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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 pg, 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
Toxaphene 404,757 92.6 92.6
Heptachlor 12,490 2.85 95.5
4,4'-DDT 10,433 2.38 97.9
.alpha.-BHC 6,944 1.58 99.4
Chlorine, total residual 1,872 0.42 99.9
Endosulfan, total 313 0.071 99.9
.gamma.-BHC 14.8 0.0033 99.9
Vanadium, total (as V) 5.67 0.0013 99.9
Dicamba 4.68 0.00107 99.9
.delta.-Benzenehexachloride 2.99 0.00068 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
120401040606 Lower Greens Bayou 6,956
020402060103 Salem Canal-Whooping John Creek 1,507
020402020507 Woodbury Creek-Delaware River 997
041300010501 Jeddo Creek 0.84
020301050307 Upper Millstone River 0.094

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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 Toxaphene 403,763
SC0002682 WEYLCHEM US INC ELGIN, SC 2869 030501040401 Heptachlor 11,310
SC0002682 WEYLCHEM US INC ELGIN, SC 2869 030501040401 p,p'-DDT 10,431
TX0007439 GB BIOSCIENCES CORP HOUSTON, TX 2879 120401040606 .alpha.-Hexachlorocyclohexane 6,944
TX0003671 BASF CORP - BEAUMONT BEAUMONT, TX 2879 120402010300 Total Residual Chlorine 1,867
NJ0005100 DUPONT CHAMBERS WORKS DEEPWATER, NJ 2869 020402060103 Heptachlor 1,179
NJ0005134 GEO SPECIALTY CHEMICALS INC GIBBSTOWN, NJ 2869 020402020507 Toxaphene 993
NJ0005100 DUPONT CHAMBERS WORKS DEEPWATER, NJ 2869 020402060103 Endosulfan 313
NJ0005100 DUPONT CHAMBERS WORKS DEEPWATER, NJ 2869 020402060103 Lindane 14.8
TX0007439 GB BIOSCIENCES CORP HOUSTON, TX 2879 120401040606 Vanadium 5.67

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