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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).

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 5,087,038 0 5,087,038 96.8 96.8
HEXACHLOROBENZENE 142,826 261 143,087 2.72 99.5
MERCURY AND MERCURY COMPOUNDS 10,437 3.79 10,441 0.19 99.7
COPPER AND COPPER COMPOUNDS 4,098 0 4,098 0.078 99.8
LEAD AND LEAD COMPOUNDS 2,109 170 2,278 0.043 99.8
1,2,3-TRICHLOROPROPANE 2,188 0 2,188 0.041 99.9
ALLYL ALCOHOL 916 0 916 0.017 99.9
NITRATE COMPOUNDS 665 0.201 665 0.012 99.9
ZINC AND ZINC COMPOUNDS 465 0.81 466 0.0088 99.9
MANGANESE AND MANGANESE COMPOUNDS 348 0 348 0.0066 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 656,137 0 656,137
080802060301 Maple Fork-Bayou D'Inde 490,491 0 490,491
050302011004 Haynes Run-Ohio River 218,207 0 218,207
120401040706 Goose Creek-Frontal Galveston Bay 162,362 0 162,362
080701000104 Manchac Point 65,590 0 65,590
080703000401 Bayou La Butte-Logging Canal 48,944 0 48,944
060400060502 Guess Creek-Tennessee River 46,650 0 46,650
121102010003 Kinney Bayou 20,257 0 20,257
080701000105 Claiborne Island 10,327 0 10,327

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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 Chemical Direct TRI TWPE (lb-eq/yr) Top Chemical Indirect TRI TWPE (lb-eq/yr) Top Chemical Total TRI TWPE (lb-eq/yr)
77541THDWCBUILD DOW CHEMICAL CO FREEPORT FACILITY FREEPORT, TX 486990 120701040505 DIOXIN AND DIOXIN-LIKE COMPOUNDS 2,523,132 0 2,523,132
70765THDWCHIGHW THE DOW CHEMICAL CO - LOUISIANA OPERATIONS PLAQUEMINE, LA 325998 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 EAGLE US 2 LLC WESTLAKE, LA 325181 080802060301 DIOXIN AND DIOXIN-LIKE COMPOUNDS 486,578 0 486,578
26155PPGNDSTATE EAGLE NATRIUM LLC PROCTOR, WV 325181 050302011004 DIOXIN AND DIOXIN-LIKE COMPOUNDS 216,769 0 216,769
77571LPRTC2400M OXY VINYLS LP LA PORTE VCM PLANT LA PORTE, TX 325199 120401040706 DIOXIN AND DIOXIN-LIKE COMPOUNDS 160,303 0 160,303
77541THDWCBUILD DOW CHEMICAL CO FREEPORT FACILITY FREEPORT, TX 486990 120701040505 HEXACHLOROBENZENE 66,125 0 66,125
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 325998 080703000207 HEXACHLOROBENZENE 50,251 0 50,251
70765GRGGLHIGHW AXIALL LLC PLAQUEMINE, LA 325211 080703000401 DIOXIN AND DIOXIN-LIKE COMPOUNDS 48,004 0 48,004

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