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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 p, 7K).

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
DIOXIN AND DIOXIN-LIKE COMPOUNDS 279,154 0 279,154 85.4 85.4
MANGANESE AND MANGANESE COMPOUNDS 13,954 121 13,959 4.27 89.6
POLYCHLORINATED BIPHENYLS 7,013 0 7,013 2.14 91.8
MERCURY AND MERCURY COMPOUNDS 4,104 142 4,242 1.29 93.1
NITRATE COMPOUNDS 3,126 1,946 3,873 1.18 94.3
CHROMIUM AND CHROMIUM COMPOUNDS 3,694 34.05 3,702 1.13 95.4
COPPER AND COPPER COMPOUNDS 2,670 187 2,823 0.86 96.2
ZINC AND ZINC COMPOUNDS 2,184 29.2 2,186 0.66 96.9
ARSENIC AND ARSENIC COMPOUNDS 1,609 1.41 1,609 0.49 97.4
LEAD AND LEAD COMPOUNDS 1,483 111 1,549 0.47 97.9

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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)
041201010606 Town of North Kingsville-Frontal Lake Erie 273,831 0 273,831
060400050404 Tennessee River-Beaverdam Creek 13,164 0 13,164
080702020801 Bayou Braud 12,682 0 12,682
041100030105 Lower Ashtabula River 6,340 0 6,340
080702040302 Hope Canal-Pipeline Canal 3,560 0 3,560
080802050405 Richards Lake-Houston River 3,497 0 3,497
020402040000 Delaware Bay-Deep 1,369 0 1,369
020600031202 Curtis Creek-Curtis Bay 1,167 5.16 1,172
020401060502 Aquashicola Creek-Lehigh River 1,060 11.3 1,072
050902021404 Duck Creek 15.1 879 894

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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)
44004SCMCH2900M MILLENNIUM INORGANIC CHEMICALS A CRISTAL CO ASHTABULA, OH 325131 041201010606 DIOXIN AND DIOXIN-LIKE COMPOUNDS 273,040 0 273,040
37134DPNTJ1DUPO DUPONT JOHNSONVILLE PLANT NEW JOHNSONVILLE, TN 325131 060400050404 POLYCHLORINATED BIPHENYLS 6,807 0 6,807
44004SCMCH2426M MILLENNIUM INORGANIC CHEMICALS A CRISTAL CO ASHTABULA, OH 325131 041100030105 MANGANESE AND MANGANESE COMPOUNDS 5,530 0 5,530
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325188 080702020801 CHROMIUM AND CHROMIUM COMPOUNDS 3,628 0 3,628
70052KSRLMAIRLI NORANDA ALUMINA LLC GRAMERCY, LA 331311 080702040302 MERCURY AND MERCURY COMPOUNDS 3,540 0 3,540
37134DPNTJ1DUPO DUPONT JOHNSONVILLE PLANT NEW JOHNSONVILLE, TN 325131 060400050404 DIOXIN AND DIOXIN-LIKE COMPOUNDS 3,103 0 3,103
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325188 080702020801 MANGANESE AND MANGANESE COMPOUNDS 2,795 0 2,795
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325188 080702020801 COPPER AND COPPER COMPOUNDS 1,943 0 1,943
70669KRNSL3300B LOUISIANA PIGMENT CO LP WESTLAKE, LA 325131 080802050405 MANGANESE AND MANGANESE COMPOUNDS 1,839 0 1,839
70734RCDNCHIGHW PCS NITROGEN FERTILIZER LP GEISMAR, LA 325188 080702020801 ZINC AND ZINC COMPOUNDS 1,670 0 1,670

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