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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 2,601,211 55.9 55.9
Aluminum 667,518 14.3 70.2
Boron 275,820 5.93 76.2
Arsenic 183,590 3.94 80.1
Total Residual Chlorine 152,467 3.27 83.4
Copper 143,353  Original DMR load is 143,353 3.082 86.5
Chloride 113,855  Original DMR load is 113,855 2.44 88.9
Iron 84,634 1.81 90.7
Fluoride 80,799 1.73 92.5
Manganese 66,778 1.43 93.9

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Top Receiving Watersheds (2017)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
180701040500 Manhattan Beach-Frontal Santa Monica Bay 2,626,254
051201081602 Dry Branch-Wabash River 373,607
011000030305 Fenger Brook-Frontal Lond Island Sound 137,348
051202021001 Lick Creek-White River 119,233
041300010603 Keg Creek-Frontal Lake Ontario 116,983
051402011203 Cowhide Slough-Ohio River 99,361
180701060606 Coyote Creek-San Gabriel River 50,625
051201140504 Weather Creek 38,560
180701060702 Alamitos Bay 37,594
051201111601 Turtle Creek Lake-Turtle Creek 35,743

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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 2,601,211
IN0002763 DUKE ENERGY INDIANA CAYUGA GEN STATN CAYUGA, IN 4911 051201081602 Aluminum 334,720
IN0002887 IPL PETERSBURG GENERATING STATION PETERSBURG, IN 4911 051202021001 Aluminum 99,995
CT0003263 MILLSTONE POWER STATION WATERFORD, CT 4911 011000030305 Boron 98,339
NY0104213 AES SOMERSET LLC APPLETON, NY 4911 041300010603 Boron 89,459
TX0001066 STRYKER CREEK STEAM ELECTRIC STATION RUSK, TX 4911 120200040304 Aluminum 70,654
FL0001031 JEA NORTHSIDE GENERATING STATION JACKSONVILLE, FL 4911 030801031603 Aluminum 66,925
TX0063681 SOMMERS, DEELY, SPRUCE SES SAN ANTONIO, TX 4911 121003010302 Chloride 66,178
IN0002259 SIGECO F B CULLEY GENERATING STATION NEWBURGH, IN 4911 051402011203 Aluminum 64,705

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