Jump to main content or area navigation.

Contact Us

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).

EPA is working to resolve a problem with linkages in EPA's Facility Registry Service (FRS) for Clean Water Act permits. Read More...

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) 63,287 83.8 83.8
Copper, total (as Cu) 4,891 6.48 90.3
Chloride (as Cl) 2,219  Original DMR load is 2,199 2.94 93.2
Fluoride, total (as F) 829 1.098 94.3
Manganese, total recoverable 775 1.026 95.4
Molybdenum, potentially dissolved 711 0.94 96.3
Radium 226, total 701 0.92 97.2
Zinc, total (as Zn) 505 0.66 97.9
Silver total recoverable 463 0.61 98.5
Barium, total (as Ba) 420 0.55 99.1

Download All Data

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
020501050206 Knight Creek-Cohocton River 812
100800150104 Lower Soap Creek 285
100800020204 Bighorn Draw 205
100800050102 Maverick Spring-Fivemile Creek 126
041402010801 Hector Falls Creek-Seneca Lake 102
080903020804 Bayou Blue-Larose 88.5
121102020107 Tule Lake 67.7

Download All Data

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, total (as S) 63,023
TX0002887 TARGA RESOURCES - MONT BELVIEU FRACTIONATOR MONT BELVIEU, TX 1311 120402030105 Copper, total (as Cu) 4,883
PA0101508 PA BRINE TRMT FAC FRANKLIN, PA 1389 050100030907 Chloride (as Cl) 1,094
NY0004278 INERGY MIDSTREAM LLC. SAVONA, NY 4925 020501050206 Chloride (as Cl) 812
MT0030724 FIDELITY - TONGUE RIVER PROJECT WTF DECKER, MT 1311 100901010301 Fluoride, total (as F) 781
AKG315002 HILCORP ALASKA, INC. - TRADING BAY TREATMENT FACILITY COOK INLET, AK 1311 Not found Manganese, total recoverable 749
CO0048816 LOGAN WASH MINE SITE DEBEQUE, CO 1311 Molybdenum, potentially dissolved 711
TX0002887 TARGA RESOURCES - MONT BELVIEU FRACTIONATOR MONT BELVIEU, TX 1311 120402030105 Zinc, total (as Zn) 499
AKG315002 HILCORP ALASKA, INC. - TRADING BAY TREATMENT FACILITY COOK INLET, AK 1311 Not found Silver total recoverable 441
PA0101508 PA BRINE TRMT FAC FRANKLIN, PA 1389 050100030907 Barium, total (as Ba) 420

Download All Data

Top of Page

About the Data Glossary Error Correction Contact Us

Jump to main content.