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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 - Independent and Stand Alone Labs (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
Chlorine, total residual 227 30.4 30.4
Lead, total (as Pb) 200 26.8 57.3
Copper, total (as Cu) 93.5 12.5 69.9
Copper, total recoverable 48.7 6.55 76.5
Silver, total (as Ag) 39.2 5.27 81.7
Mercury, total (as Hg) 28.02 3.76 85.5
Cadmium, total recoverable 22.7 3.061 88.6
2,2-Dibromo-3-nitrilopropionamide 10.6 1.43 90.05
Cadmium, total (as Cd) 10.6 1.43 91.4
Polychlorinated biphenyls (PCBs) 9.68 1.302 92.7

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
020302020501 Upper Peconic River 111
041201040604 City of North Tonawanda-Niagara River 58.3

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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)
NY0007030 GE GLOBAL RESEARCH NISKAYUNA, NY 8731 020200041109 Lead 193
NY0001201 ISLECHEM LLC GRAND ISLAND, NY 8731 041201040604 Total Residual Chlorine 58.3
OK0043931 US FAA MIKE MONRONEY AERONAUTICAL CENTER OKLAHOMA CITY, OK 8731 Total Residual Chlorine 51.1
CT0090182 NATIONAL MARINE FISHERIES MILFORD, CT 8731 020302030000 Total Residual Chlorine 47.06
NJ0140155 LUCENT TECHNOLOGIES INC MURRAY HILLS, NJ 8731 020301050504 Copper 45.03
NY0007030 GE GLOBAL RESEARCH NISKAYUNA, NY 8731 020200041109 Total Residual Chlorine 42.9
NY0005835 U.S. DOE BROOKHAVEN NATL. LAB. - BROOKHAVEN SCIENCE ASSOCIATES UPTON, NY 8731 020302020501 Silver 39.2
NY0007030 GE GLOBAL RESEARCH NISKAYUNA, NY 8731 020200041109 Copper 36.1
NY0005835 U.S. DOE BROOKHAVEN NATL. LAB. - BROOKHAVEN SCIENCE ASSOCIATES UPTON, NY 8731 020302020501 Copper 35.2
NH0022055 ENVIROSYSTEMS HAMPTON, NH 8734 010700060903 Cadmium 22.7

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