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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 - Coal mining (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
Mercury, total (as Hg) 50,919 26.9 26.9
Iron, total recoverable 45,232 23.9 50.9
Sulfate, total (as SO4) 42,363 22.4 73.3
Manganese, total (as Mn) 22,301 11.8 85.1
Iron, total (as Fe) 11,856 6.28 91.4
Chlorine, total residual 4,264 2.25 93.7
Selenium, total recoverable 2,320 1.22 94.9
Chloride (as Cl) 1,824 0.96 95.9
Aluminum, total (as Al) 1,813 0.96 96.8
Magnesium, dissolved (as Mg) 1,747 0.92 97.8

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
020700020201 Shields Run-North Branch Potomac River 4,069
050200010304 Tenmile Creek-Buckhannon River 2,179
100901010501 Tongue River-Pearson Creek 1,794
050400040301 Robinson Run-Muskingum River 1,446
050302020901 Kyger Creek 587

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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)
CO0000221 SENECA MINE - SENECA COAL CO HAYDEN, CO 1221 140500010509 Iron 44,900
IL0074802 PEABODY MIDWEST MINING, LLC RIDGE FARM, IL 1222 051201081004 Sulfate 41,682
IL0055824 ALPENA VISION RESOURCES-SPARTAN MINE SPARTA, IL 1221 071402040702 Mercury 39,896
CO0027154 TWENTYMILE COAL COMPANY OAK CREEK, CO 1222 140500010504 Iron 6,993
IL0059749 NUBAY MINING LLC GALATIA, IL 1222 Manganese 6,569
IL0060674 KINDER MORGAN BULK TERMINALS ROCKWOOD, IL 1221 071401050306 Mercury 6,073
TX0086541 TEXAS WESTMORELAND COAL CO JEWETT, TX 1221 120302010502 Manganese 2,851
KY0040495 CZAR COAL CORP PEVLER PREP PLT DAVELLA, KY 1241 050702010605 Total Residual Chlorine 2,743
WV0050717 ENOXY COAL CO TALLMANSVILLE, WV 1221 050200010304 Selenium 1,885

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