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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 - 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
LEAD AND LEAD COMPOUNDS 33,498 4.94 33,503 53.6 53.6
SILVER AND SILVER COMPOUNDS 8,235 9.88 8,245 13.2 66.8
VANADIUM AND VANADIUM COMPOUNDS 4,516 0 4,516 7.23 74.08
MANGANESE AND MANGANESE COMPOUNDS 3,609 5.37 3,614 5.78 79.8
COPPER AND COPPER COMPOUNDS 2,721 544 3,265 5.22 85.1
CADMIUM AND CADMIUM COMPOUNDS 2,512 0 2,512 4.022 89.1
ZINC AND ZINC COMPOUNDS 2,046 2.1 2,048 3.27 92.4
ARSENIC AND ARSENIC COMPOUNDS 1,549 7.07 1,556 2.49 94.8
MERCURY AND MERCURY COMPOUNDS 1,074 1.17 1,076 1.72 96.6
NITRATE COMPOUNDS 1,057 0.00038 1,057 1.69 98.3

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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)
080401010806 Lake Hamilton Dam 4,555 0 4,555
110100070401 Headwaters Logan Creek 3,083 0 3,083
020600031202 Curtis Creek-Curtis Bay 1,167 5.16 1,172
041503020801 Turnpike Creek-Oswegatchie River 1,057 0 1,057
060101040304 Holston River-Lost Creek 163 0 163
170103020301 Twomile Creek-South Fork Coeur d'Alene River 162 0 162
051301060310 Cumberland River-Turkey Creek 68.56 0 68.56
071100040301 Ghost Hollow-Mississippi River 36.4 0 36.4
101202030302 Middle Spearfish Creek 31.04 0 31.04
060101040305 Holston River-Beaver Creek 28.76 0 28.76

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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)
65440BCKMNHWYKK BUICK MINE/MILL BOSS, MO 212231 LEAD AND LEAD COMPOUNDS 11,906 0 11,906
63629FLTCHHWYTT FLETCHER MINE/MILL CENTERVILLE, MO 212231 LEAD AND LEAD COMPOUNDS 11,720 0 11,720
84006KNNCT12300 KENNECOTT UTAH COPPER MINE CONCENTRATORS & POWER PLANT BINGHAM CANYON, UT 212234 SILVER AND SILVER COMPOUNDS 8,235 0 8,235
63629BRSHYHWYKK BRUSHY CREEK MINE/MILL BOSS, MO 212231 LEAD AND LEAD COMPOUNDS 5,965 0 5,965
71901SVNDM5911M EVRAZ STRATCOR INC HOT SPRINGS, AR 212291 080401010806 VANADIUM AND VANADIUM COMPOUNDS 4,500 0 4,500
63638SWTMMHIGHW SWEETWATER MINE/MILL ELLINGTON, MO 212231 110100070401 LEAD AND LEAD COMPOUNDS 2,948 0 2,948
8042WCLMXMHIGHW CLIMAX MOLYBDENUM CO-CLIMAX MINE CLIMAX, CO 212299 MANGANESE AND MANGANESE COMPOUNDS 2,520 0 2,520
88065PHLPSHWY90 FREEPORT MCMORAN TYRONE INC TYRONE, NM 212234 150400020301 COPPER AND COPPER COMPOUNDS 1,260 0 1,260
84006KNNCT12300 KENNECOTT UTAH COPPER MINE CONCENTRATORS & POWER PLANT BINGHAM CANYON, UT 212234 CADMIUM AND CADMIUM COMPOUNDS 1,119 0 1,119
65440BCKMNHWYKK BUICK MINE/MILL BOSS, MO 212231 ZINC AND ZINC COMPOUNDS 856 0 856

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