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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).

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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
4,4'-DDT 5,427 42.6 42.6
Chlorine, total residual 2,617 20.5 63.1
.alpha.-BHC 1,665 13.07 76.2
Hexachlorobenzene 1,607 12.6 88.8
Heptachlor 891 6.99 95.8
Endosulfan, total 207 1.62 97.4
Cyanide, total (as CN) 120 0.94 98.4
Zinc, total (as Zn) 45.4 0.35 98.7
Manganese, total (as Mn) 25.4 0.19 98.9
Arsenic, total (as As) 23.7 0.18 99.1

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
120401040606 Lower Greens Bayou 3,315
020402060103 Salem Canal-Whooping John Creek 1,113
070801010705 Boston Bay-Mississippi River 760
080702020801 Bayou Braud 151
041300010501 Jeddo Creek 8.15
030202020307 Mosley Creek-Neuse River 4.91
080702040302 Hope Canal-Pipeline Canal 2.95
040802010606 Sarle Drain-Tittabawassee River 1.73
050500080303 Tyler Creek-Kanawha River 1.65
120401040706 Goose Creek-Frontal Galveston Bay 0.62

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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 030501040401 4,4'-DDT 5,427
TX0003671 BASF CORP - BEAUMONT BEAUMONT, TX 2879 120402010300 Chlorine, total residual 1,867
TX0007439 GB BIOSCIENCES CORP HOUSTON, TX 2879 120401040606 .alpha.-BHC 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 CO MUSCATINE, IA 2879 070801010705 Chlorine, total residual 745
NJ0005100 E I DUPONT DE NEMOURS - CHAMBERS WORKS DEEPWATER, NJ 2869 020402060103 Endosulfan, total 207
NC0003719 DAK AMERICAS LLC FAYETTEVILLE, NC 2879 030300040707 Cyanide, total (as CN) 28.9

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