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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 - Phosphate manufacturing (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
Fluoride 14,449  Original DMR load is 13,832 92.1 92.1
Aluminum 530 3.37 95.5
Nitrogen, nitrate dissolved 176 1.11 96.6
Sulfate 155  Original DMR load is 145 0.98 97.6
Cadmium 144 0.92 98.5
Ammonia as N 116  Original DMR load is 114 0.73 99.2
Arsenic 60.5 0.38 99.6
Mercury 17.8 0.11 99.7
Copper 16.3 0.104 99.8
Radium-226 12.2 0.078 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
030201040207 East Fork Pamlico River-Pamlico River 7,569
031001010302 McCullough Creek 3,787
031002040101 Skinned Sapling Creek 2,228  Original DMR load is 1,599
080901000101 Mississippi River-Bonnet Carre Spillway 1,512
120401040703 Vince Bayou-Buffalo Bayou 396
080702020801 Bayou Braud 175
071300011004 Senachwine Lake-Illinois River 14.3

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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)
NC0003255 AURORA MINE AURORA, NC 2874 030201040207 Fluoride 7,569
FL0001902 US AGRI-CHEMICALS CORP FORT MEADE, FL 031001010302 Fluoride 3,630
FL0000752 MOSAIC FERTILIZER LLC GREEN BAY PLANT BARTOW, FL 031002040101 Fluoride 1,492
LA0003638 MOSAIC FERTILIZER LLC - TAFT PLANT HAHNVILLE, LA 2874 080901000101 Fluoride 794
LA0003638 MOSAIC FERTILIZER LLC - TAFT PLANT HAHNVILLE, LA 2874 080901000101 Aluminum 530
TX0007285 AGRIFOS FERTILIZER L.L.C. PASADENA, TX 2874 120401040703 Fluoride 255
LA0003638 MOSAIC FERTILIZER LLC - TAFT PLANT HAHNVILLE, LA 2874 080901000101 Cadmium 131
FL0001902 US AGRI-CHEMICALS CORP FORT MEADE, FL 031001010302 Sulfate 126
TX0007285 AGRIFOS FERTILIZER L.L.C. PASADENA, TX 2874 120401040703 Arsenic 60.5

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