Jump to main content or area navigation.

Contact Us

Discharge Monitoring Report (DMR) Pollutant Loading Tool

The Loading Tool is being transitioned into ECHO to increase user access to data and streamline site maintenance. The beta version is now available for testing. EPA plans to retire this site in late November 2017. Current site functionality will be available in ECHO.

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 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.

Point Source Category Information - Steam electric power generating (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) (2017)
Pollutant Name Total DMR TWPE (lb-eq/yr) % of Category TWPE Cumulative % of
Category TWPE
Heptachlor epoxide 2,167,676 57.04 57.04
Aluminum 605,198 15.9 72.9
Boron 150,384 3.95 76.9
Arsenic 130,519 3.43 80.3
Total Residual Chlorine 114,423 3.011 83.3
Copper 109,070  Original DMR load is 109,070 2.87 86.2
Chloride 94,695  Original DMR load is 94,695 2.49 88.7
Iron 68,622 1.805 90.5
Fluoride 67,438 1.77 92.3
Manganese 57,285 1.507 93.8

Download All Data

Top Receiving Watersheds (2017)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
180701040500 Manhattan Beach-Frontal Santa Monica Bay 2,188,519
051201081602 Dry Branch-Wabash River 345,010
051202021001 Lick Creek-White River 107,734
041300010603 Keg Creek-Frontal Lake Ontario 101,015
051402011203 Cowhide Slough-Ohio River 90,915
180701060606 Coyote Creek-San Gabriel River 42,193
011000030305 Fenger Brook-Frontal Lond Island Sound 32,319
051201140504 Weather Creek 32,133
180701060702 Alamitos Bay 30,500
071200040706 Goose Lake-Des Plaines River 29,040

Download All Data

Top Facility Discharges in Toxic-Weighted Pounds (TWPE) (2017)
NPDES ID Facility Name City, State SIC Code HUC-12 Code Top Pollutant Top Pollutant TWPE (lb-eq/yr)
CA0001201 AES REDONDO BEACH, LLC REDONDO BEACH, CA 4911 180701040500 Heptachlor epoxide 2,167,676
IN0002763 DUKE ENERGY INDIANA CAYUGA GEN STATN CAYUGA, IN 4911 051201081602 Aluminum 310,290
IN0002887 IPL PETERSBURG GENERATING STATION PETERSBURG, IN 4911 051202021001 Aluminum 91,148
NY0104213 AES SOMERSET LLC APPLETON, NY 4911 041300010603 Boron 77,261
TX0001066 STRYKER CREEK STEAM ELECTRIC STATION RUSK, TX 4911 120200040304 Aluminum 65,128
IN0002259 SIGECO F B CULLEY GENERATING STATION NEWBURGH, IN 4911 051402011203 Aluminum 58,963
FL0001031 JEA NORTHSIDE GENERATING STATION JACKSONVILLE, FL 4911 030801031603 Aluminum 55,771
TX0063681 SOMMERS, DEELY, SPRUCE SES SAN ANTONIO, TX 4911 121003010302 Chloride 54,612
IL0059064 COMMONWEALTH EDISON-MAYWOOD TECHNICAL CENTER MAYWOOD, IL 4911 071200040706 Polychlorinated biphenyls 29,040

Download All Data

Top of Page

About the Data Glossary Error Correction Contact Us

Jump to main content.