Jump to main content or area navigation.

Contact Us

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 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.

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 16,238  Original DMR load is 15,720 92.5 92.5
Aluminum 537 3.064 95.6
Sulfate 213  Original DMR load is 208 1.21 96.8
Nitrogen, nitrate dissolved 176 1.00105 97.8
Cadmium 142 0.81 98.6
Ammonia as N 123  Original DMR load is 118 0.701 99.3
Arsenic 52.01 0.29 99.6
Mercury 16.7 0.095 99.7
Copper 16.4 0.093 99.8
Radium-226 12.2 0.07009 99.9

Download All Data

Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
030201040207 East Fork Pamlico River-Pamlico River 7,569
031001010305 Whidden Creek 3,787
031002040104 2,126  Original DMR load is 1,599
080903010206 Bayou Fortier 1,510
031002040202 Mined Area-Alafia River 1,240
031002040101 Skinned Sapling Creek 425
120401040703 Vince Bayou-Buffalo Bayou 386
080702020801 Bayou Braud 175
031002040201 Hookers Prairie 143
031002050205 Indian Creek-Hillsborough River 47.3

Download All Data

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 U S AGRI-CHEMICALS CORPORATION - FT MEADE CHEMICAL PLANT FORT MEADE, FL 2874 031001010305 Fluoride 3,630
FL0000752 MOSAIC FERTILIZER LLC GREEN BAY PLANT BARTOW, FL 2874 031002040104 Fluoride 1,492
FL0036421 MOSAIC FERTILIZER LLC - NEW WALES PLANT MULBERRY, FL 2874 031002040202 Fluoride 1,207
LA0003638 MOSAIC FERTILIZER LLC - TAFT PLANT HAHNVILLE, LA 2874 080903010206 Fluoride 794
LA0003638 MOSAIC FERTILIZER LLC - TAFT PLANT HAHNVILLE, LA 2874 080903010206 Aluminum 530
FL0001589 MOSAIC FERTILIZER - BARTOW PLANT BARTOW, FL 2874 031002040101 Fluoride 412
TX0007285 AGRIFOS FERTILIZER L.L.C. PASADENA, TX 2874 120401040703 Fluoride 255
LA0066257 PCS NITROGEN FERTILIZER LP - GEISMAR AGRICULTURAL NITROGEN & PHOSPHATE PLANT GEISMAR, LA 2874 080702020801 Nitrogen, nitrate dissolved 175
LA0003638 MOSAIC FERTILIZER LLC - TAFT PLANT HAHNVILLE, LA 2874 080903010206 Cadmium 129

Download All Data

Top of Page

About the Data Glossary Error Correction Contact Us

Jump to main content.