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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 p, 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
Indeno(1,2,3-cd)pyrene 280,403 37.3 37.3
2,3,7,8-Tetrachlorodibenzo-p-dioxin 218,979 29.1 66.4
Methylmercury 77,315 10.2 76.7
Sulfide, total (as S) 61,316 8.15 84.8
Chlorine, total residual 37,180 4.94 89.8
Aluminum, total (as Al) 13,334 1.77 91.6
Selenium, total (as Se) 10,245 1.36 92.9
Fluoride, total (as F) 8,568 1.13 94.1
Benzo(a)pyrene 8,183 1.088 95.2
Selenium, total recoverable 5,458 0.72 95.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
180500020801 San Pablo Bay Islands 79,221
020402050703 Red Lion Creek-Delaware River 26,945
020402020607 Repaupo Creek-Delaware River 21,587
080802060302 Bayou Verdine-Calcasieu River 10,429
071401010207 Burrough's Branch-Cahokia Creek 9,576
080702040302 Hope Canal-Pipeline Canal 4,500
121102020107 Tule Lake 4,420
080901000101 Mississippi River-Bonnet Carre Spillway 4,336
020402031008 City of Philadelphia-Schuylkill River 4,257
070102060903 Spring Lake-Mississippi River 4,226

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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)
MA0000833 EXXONMOBIL EVERETT TERMINAL EVERETT, MA 5171 010900010502 Indeno[1,2,3-cd]pyrene 280,020
CA0004961 TESORO REFINING & MARKETING CO MARTINEZ, CA 2911 2,3,7,8-Tetrachlorodibenzo-p-dioxin 218,979
CA0005134 CHEVRON PRODS.CO. RICHMOND REFY RICHMOND, CA 2911 180500020801 Methylmercury 77,020
DE0000256 DELAWARE CITY REFINERY DELAWARE CITY, DE 2911 020402050703 Total Residual Chlorine 26,470
PA0012637 CONOCOPHILLIPS TRAINER REF TRAINER, PA 2911 020402020607 Aluminum 11,426
IL0000205 WOOD RIVER REFINERY ROXANA, IL 2911 071401010207 Sulfide 7,806
PA0012637 CONOCOPHILLIPS TRAINER REF TRAINER, PA 2911 020402020607 Total Residual Chlorine 6,766
LA0003026 CONOCO PHILLIPS LAKE CHARLES REFINERY WESTLAKE, LA 2911 080802060302 Benzo[a]pyrene 6,478
LA0045683 MARATHON PETROLEUM CO LP GARYVILLE, LA 2911 080702040302 Sulfide 4,493
MN0000418 FLINT HILLS RESOURCES PINE BEND LLC ROSEMOUNT, MN 2911 070102060903 Selenium 4,217

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