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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 - 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 63,287 81.6 81.6
Copper 4,936 6.36 88.01
Chloride 2,201  Original DMR load is 2,156 2.84 90.8
Total Residual Chlorine 1,612 2.079 92.9
Fluoride 829 1.069 94.008
Manganese 776 1.0014 95.009
Molybdenum 711 0.91 95.9
Radium-226 702 0.905 96.8
Zinc 629 0.81 97.6
Silver 464 0.59 98.2

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
120402030105 Ellis Branch-Cedar Bayou 5,382
050100030907 Lower Twomile Run-Allegheny River 1,537
100901010301 Tongue River-Beatty Gulch 860
020501050207 Smith Run-Cohocton River 812
051202011202 Bean Creek-Pleasant Run 329
100800150104 Lower Soap Creek 285
100800020204 Bighorn Draw 205
110200100501 Berwind Arroyo 133
100800050102 Maverick Spring-Fivemile Creek 126
101800010204 Lower North Fork North Platte River 95.5

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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 TARGA RESOURCES - MONT BELVIEU FRACTIONATOR MONT BELVIEU, TX 1311 120402030105 Copper 4,883
UTG790028 DRY CANYON COMPRESSOR STATION CARBON COUNTY, UT 1389 140600050404 Total Residual Chlorine 1,517
PA0101508 AQUATECH FLUID RECOVERY SERVICES - FRANKLIN FACILITY FRANKLIN, PA 1389 050100030907 Chloride 1,094
NY0004278 INERGY MIDSTREAM LLC. SAVONA, NY 4925 020501050207 Chloride 812
MT0030724 FIDELITY - TONGUE RIVER PROJECT WTF DECKER, MT 1311 100901010301 Fluoride 781
AKG315002 TRADING BAY PRODUCTION FACILITY ILIAMNA, AK 1311 Not found Manganese 749
CO0048816 LOGAN WASH MINE SITE DEBEQUE, CO 1311 140100051006 Molybdenum 711
TX0002887 TARGA RESOURCES - MONT BELVIEU FRACTIONATOR MONT BELVIEU, TX 1311 120402030105 Zinc 499
AKG315002 TRADING BAY PRODUCTION FACILITY ILIAMNA, AK 1311 Not found Silver 441

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