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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 - Construction and Development (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
Arsenic, total recoverable 2,575 26.7 26.7
Ammonia (as N) + unionized ammonia 1,887 19.5 46.3
Chlorine, total residual 1,303 13.5 59.8
Cadmium, total recoverable 633 6.57 66.4
Mercury, total (as Hg) 593 6.15 72.5
Zinc, potentially dissolved 441 4.58 77.1
Lead, total recoverable 423 4.39 81.5
Copper, total recoverable 411 4.26 85.8
Nitrogen, ammonia total (as N) 250 2.59 88.4
Selenium, dissolved (as Se) 204 2.11 90.5

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
071401050503 Juden Creek-Mississippi River 1,832
102801030601 Headwaters East Locust Creek 700
110702070704 Headwaters Clear Creek 664
103002000603 Labadie Creek-Missouri River 85.4
103001021305 Niemans Creek-Missouri River 42.7
110702070105 Williams Creek 28.03
110100020301 Headwaters Wilsons Creek 25.05
102801021103 Lower Muddy Creek 21.3
102400120708 Wilkerson Creek 13.7
103001010506 Sni-A-Bar Creek 8.37

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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)
CA0055824 LA DEPARTMENT WATER & POWER CASTAIC, CA 1629 180701020305 Arsenic 2,575
MO0101729 BIOKYOWA INC CAPE GIRARDEAU , MO 1629 071401050503 Ammonia as NH3 1,832
MO0115487 FARMLAND FOODS INC MILAN, MO 1629 102801030601 Total Residual Chlorine 689
COG603078 NEW CARDINAL MILL NEDERLAND, CO 1629 Mercury 593
MO0021440 CITY OF MONETT WASTEWATER TREATMENT FACILITY MONETT , MO 1629 110702070704 Cadmium 586
MO0131008 MID-MISSOURI ENERGY LLC MALTA BEND, MO 1629 Total Residual Chlorine 489
COG603078 NEW CARDINAL MILL NEDERLAND, CO 1629 Zinc 441
CA0055824 LA DEPARTMENT WATER & POWER CASTAIC, CA 1629 180701020305 Copper 341
MO0108774 ST FRANCOIS CO ENVIR CORP PARK HILLS, MO 1629 071401040111 Lead 225
COG603009 CITY OF MONTROSE WASTEWATER TREATMENT PLANT MONTROSE, CO 1629 140200060606 Selenium 204

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