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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 - Petroleum refining (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
Hexachlorobenzene 7,125,026 80.04 80.04
Benzo(a)pyrene 376,417  Original DMR load is 376,410 4.22 84.2
Indeno(1,2,3-cd)pyrene 280,416  Original DMR load is 280,415 3.15 87.4
2,3,7,8-Tetrachlorodibenzo-p-dioxin 273,765 3.075 90.4
Chrysene 114,246  Original DMR load is 114,245 1.28 91.7
Benzo(a)anthracene 113,473  Original DMR load is 113,472 1.27 93.05
Benzo(k)fluoranthene 112,556  Original DMR load is 112,554 1.26 94.3
Benzo(b)fluoranthene 112,301  Original DMR load is 112,299 1.26 95.5
Sulfide, total (as S) 78,724 0.88 96.4
Methylmercury 77,315 0.86 97.3

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
110901060107 Rock Creek 8,004,284
180500020801 San Pablo Bay Islands 79,221
020402020607 Repaupo Creek-Delaware River 44,903
020402050703 Red Lion Creek-Delaware River 38,394
020301040204 Morses Creek-Arthur Kill 23,682
080802060302 Bayou Verdine-Calcasieu River 12,967
020402031008 City of Philadelphia-Schuylkill River 8,353
080802060303 Calcasieu River-Prien Lake 7,186
071200040905 Des Plaines River 5,715
121102020107 Tule Lake 5,416

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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)
TX0009148 BORGER REFINERY BORGER, TX 2911 110901060107 Hexachlorobenzene 7,109,178
TX0009148 BORGER REFINERY BORGER, TX 2911 110901060107 Benzo[a]pyrene 367,409
MA0000833 EXXONMOBIL EVERETT TERMINAL EVERETT, MA 5171 010900010502 Indeno[1,2,3-cd]pyrene 280,021
CA0004961 TESORO GOLDEN EAGLE REFINERY MARTINEZ, CA 2911 2,3,7,8-Tetrachlorodibenzo-p-dioxin 273,723
TX0009148 BORGER REFINERY BORGER, TX 2911 110901060107 Chrysene 113,186
TX0009148 BORGER REFINERY BORGER, TX 2911 110901060107 Benz[a]anthracene 112,018
TX0009148 BORGER REFINERY BORGER, TX 2911 110901060107 Benzo(b)fluoranthene 111,909
TX0009148 BORGER REFINERY BORGER, TX 2911 110901060107 Benzo[k]fluoranthene 111,909
CA0005134 CHEVRON RICHMOND REFINERY RICHMOND, CA 2911 180500020801 Methylmercury 77,020
TX0009148 BORGER REFINERY BORGER, TX 2911 110901060107 Acrylonitrile 41,428

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