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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 - Cement 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
Cadmium, total (as Cd) 2,373 24.7 24.7
Potassium, total (as K) 1,751 18.2 43.02
Silver, total (as Ag) 1,456 15.1 58.2
Mercury, total (as Hg) 1,278 13.3 71.5
Arsenic, total (as As) 879 9.16 80.7
Lead, total (as Pb) 822 8.57 89.2
Selenium, total (as Se) 283 2.95 92.2
Copper, total (as Cu) 257 2.68 94.9
Chromium, total (as Cr) 116 1.209 96.1
Zinc, total (as Zn) 114 1.19 97.3

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
040601050701 McGeach Creek-Frontal Grand Traverse Bay 1,701
040700030309 Grass Creek-Frontal Lake Huron 1,241
020200060402 Onesquethaw Creek 21.3

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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)
TXG110573 LONE STAR STONE OF TEXAS WHITNEY, TX 3272 Cadmium 2,112
MI0001988 LAFARGE MIDWEST INC ALPENA, MI 3241 040700030309 Potassium 1,237
TXG110573 LONE STAR STONE OF TEXAS WHITNEY, TX 3272 Silver 1,204
MI0003158 ST MARYS CEMENT INC (US) CHARLEVOIX, MI 3241 040601050701 Mercury 1,089
TXG110573 LONE STAR STONE OF TEXAS WHITNEY, TX 3272 Arsenic 738
TXG110573 LONE STAR STONE OF TEXAS WHITNEY, TX 3272 Lead 527
MI0003158 ST MARYS CEMENT INC (US) CHARLEVOIX, MI 3241 040601050701 Potassium 514
TXG110796 GATE PRECAST HILLSBORO, TX 3272 120301080104 Lead 244
TXG110573 LONE STAR STONE OF TEXAS WHITNEY, TX 3272 Selenium 205
TXG110573 LONE STAR STONE OF TEXAS WHITNEY, TX 3272 Copper 181

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