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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 - Timber products processing (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
Chlorine, total residual 60,775 61.007 61.007
Copper, total (as Cu) 14,942 14.9 76.006
Arsenic, total recoverable 14,002 14.05 90.06
Pentachlorophenol 2,190 2.19 92.2
Arsenic, total (as As) 1,634 1.64 93.9
Copper, total recoverable 1,560 1.56 95.4
Iron, total (as Fe) 903 0.906 96.3
Benzo(a)pyrene 719 0.72 97.09
Nitrogen, ammonia total (as N) 689 0.69 97.7
Magnesium, total (as Mg) 408 0.409 98.1

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
040700030309 Grass Creek-Frontal Lake Huron 143

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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)
AL0055395 CAHABA TIMBER CO BRIERFIELD, AL 2421 031502020405 Total Residual Chlorine 60,637
WV0078719 ED AREY & SONS INC BUCKHANNON, WV 2491 Copper 14,347
AL0064742 FREE STATE LUMBER CO INC HALEYVILLE, AL 2421 060300060102 Arsenic 12,482
AL0055395 CAHABA TIMBER CO BRIERFIELD, AL 2421 031502020405 Pentachlorophenol 1,664
MTR000318 GEBHARDT POST PLANT & SAWMILL ROUNDUP, MT 2491 100402020401 Arsenic 1,461
FL0000876 BUCKEYE FLORIDA LP PERRY, FL 2493 031101020203 Ammonia as N 543
AL0068837 ALA-GA WOOD PRESERVING CO LAFAYETTE, AL 2491 031501090201 Copper 486
AL0055395 CAHABA TIMBER CO BRIERFIELD, AL 2421 031502020405 Benzo[a]pyrene 463
AL0062855 HUXFORD POLE AND TIMBER COMPANY HUXFORD, AL 2491 031403050101 Pentachlorophenol 454

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