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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 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.

Point Source Category Information - Inorganic chemicals manufacturing (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
MANGANESE AND MANGANESE COMPOUNDS 27,523 8.23 27,532 29.3 29.3
VANADIUM AND VANADIUM COMPOUNDS 19,795 523 20,318 21.6 50.9
POLYCYCLIC AROMATIC COMPOUNDS 14,361  Original TRI load is 15,478 15.3 14,376 15.3 66.3
DIAMINOTOLUENE (MIXED ISOMERS) 0 7,229 7,229 7.702 74.008
ARSENIC AND ARSENIC COMPOUNDS 5,254 1.21 5,255 5.59 79.6
CHROMIUM AND CHROMIUM COMPOUNDS 3,698 6.15 3,704 3.94 83.5
NITRATE COMPOUNDS 1,808 1,561 3,370 3.59 87.1
COPPER AND COPPER COMPOUNDS 2,271 170 2,442 2.601 89.7
ZINC AND ZINC COMPOUNDS 1,699 23.4 1,722 1.83 91.5
O-TOLUIDINE 0 1,668 1,668 1.77 93.3

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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)
080702020801 Bayou Braud 21,703 0 21,703
080801020903 Yokely Bayou-Frontal Intercoastal Waterway 14,338  Original load is 15,455 0 14,338
120401040703 Vince Bayou-Buffalo Bayou 114 9,577 9,691
080702040400 5,248 0 5,248
050400010104 Wolf Creek 0 1,558 1,558
120401040706 Goose Creek-Frontal Galveston Bay 537 0 537
060400050402 Tennessee River-Indian Creek 531 0 531
020600031202 Curtis Creek-Curtis Bay 406 0 406
080102090406 Loosahatchie River-Outlet 15.9 354 370
041201010406 Presque Isle Bay-Frontal Lake Erie 2.17 344 346

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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)
39746KRRMCUSHWY TRONOX LLC (PART) HAMILTON, MS 325180 031601011404 MANGANESE AND MANGANESE COMPOUNDS 22,774 0 22,774
70583CBTCRSTATE CABOT CORP CANAL PLANT CENTERVILLE, LA 325180 080801020903 POLYCYCLIC AROMATIC COMPOUNDS 14,334 0 14,334
39746KRRMCUSHWY TRONOX LLC (PART) HAMILTON, MS 325180 031601011404 VANADIUM AND VANADIUM COMPOUNDS 10,823 0 10,823
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325180 080702020801 VANADIUM AND VANADIUM COMPOUNDS 8,588 0 8,588
77506RPRDC1423H AIR PRODUCTS LLC PASADENA, TX 325120 120401040703 DIAMINOTOLUENE (MIXED ISOMERS) 0 7,229 7,229
70734LLDSGHWY31 HONEYWELL INTERNATIONAL INC GEISMAR PLANT CARVILLE, LA 325120 080702040400 ARSENIC AND ARSENIC COMPOUNDS 5,229 0 5,229
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325180 080702020801 MANGANESE AND MANGANESE COMPOUNDS 4,113 0 4,113
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325180 080702020801 CHROMIUM AND CHROMIUM COMPOUNDS 3,628 0 3,628
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325180 080702020801 COPPER AND COPPER COMPOUNDS 1,921 0 1,921
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325180 080702020801 ZINC AND ZINC COMPOUNDS 1,670 0 1,670

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