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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 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).

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 2,705  Original DMR load is 286,269 52.5 52.5
Formaldehyde 1,289 25.05 77.6
Total Residual Chlorine 597 11.6 89.2
Ammonia as N 299 5.81 95.03
Chloride 179 3.47 98.5
Nitrogen, nitrate dissolved 31.7 0.61 99.1
Ozone 21.7 0.42 99.5
Ammonia as NH3 15.6 0.303 99.8
Lead 4.67 0.0909 99.9
Nitrite nitrogen, dissolved (as N) 1.203 0.023 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 1.29  Original DMR load is 283,566
170402120502 Town of Falls City 1,704
170402121105 Peters Gulch-Snake River 951
110100100207 Gut Creek-Spring River 491
041401020704 Orwell Creek-Salmon River 445
050100020405 Little Conewengo Creek 299
041300030406 Oatka Creek 267
121102030000 Upper Laguna Madre 74.1
041402020803 Scriba Creek 62.08
110100061003 Outlet Norfork Lake-North Fork River 60.6

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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 BOX CANYON TROUT FARM BUHL, ID 0921 170402121006 Copper 0  Original DMR load is 283,564
IDG130018 SEAPAC OF IDAHO PRISTINE SPRINGS FISH HATCHERY JEROME, ID 0921 170402120502 Copper 1,704
IDG130009 MAGIC SPRINGS HATCHERY HAGERMAN, ID 0921 170402121105 Copper 950
AR0002879 JIM HINKLE SPRING RIVER STATE FISH HATCHERY MAMMOTH SPRING, AR 0921 110100100207 Total Residual Chlorine 465
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 041504060102 Formaldehyde 161
TXG130009 GCCA CPL MARINE DEVELOPMENT CENTER CORPUS CHRISTI, TX 0921 121102030000 Total Residual Chlorine 74.02
NY0035343 CHATEAUGAY STATE FISH HATCHERY CHATEAUGAY, NY 0921 041503080201 Formaldehyde 62.8

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