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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 - CCH (TRI)

EPA 304M Annual Review icon — Indicates load was altered by EPA’s 304M Annual Review. You can hover over the green flag to see the original load from the TRI data.

Top Chemicals - Toxic-Weighted Pounds (TWPE) (2011)
Chemical Name Direct TRI TWPE (lb-eq/yr) Indirect TRI TWPE (lb-eq/yr) Total TRI TWPE (lb-eq/yr) % of Category TWPE Cumulative % of
Category TWPE
DIOXIN AND DIOXIN-LIKE COMPOUNDS 2,403,604 0 2,403,604 96.2 96.2
HEXACHLOROBENZENE 75,085 261 75,346 3.016 99.2
MERCURY AND MERCURY COMPOUNDS 10,437 0 10,437 0.41 99.6
COPPER AND COPPER COMPOUNDS 3,707 0 3,707 0.14 99.8
LEAD AND LEAD COMPOUNDS 1,997 170 2,166 0.086 99.9
NITRATE COMPOUNDS 662 0.201 662 0.026 99.9
MANGANESE AND MANGANESE COMPOUNDS 348 0 348 0.013 99.9
ZINC AND ZINC COMPOUNDS 300 0.81 300 0.012 99.9
ETHYLENE GLYCOL 182 0 182 0.0072 99.9
AMMONIA 170 0 170 0.0068 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Direct TRI TWPE (lb-eq/yr) Indirect TRI TWPE (lb-eq/yr) Total TRI TWPE (lb-eq/yr)
080703000207 Bayou Bourbeaux 915,617 0 915,617
080901000101 Mississippi River-Bonnet Carre Spillway 656,020 0 656,020
080802060301 Maple Fork-Bayou D'Inde 490,491 0 490,491
050301061004 Lower West Virginia Fork Fish Creek 218,207 0 218,207
080701000104 Manchac Point 114,534 0 114,534
060400060502 Guess Creek-Tennessee River 46,650 0 46,650
080701000105 Claiborne Island 10,350 0 10,350
111403060411 Tete Bayou-Frontal Caddo Lake 7,845 0 7,845
060200021406 Hiwassee River-Dry Valley 5,785 0 5,785
060300050803 Sweetwater Creek-Tennessee River 4,822 0 4,822

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Top Facility Discharges in Toxic-Weighted Pounds (TWPE) (2011)
TRI Facility ID Facility Name City, State NAICS Code HUC-12 Code Top Chemical Top Chemcical Direct TRI TWPE (lb-eq/yr) Top Chemcical Indirect TRI TWPE (lb-eq/yr) Top Chemcical Total TRI TWPE (lb-eq/yr)
70765THDWCHIGHW THE DOW CHEMICAL CO - LOUISIANA OPERATIONS PLAQUEMINE, LA 325199 080703000207 DIOXIN AND DIOXIN-LIKE COMPOUNDS 864,620 0 864,620
70057CCDNTLAHWY OCCIDENTAL CHEMICAL CORP HAHNVILLE, LA 325181 080901000101 DIOXIN AND DIOXIN-LIKE COMPOUNDS 655,648 0 655,648
70669PPGNDCOLUM PPG INDUSTRIES INC WESTLAKE, LA 325181 080802060301 DIOXIN AND DIOXIN-LIKE COMPOUNDS 486,578 0 486,578
26155PPGNDSTATE PPG INDUSTRIES INC NEW MARTINSVILLE, WV 325181 050301061004 DIOXIN AND DIOXIN-LIKE COMPOUNDS 216,769 0 216,769
70805FRMSPGULFS FORMOSA PLASTICS CORP LOUISIANA BATON ROUGE, LA 325211 080701000104 DIOXIN AND DIOXIN-LIKE COMPOUNDS 65,450 0 65,450
70765THDWCHIGHW THE DOW CHEMICAL CO - LOUISIANA OPERATIONS PLAQUEMINE, LA 325199 080703000207 HEXACHLOROBENZENE 50,251 0 50,251
70765GRGGLHIGHW GEORGIA GULF CHEMICALS & VINYL S LLC PLAQUEMINE, LA 325211 080701000104 DIOXIN AND DIOXIN-LIKE COMPOUNDS 48,004 0 48,004
42029WSTLK2468I WESTLAKE VINYLS INC CALVERT CITY, KY 325199 060400060502 DIOXIN AND DIOXIN-LIKE COMPOUNDS 28,898 0 28,898
78359CCDNTHWY36 OCCIDENTAL CHEMICAL CORP GREGORY, TX 325199 DIOXIN AND DIOXIN-LIKE COMPOUNDS 20,215 0 20,215
42029WSTLK2468I WESTLAKE VINYLS INC CALVERT CITY, KY 325199 060400060502 HEXACHLOROBENZENE 17,529 0 17,529

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