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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).

Point Source Category Information - Pesticide chemicals (DMR)

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 data.

Top Pollutants - Toxic-Weighted Pounds (TWPE) (2011)
Pollutant Name Total DMR TWPE (lb-eq/yr) % of Category TWPE Cumulative % of
Category TWPE
p,p'-DDT 5,427 27.3 27.3
Total Residual Chlorine 4,654 23.4 50.8
Carbaryl 4,360 22.002 72.8
.alpha.-Hexachlorocyclohexane 1,665 8.401 81.2
Hexachlorobenzene 1,607 8.109 89.3
Heptachlor 891 4.49 93.8
Methomyl 237 1.19 95.07
Endosulfan 207 1.043 96.1
Chloride 183 0.92 97.04
Cyanide 135 0.68 97.7

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
050500080303 Tyler Creek-Kanawha River 4,603
120401040606 Lower Greens Bayou 3,369
020402060103 Salem Canal-Whooping John Creek 1,113
070801010705 Boston Bay-Mississippi River 760
031602050105 Deer River 188
080702020801 Bayou Braud 151
103001010106 Blue River Outlet 130
071100040304 Bay Island-Mississippi River 34.3
080302040800 20.8
080302090200 17.6

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Top Facility Discharges in Toxic-Weighted Pounds (TWPE) (2011)
NPDES ID Facility Name City, State SIC Code HUC-12 Code Top Pollutant Top Pollutant TWPE (lb-eq/yr)
SC0002682 WEYLCHEM US INC ELGIN, SC 2869 030501040304 p,p'-DDT 5,427
WV0000086 INSTITUTE PLANT INSTITUTE, WV 2869 050500080303 Carbaryl 4,360
TX0003671 BASF CORP - BEAUMONT BEAUMONT, TX 2879 120402010300 Total Residual Chlorine 3,909
TX0007439 GB BIOSCIENCES CORP HOUSTON, TX 2879 120401040606 .alpha.-Hexachlorocyclohexane 1,665
TX0007439 GB BIOSCIENCES CORP HOUSTON, TX 2879 120401040606 Hexachlorobenzene 1,607
NJ0005100 E I DUPONT DE NEMOURS - CHAMBERS WORKS DEEPWATER, NJ 2869 020402060103 Heptachlor 891
IA0000205 MONSANTO COMPANY MUSCATINE, IA 2879 070801010705 Total Residual Chlorine 745
WV0000086 INSTITUTE PLANT INSTITUTE, WV 2869 050500080303 Methomyl 237
NJ0005100 E I DUPONT DE NEMOURS - CHAMBERS WORKS DEEPWATER, NJ 2869 020402060103 Endosulfan 207
AL0023272 EVONIK DEGUSSA CORP THEODORE, AL 2879 031602050105 Chloride 182

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