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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 78.4 78.4
Hexachlorobenzene 63,352 12.2 90.7
Heptachlor 12,490 2.42 93.1
4,4'-DDT 10,868 2.106 95.2
.alpha.-BHC 6,945 1.34 96.5
Benzo(a)pyrene 6,246 1.21 97.7
Chlorine, total residual 2,788 0.54 98.3
Benzo(k)fluoranthene 1,791 0.34 98.6
Chrysene 1,585 0.307 98.9
Benzo(a)anthracene 1,568 0.303 99.2

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
080701000105 Claiborne Island 75,282
120401040606 Lower Greens Bayou 8,596
041300010501 Jeddo Creek 1,155
020402020507 Woodbury Creek-Delaware River 997
070801010705 Boston Bay-Mississippi River 760
020802060101 Almond Creek-James River 56.01
020802060201 Bailey Creek-James River 54.7
060101020704 Kendrick Creek-South Fork Holston River 38.4
071200050701 Heidecke Lake-Illinois River 17.2
071402010206 Town of Ficklin-Kaskaskia River 16.2

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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
LA0005487 SYNGENTA CROP PROTECTION LLC SAINT GABRIEL FACILITY SAINT GABRIEL, LA 2879 080701000105 Hexachlorobenzene 61,745
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
LA0005487 SYNGENTA CROP PROTECTION LLC SAINT GABRIEL FACILITY SAINT GABRIEL, LA 2879 080701000105 Benzo[a]pyrene 6,246
TX0003671 BASF CORP - BEAUMONT BEAUMONT, TX 2879 120402010300 Total Residual Chlorine 1,867
LA0005487 SYNGENTA CROP PROTECTION LLC SAINT GABRIEL FACILITY SAINT GABRIEL, LA 2879 080701000105 Benzo[k]fluoranthene 1,791
TX0007439 GB BIOSCIENCES CORP HOUSTON, TX 2879 120401040606 Hexachlorobenzene 1,607
LA0005487 SYNGENTA CROP PROTECTION LLC SAINT GABRIEL FACILITY SAINT GABRIEL, LA 2879 080701000105 Chrysene 1,585

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