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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 - Ore mining and dressing (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
ARSENIC AND ARSENIC COMPOUNDS 831,488 7.07 831,495 67.4 67.4
COPPER AND COPPER COMPOUNDS 300,964 544 301,508 24.4 91.8
LEAD AND LEAD COMPOUNDS 33,635 4.94 33,640 2.72 94.6
ZINC AND ZINC COMPOUNDS 22,207 2.1 22,209 1.801 96.4
SILVER AND SILVER COMPOUNDS 16,470 9.88 16,470 1.33 97.7
NICKEL AND NICKEL COMPOUNDS 11,241 0.24 11,241 0.91 98.6
CADMIUM AND CADMIUM COMPOUNDS 5,174 0 5,174 0.41 99.09
VANADIUM AND VANADIUM COMPOUNDS 4,531 0 4,531 0.36 99.4
MANGANESE AND MANGANESE COMPOUNDS 3,293 0.21 3,293 0.26 99.7
MERCURY AND MERCURY COMPOUNDS 1,079 1.17 1,080 0.087 99.8

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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)
110100070301 Strother Creek 13,155 0 13,155
110100070102 Bee Fork 11,899 0 11,899
110100070101 Upper West Fork Black River 6,410 0 6,410
080401010806 Lake Hamilton Dam 4,555 0 4,555
110100070401 Headwaters Logan Creek 3,083 0 3,083
041503020801 Turnpike Creek-Oswegatchie River 1,057 0 1,057
101900040103 West Fork Clear Creek 424 0 424
060101040304 Holston River-Lost Creek 236 0 236
170103020301 Twomile Creek-South Fork Coeur d'Alene River 162 0 162
170103020101 Little North Fork South Fork Coeur d'Alene River-South Fork Coeur d'Alene River 58.55 0 58.55

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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)
89801JRRTT50MIL JERRITT CANYON MINE ELKO, NV 212221 160401010506 ARSENIC AND ARSENIC COMPOUNDS 827,679 0 827,679
89801JRRTT50MIL JERRITT CANYON MINE ELKO, NV 212221 160401010506 COPPER AND COPPER COMPOUNDS 298,071 0 298,071
89801JRRTT50MIL JERRITT CANYON MINE ELKO, NV 212221 160401010506 ZINC AND ZINC COMPOUNDS 20,211 0 20,211
65440BCKMNHWYKK BUICK MINE/MILL BOSS, MO 212231 110100070301 LEAD AND LEAD COMPOUNDS 11,906 0 11,906
63629FLTCHHWYTT FLETCHER MINE/MILL CENTERVILLE, MO 212231 110100070102 LEAD AND LEAD COMPOUNDS 11,720 0 11,720
89801JRRTT50MIL JERRITT CANYON MINE ELKO, NV 212221 160401010506 NICKEL AND NICKEL COMPOUNDS 11,026 0 11,026
84006KNNCT12300 KENNECOTT UTAH COPPER MINE CONCENTRATORS & POWER PLANT COPPERTON, UT 212234 160202040106 SILVER AND SILVER COMPOUNDS 8,235 0 8,235
84006KNNCT8362W KENNECOTT UTAH COPPER SMELTER & REFINERY MAGNA, UT 331411 160202040402 SILVER AND SILVER COMPOUNDS 8,235 0 8,235
63629BRSHYHWYKK BRUSHY CREEK MINE/MILL BOSS, MO 212231 110100070101 LEAD AND LEAD COMPOUNDS 5,965 0 5,965
71901SVNDM5911M STRATCOR INC HOT SPRINGS, AR 212299 080401010806 VANADIUM AND VANADIUM COMPOUNDS 4,500 0 4,500

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