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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 more information on the types of errors identified, see EPA's Technical Support Document for the 2010 Effluent Guidelines Program (PDF) (255 pp, 3.4MB). Because of this review, and EPA's methodology for interpreting data and calculating loads (explained in EPA's Technical Support Document for the Annual Review of Existing Effluent Guidelines and Identification of Potential New Point Source Categories), the calculated loads and category rankings may differ using DMR and TRI data that has not been updated. Data that have been updated by EPA's annual reviews are flagged by green flags designating that a change has been made to a concentration, quantity, or flow value. View a listing of the changes for the most recent annual review (PDF) (1 p, 7K).

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
.alpha.-BHC 6,944 28.2 28.2
4,4'-DDT 5,427 22.05 50.2
Carbaryl, total 4,606 18.7 68.9
Chlorine, total residual 1,874 7.61 76.6
Hexachlorobenzene 1,607 6.53 83.1
Fluoride, total (as F) 1,086 4.41 87.5
Heptachlor 891 3.61 91.1
Boron, total recoverable 393 1.59 92.7
Arsenic, total recoverable 310 1.25 94.02
Chlorpyrifos 254 1.033 95.06

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
120401040606 Lower Greens Bayou 8,601
031002040103 English Creek 1,804
040802010606 Sarle Drain-Tittabawassee River 256
020802060201 Bailey Creek-James River 235
031602050105 Deer River 186
080701000105 Claiborne Island 151
031602040105 Cold Creek 18.4
041300010501 Jeddo Creek 8.15
080702040302 Hope Canal-Pipeline Canal 2.95
071200040905 Des Plaines River 0.48

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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)
TX0007439 GB BIOSCIENCES CORP HOUSTON, TX 2879 120401040606 .alpha.-Hexachlorocyclohexane 6,944
SC0002682 WEYLCHEM US INC ELGIN, SC 2869 030501040401 p,p'-DDT 5,427
WV0000086 AVENTIS CROPSCIENCE USA LP INSTITUTE, WV 2869 Carbaryl 4,606
TX0003671 BASF CORP - BEAUMONT BEAUMONT, TX 2879 120402010300 Total Residual Chlorine 1,867
TX0007439 GB BIOSCIENCES CORP HOUSTON, TX 2879 120401040606 Hexachlorobenzene 1,607
FL0034657 CORONET INDUSTRIES INC. PLANT CITY, FL 2879 031002040103 Fluoride 1,086
NJ0005100 EI DUPONT DENEMOURS & CO DEEPWATER, NJ 2869 Heptachlor 891
FL0034657 CORONET INDUSTRIES INC. PLANT CITY, FL 2879 031002040103 Boron 393
FL0034657 CORONET INDUSTRIES INC. PLANT CITY, FL 2879 031002040103 Arsenic 285
MI0000868 THE DOW CHEMICAL CO MIDLAND, MI 2869 040802010606 Chlorpyrifos 254

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