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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 - Transportation Equipment Cleaning (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
Chromium, Hexavalent 634 28.5 28.5
Chloride 298 13.4 41.9
Manganese 195 8.79 50.7
Iron 176 7.92 58.6
Copper 162 7.31 65.9
Total Residual Chlorine 145 6.52 72.5
Aluminum 144 6.49 79.0006
Arsenic 127 5.706 84.7
Cadmium 103 4.65 89.3
Chromium 92.2 4.15 93.5

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
020600031204 Stoney Creek-Patapsco River-Chesapeake Bay 728
051401010605 Lentizier Creek-Ohio River 461
020600031203 Northwest Harbor-Patapsco River 166
020301040204 Morses Creek-Arthur Kill 162
020600031202 Curtis Creek-Curtis Bay 133
080202040712 Lower Belle Fountain Ditch 82.2
051402010804 Lower Pup Creek 77.3
051401010301 Locust Creek-Ohio River 71.8
041201010606 Town of North Kingsville-Frontal Lake Erie 47.3
041201010605 Marsh Run-Conneaut Creek 34.2

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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)
MD0066818 MPA-DMT-GROUNDWATER TREATMENT PLANT BALTIMORE, MD 4491 020600031204 Chromium, Hexavalent 634
KY0097241 RIVER ROAD TERMINAL INC LOUISVILLE, KY 4491 051401010605 Chloride 272
MD0057371 CSX TRANSPORTATION - CURTIS BAY PIERS BALTIMORE, MD 4491 020600031202 Copper 132
MDDRG3650 MASONVILLE DREDGED MATERIAL CONTAINMENT FACILITY BALTIMORE, MD 4499 020600031203 Arsenic 126
KY0097241 RIVER ROAD TERMINAL INC LOUISVILLE, KY 4491 051401010605 Manganese 113
TX0100242 FISHING HARBOR WWTP BROWNSVILLE, TX 4491 121102080900 Total Residual Chlorine 107
NY0200484 CLEAN WATER OF NEW YORK INC STATEN ISLAND, NY 7699 020301040204 Cadmium 101
MD0066818 MPA-DMT-GROUNDWATER TREATMENT PLANT BALTIMORE, MD 4491 020600031204 Chromium 91.5
KY0097241 RIVER ROAD TERMINAL INC LOUISVILLE, KY 4491 051401010605 Iron 75.3
KY0102920 NUGENT SAND CO MILTON, KY 4491 051401010301 Aluminum 54.4

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