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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 - 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) 543,821 99.6 99.6
Aluminum, total (as Al) 530 0.097 99.7
Radium 226, total 480 0.088 99.8
Sulfate, total (as SO4) 187 0.034 99.9
Nitrogen, nitrate total (as N) 176 0.032 99.9
Cadmium, total (as Cd) 144 0.026 99.9
Nitrogen, ammonia total (as N) 83.3 0.015 99.9
Arsenic, total (as As) 60.5 0.011 99.9
Mercury, total (as Hg) 17.8 0.0032 99.9
Copper, total (as Cu) 16.3 0.0029 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
080701000105 Claiborne Island 534,261
080903010206 Bayou Fortier 1,511
120401040703 Vince Bayou-Buffalo Bayou 396
080702020801 Bayou Braud 175
031002050205 Indian Creek-Hillsborough River 47.3

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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)
LA0004847 MOSAIC FERTILIZER LLC UNCLE SAM PLANT UNCLE SAM, LA 2874 080701000105 Fluoride 533,623
NC0003255 PCS PHOSPHATE CO INC AURORA, NC 2874 Fluoride 7,569
FL0000752 MOSAIC FERTILIZER LLC GREEN BAY PLANT BARTOW, FL 2874 Fluoride 1,492
LA0003638 MOSAIC FERTILIZER, LLC- TAFT PLANT HAHNVILLE, LA 2874 080903010206 Fluoride 794
LA0003638 MOSAIC FERTILIZER, LLC- TAFT PLANT HAHNVILLE, LA 2874 080903010206 Aluminum 530
LA0004847 MOSAIC FERTILIZER LLC UNCLE SAM PLANT UNCLE SAM, LA 2874 080701000105 Radium-226 470
TX0007285 AGRIFOS FERTILIZER PASADENA PASADENA, TX 2874 120401040703 Fluoride 255
LA0066257 PCS NITROGEN FERTILIZER LP GEISMAR, LA 2874 080702020801 Nitrogen, nitrate dissolved 175
LA0004847 MOSAIC FERTILIZER LLC UNCLE SAM PLANT UNCLE SAM, LA 2874 080701000105 Sulfate 169
LA0003638 MOSAIC FERTILIZER, LLC- TAFT PLANT HAHNVILLE, LA 2874 080903010206 Cadmium 131

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