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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 pg, 7K).

Point Source Category Information - Ore mining and dressing (DMR)

EPA 304M Annual Review flag — Indicates load was altered by EPA’s 304M Annual Review. You can hover over the green flag to see the original load from the DMR data.

Top Pollutants - Toxic-Weighted Pounds (TWPE) (2011)
Pollutant Name Total DMR TWPE (lb-eq/yr) % of Category TWPE Cumulative % of
Category TWPE
Arsenic, total recoverable 4,421  Original DMR load is 92,809 6.18 6.18
Fluoride, total (as F) 17,774 24.8 31.03
Arsenic, total (as As) 8,592 12.01 43.05
Cadmium, total (as Cd) 5,952 8.32 51.3
Molybdenum, total (as Mo) 5,689 7.95 59.3
Copper, total (as Cu) 5,639 7.88 67.2
Mercury, total (as Hg) 4,521  Original DMR load is 4,521 6.32 73.5
Manganese, potentially dissolvd 4,381 6.12 79.6
Lead, total (as Pb) 2,627 3.67 83.3
Cadmium, potentially dissolvd 2,009 2.81 86.1

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
041503020801 Turnpike Creek-Oswegatchie River 1,567
040301100109 Green Creek 1,518
101900010101 Mosquito Creek 855
170602031001 Upper Napias Creek 851
101202020207 Upper Whitewood Creek 777
040201050101 Deer Lake-Carp Creek 666
101900040103 West Fork Clear Creek 388
060101040304 Holston River-Lost Creek 294
051301080908 Caney Fork River Outlet 189
060101040305 Holston River-Beaver Creek 123

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Top Facility Discharges in Toxic-Weighted Pounds (TWPE) (2011)
NPDES ID Facility Name City, State SIC Code HUC-12 Code Top Pollutant Top Pollutant TWPE (lb-eq/yr)
AK0053341 SUMITOMO METAL MINING POGO LLC - POGO MINE DELTA JUNCTION, AK 1041 190405031702 Arsenic 516  Original DMR load is 88,904
CO0000248 CLIMAX MOLYBDENUM CO CLIMAX MINE CLIMAX, CO 1061 140100020303 Fluoride 16,192
UT0000051 KENNECOTT UTAH COPPER SMELTER & REFINERY MAGNA, UT 1021 160202040402 Arsenic 5,472
CO0000248 CLIMAX MOLYBDENUM CO CLIMAX MINE CLIMAX, CO 1061 140100020303 Molybdenum 5,210
CO0000248 CLIMAX MOLYBDENUM CO CLIMAX MINE CLIMAX, CO 1061 140100020303 Manganese 4,378
UT0000051 KENNECOTT UTAH COPPER SMELTER & REFINERY MAGNA, UT 1021 160202040402 Cadmium 4,156
MN0055301 NORTHSHORE MINING - SILVER BAY SILVER BAY, MN 1011 Copper 3,028
CO0000248 CLIMAX MOLYBDENUM CO CLIMAX MINE CLIMAX, CO 1061 140100020303 Mercury 2,866
IDG910006 ATLANTA GOLD CORPORATION OF AMERICA INC - ATLANTA GOLD PROJECT ATLANTA, ID 1041 Arsenic 2,279
CO0035394 MOUNT EMMONS MINING CO (WAS CLIMAX) CRESTED BUTTE, CO 1031 140200010204 Arsenic 2,276

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