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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 - Oil & Gas Extraction (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
Sulfide, total (as S) 63,023 84.2 84.2
Copper, total (as Cu) 4,885 6.53 90.8
Fluoride, total (as F) 829 1.108 91.9
Chloride (as Cl) 1,328  Original DMR load is 818 1.77 93.7
Benzo(a)pyrene 770 1.029 94.7
Molybdenum, potentially dissolved 711 0.95 95.6
Zinc, total (as Zn) 500 0.66 96.3
Barium, total (as Ba) 420 0.56 96.9
Mercury, total recoverable 373 0.49 97.4
Chrysene 237 0.31 97.7

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
121102020107 Tule Lake 41.07

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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)
WY0000779 MAVERICK SPRING TANK BATTERY / WY-99-16 CODY, WY 1311 Sulfide 63,023
TX0002887 MONT BELVIEU FRACTIONATOR MONT BELVIEU, TX 1311 120402030105 Copper 4,883
NY0004278 INERGY MIDSTREAM LLC. SAVONA, NY 4925 020501050206 Chloride 812
MT0030724 TONGUE RIVER PROJECT DECKER, MT 1311 100901010301 Fluoride 781
CO0048712 LONE PINE FIELD DELTA, CO 1311 140200050114 Benzo[a]pyrene 770
CO0048816 LOGAN WASH MINE SITE DEBEQUE, CO 1311 Molybdenum 711
TX0002887 MONT BELVIEU FRACTIONATOR MONT BELVIEU, TX 1311 120402030105 Zinc 499
PA0101508 PA BRINE TRMT FAC FRANKLIN, PA 1389 050100030907 Barium 420
MT0030724 TONGUE RIVER PROJECT DECKER, MT 1311 100901010301 Mercury 373
CO0048712 LONE PINE FIELD DELTA, CO 1311 140200050114 Chrysene 237

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