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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 - 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 35.09 35.09
2,3,7,8-Tetrachlorodibenzo-p-dioxin 273,723 34.2 69.3
Methylmercury 77,315 9.67 79.02
Sulfide 62,887 7.87 86.8
Polychlorinated biphenyls 22,032 2.75 89.6
Selenium 14,818 1.85 91.5
Aluminum 13,384 1.67 93.1
Total Residual Chlorine 10,670 1.33 94.5
Benzo[a]pyrene 8,178 1.023 95.5
Fluoride 7,194 0.9002 96.4

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
180500010401 Suisun Bay Estuaries 274,430
180500021002 Richardson Bay-San Francisco Bay 79,221
020402020607 Repaupo Creek-Delaware River 43,343
080802060302 Bayou Verdine-Calcasieu River 12,967
121102020107 Tule Lake 7,422
080802060303 Calcasieu River-Prien Lake 7,186
120401040703 Vince Bayou-Buffalo Bayou 6,873
080701000105 Claiborne Island 5,444
180701040500 Manhattan Beach-Frontal Santa Monica Bay 4,663
020402031008 City of Philadelphia-Schuylkill River 4,336

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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 GOLDEN EAGLE REFINERY MARTINEZ, CA 2911 180500010401 2,3,7,8-Tetrachlorodibenzo-p-dioxin 273,723
CA0005134 CHEVRON RICHMOND REFINERY RICHMOND, CA 2911 180500021002 Methylmercury 77,020
PA0012637 MONROE ENERGY TRAINER REFINERY TRAINER, PA 2911 020402020607 Polychlorinated biphenyls 21,756
PA0012637 MONROE ENERGY TRAINER REFINERY TRAINER, PA 2911 020402020607 Aluminum 11,426
PA0012637 MONROE ENERGY TRAINER REFINERY TRAINER, PA 2911 020402020607 Total Residual Chlorine 6,766
LA0003026 PHILLIPS 66 LAKE CHARLES REFINERY WESTLAKE, LA 2911 080802060302 Benzo[a]pyrene 6,478
LA0005941 CITGO PETROLEUM CORP LAKE CHARLES, LA 2911 080802060303 Sulfide 5,977
LA0045683 MARATHON PETROLEUM CO LP GARYVILLE, LA 2911 080701000105 Sulfide 4,493
MN0000418 FLINT HILLS RESOURCES PINE BEND LLC ROSEMOUNT, MN 2911 070102060903 Selenium 4,217

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