69 459 Photographic 0 0 0 100
70 458 Carbon black manufacturing 0 0 0 100
TOTAL 29,352,888 0 29,352,888 100

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.

About the Data Glossary Error Correction Contact Us

Jump to main content.