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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
Copper, total recoverable 289,464 99.9 99.9
Nitrogen, ammonia total (as N) 48.8 0.016 99.9
Nitrogen, nitrate total (as N) 22.7 0.0078 99.9
Chlorine, total residual 5.0078 0.0017 99.9
Formalin 2.25 0.00077 99.9
Nitrate nitrogen, dry weight 0.41 0.00014 99.9
Iron, total recoverable 0.302 0.000104 99.9
Nitrogen, nitrite total (as N) 0.17 5.89E-005 99.9
Formaldehyde 0.1006 3.47E-005 99.9
Nitrogen, ammonia, total (as NH3) 0.048 1.67E-005 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 286,752
170402120502 Town of Falls City 1,724
170402121105 Peters Gulch-Snake River 961
170402120704 Sucker Flat-Snake River 0.5002
170402120503 City of Twin Falls 0.15
170402121104 Billingsley Creek 0.11
170402121303 Birch Creek-Snake River 0.063
170402121005 Mud Creek 0.049

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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)
IDG130014 CLEAR SPRINGS FOODS INCORPORATED BUHL, ID 0921 170402121006 Copper 286,750
IDG130018 PRISTINE SPRINGS, INC. JEROME, ID 0921 170402120502 Copper 1,724
IDG130009 MAGIC SPRINGS HATCHERY HAGERMAN, ID 0921 170402121105 Copper 961
IDG130054 BRIGGS CREEK WEST BUHL, ID 0921 170402121006 Copper 29.4
SC0000451 SCDNR/WALHALLA FISH HATCHERY MOUNTAIN REST, SC 0921 030601020204 Ammonia as N 14.06
NJ0033189 NJDEP PEQUEST STATE FISH HATCHERY OXFORD, NJ 0921 020401050204 Nitrogen, nitrate dissolved 12.7
SD0000060 SD GFP CLEGHORN FISH HATCHERY RAPID CITY, SD 0921 101201100202 Nitrogen, nitrate dissolved 9.65
NH0000752 NEW HAMPTON TROUT HATCHERY NEW HAMPTON, NH 0921 010700010801 Ammonia as N 9.49
NH0000710 POWDER MILL FISH HATCHERY NEW DURHAM, NH 0921 010700020102 Ammonia as N 6.63
NH0110001 MILFORD FISH HATCHERY MILFORD, NH 0921 010700060904 Ammonia as N 5.62

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