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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 - Grain mills (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
PCB, total, scan effluent 504,173 99.8 99.8
Chlorine, total residual 361 0.071 99.9
Sulfate, total (as SO4) 71.6 0.014 99.9
Zinc, dissolved (as Zn) 20.9 0.0041 99.9
Copper, total (as Cu) 17.5 0.0034 99.9
Nickel, total (as Ni) 15.7 0.0031 99.9
Manganese, dissolved (as Mn) 15.3 0.00303 99.9
Chloride, dissolved (as Cl) 11.6 0.0023 99.9
Iron, dissolved (as Fe) 1.22 0.00024 99.9
Nitrogen, ammonia total (as N) 0.49 9.81E-005 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
070200060301 City of Marshall-Redwood River 105
102702020202 Walnut Creek-Big Blue River 49.1

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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)
NE0130141 ADM CORN PROCESSING COLUMBUS, NE 2046 102002010302 Polychlorinated biphenyls 504,173
IA0081531 KEOKUK, IA 2046 070801041806 Total Residual Chlorine 190
TN0029068 CARGILL INC MEMPHIS, TN 2046 080101000703 Total Residual Chlorine 146
MN0057037 ADM MARSHALL, MN 5159 070200060301 Sulfate 71.6
IA0000761 QUAKER OATS CO CEDAR RAPIDS, IA 2043 070802051507 Total Residual Chlorine 25.5
NE0000116 NESTLE PURINA PETCARE CO CRETE, NE 2047 102702020202 Zinc 20.9
MN0057037 ADM MARSHALL, MN 5159 070200060301 Copper 17.5
MN0057037 ADM MARSHALL, MN 5159 070200060301 Nickel 15.7
NE0000116 NESTLE PURINA PETCARE CO CRETE, NE 2047 102702020202 Manganese 15.3
NE0000116 NESTLE PURINA PETCARE CO CRETE, NE 2047 102702020202 Chloride 11.6

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