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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 p, 7K).

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, total (as F) 13,461 90.7 90.7
Aluminum, total (as Al) 530 3.57 94.3
Nitrogen, nitrate total (as N) 176 1.18 95.5
Nitrogen, ammonia total (as N) 163 1.101 96.6
Cadmium, total (as Cd) 144 0.97 97.6
Arsenic, total (as As) 112 0.75 98.3
Copper, total recoverable 72.5 0.48 98.8
Zinc, total (as Zn) 64.8 0.43 99.2
Cadmium, total recoverable 28.6 0.19 99.4
Mercury, total (as Hg) 17.8 0.12 99.6

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
080903010206 Bayou Fortier 1,500
080702020801 Bayou Braud 175
031002050205 Indian Creek-Hillsborough River 47.3
031001010306 Bear Branch-Peace River 37.5
031002040104 12.4
031002040201 Hookers Prairie 8.49

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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 PCS PHOSPHATE COMPANY INCORPORATED AURORA, NC 2874 Fluoride 11,275
MS0003115 MISSISSIPPI PHOSPHATES CORPORATION PASCAGOULA, MS 2874 Fluoride 993
LA0003638 MOSAIC FERTILIZER, LLC- TAFT PLANT HAHNVILLE, LA 2874 080903010206 Fluoride 794
LA0003638 MOSAIC FERTILIZER, LLC- TAFT PLANT HAHNVILLE, LA 2874 080903010206 Aluminum 530
TX0007285 AGRIFOS FERTILIZER PASADENA PASADENA, TX 2874 120401040703 Fluoride 255
LA0066257 PCS NITROGEN FERTILIZER LP GEISMAR, LA 2874 080702020801 Nitrogen, nitrate dissolved 175
LA0003638 MOSAIC FERTILIZER, LLC- TAFT PLANT HAHNVILLE, LA 2874 080903010206 Cadmium 131
MS0003115 MISSISSIPPI PHOSPHATES CORPORATION PASCAGOULA, MS 2874 Ammonia as N 122
AL0022021 AGRIUM US INC FLORENCE, AL 2874 Copper 63.3
AL0022021 AGRIUM US INC FLORENCE, AL 2874 Zinc 62.7

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