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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 - Concentrated Aquatic Animal Production (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
Polychlorinated biphenyls (PCBs) 862,124 74.7 74.7
Copper, total recoverable 289,469 25.09 99.8
Formalin 1,287 0.11 99.9
Chlorine, total residual 292 0.025 99.9
Nitrogen, ammonia total (as N) 166 0.014 99.9
Chloride (as Cl) 141 0.012 99.9
Nitrogen, nitrate total (as N) 24.08 0.00208 99.9
Nitrogen, ammonia, total (as NH3) 10.4 0.000903 99.9
Lead, total recoverable 4.67 0.000405 99.9
Formaldehyde 2.071 0.00017 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
170402121006 Briggs Creek-Snake River 0.11

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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)
MTG130008 USFWS-ENNIS NAT FISH HATCHERY ENNIS, MT 0921 100200071202 Polychlorinated biphenyls 862,124
IDG130018 PRISTINE SPRINGS, INC. JEROME, ID 0921 Copper 1,724
NY0109053 SALMON RIVER FISH HATCHERY ALTMAR, NY 0921 041401020704 Formaldehyde 418
NY0035432 CALEDONIA FISH HATCHERY CALEDONIA, NY 0921 041300030406 Formaldehyde 263
NY0035459 RANDOLPH STATE FISH HATCHERY RANDOLPH, NY 0921 050100020405 Formaldehyde 244
NY0035335 ADIRONDACK FISH CULTURE STATION SARANAC LAKE, NY 0921 020100060102 Formaldehyde 161
TXG130017 UVALDE NATIONAL FISH HATCHERY UVALDE, TX 0921 121101060902 Total Residual Chlorine 109
TXG130009 GCCA/CPL MARINE DEVELOPMENT CORPUS CHRISTI, TX 0921 Total Residual Chlorine 74.02

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