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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 - 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) 4,755 94.2 94.2
Fluoride, total (as F) 147 2.92 97.1
Chlorine, total residual 68.2 1.35 98.5
Selenium, total (as Se) 27.8 0.55 99.1
Silver, total (as Ag) 13.8 0.27 99.3
Cyanide, total (as CN) 13.7 0.27 99.6
Copper, total (as Cu) 10.8 0.21 99.8
Nickel, total (as Ni) 4.045 0.0802 99.9
Nitrogen, ammonia total (as N) 1.72 0.034 99.9
Chromium, total (as Cr) 1.00608 0.019 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
031601090104 Eightmile Creek 4,755
120401040401 Keegans Bayou-Brays Bayou 198
050200061101 Jacks Run 47.5
020503061107 Lower Conestoga River 43.5
010900010302 North River-Frontal Massachusetts Bay 0.101

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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, total (as Zn) 4,755
TX0003824 TEXAS INSTRUMENTS INC STAFFORD, TX 3674 120401040401 Fluoride, total (as F) 147
PA0001201 POWEREX INC YOUNGWOOD, PA 3674 050200061101 Chlorine, total residual 47.004
TX0003824 TEXAS INSTRUMENTS INC STAFFORD, TX 3674 120401040401 Selenium, total (as Se) 27.8
TX0003824 TEXAS INSTRUMENTS INC STAFFORD, TX 3674 120401040401 Chlorine, total residual 21.1
PA0008508 BURLE BUS PARK LP/LANCASTER LANCASTER, PA 3671 020503061107 Silver, total (as Ag) 13.8
PA0008508 BURLE BUS PARK LP/LANCASTER LANCASTER, PA 3671 020503061107 Cyanide, total (as CN) 13.7
PA0008508 BURLE BUS PARK LP/LANCASTER LANCASTER, PA 3671 020503061107 Copper, total (as Cu) 10.8
PA0008508 BURLE BUS PARK LP/LANCASTER LANCASTER, PA 3671 020503061107 Nickel, total (as Ni) 4.045
TX0003824 TEXAS INSTRUMENTS INC STAFFORD, TX 3674 120401040401 Nitrogen, ammonia total (as N) 1.16

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