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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 - Electrical and electronic components (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
Zinc, total (as Zn) 6,090 95.3 95.3
Fluoride, total (as F) 147 2.309 97.6
Chlorine, total residual 68.2 1.068 98.7
Selenium, total (as Se) 27.8 0.43 99.1
Silver, total (as Ag) 13.8 0.21 99.4
Cyanide, total (as CN) 13.7 0.21 99.6
Copper, total (as Cu) 10.8 0.16 99.8
Lead, total (as Pb) 5.74 0.089 99.8
Nickel, total (as Ni) 4.045 0.063 99.9
Nitrogen, ammonia total (as N) 1.72 0.027 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
050200061102 Upper Sewickley Creek 47.5
020503061107 Lower Conestoga River 43.5

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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)
AL0066958 LOPAREX LLC CULLMAN, AL 3671 031601090104 Zinc 6,090
TX0003824 TEXAS INSTRUMENTS INC STAFFORD, TX 3674 Fluoride 147
PA0001201 POWEREX INC YOUNGWOOD, PA 3674 050200061102 Total Residual Chlorine 47.004
TX0003824 TEXAS INSTRUMENTS INC STAFFORD, TX 3674 Selenium 27.8
TX0003824 TEXAS INSTRUMENTS INC STAFFORD, TX 3674 Total Residual Chlorine 21.1
PA0008508 BURLE BUS PARK LP/LANCASTER LANCASTER, PA 3671 020503061107 Silver 13.8
PA0008508 BURLE BUS PARK LP/LANCASTER LANCASTER, PA 3671 020503061107 Cyanide 13.7
PA0008508 BURLE BUS PARK LP/LANCASTER LANCASTER, PA 3671 020503061107 Copper 10.8
SC0036145 MEMC ELECTRONIC MATERIALS INCORPORATED MOORE, SC 3674 030501070305 Lead 5.72
PA0008508 BURLE BUS PARK LP/LANCASTER LANCASTER, PA 3671 020503061107 Nickel 4.045

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