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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 - 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
Manganese, dissolved (as Mn) 15.1 50.3 50.3
Manganese, total recoverable 5.67 18.8 69.1
Chlorine, total residual 4.59 15.2 84.3
Iron, total recoverable 2.13 7.076 91.4
Fluoride, total (as F) 1.78 5.92 97.3
Zinc, total recoverable 0.63 2.12 99.5
Nitrogen, ammonia total (as N) 0.14 0.49 99.9
1,2-Dichloroethene, effluent 0.00054 0.0018 99.9
Methylene chloride 0.000083 0.00027 99.9
Selenium, dissolved (as Se) 0.0000013 4.57E-006 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
101900030402 City of Thornton-South Platte River 17.04
101900060607 Outlet Big Thompson River 5.92
050301010501 Cold Run 4.74
050902030103 Sharon Creek-Mill Creek 2.43
101900050701 Indian Mountain-Saint Vrain Creek 0.0000013

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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)
COG315219 DAHLIA PONDS COMMERCE CITY, CO 1629 101900030402 Manganese 15.1
COG603035 CENTRAL WELD SANITARY LANDFILL GREELEY, CO 1629 101900060607 Manganese 5.67
OH0131318 LOUIS TOBIN CENTER LISBON, OH 1629 050301010501 Total Residual Chlorine 4.59
COG315219 DAHLIA PONDS COMMERCE CITY, CO 1629 101900030402 Iron 1.87
OHD000002 PRISTINE INC SITE READING, OH 1629 050902030103 Fluoride 1.78
OHD000002 PRISTINE INC SITE READING, OH 1629 050902030103 Zinc 0.63
COG603035 CENTRAL WELD SANITARY LANDFILL GREELEY, CO 1629 101900060607 Iron 0.24
OH0131318 LOUIS TOBIN CENTER LISBON, OH 1629 050301010501 Ammonia as N 0.14
OHD000002 PRISTINE INC SITE READING, OH 1629 050902030103 Iron 0.0104
COG603035 CENTRAL WELD SANITARY LANDFILL GREELEY, CO 1629 101900060607 1,2-Dichloroethylene 0.00054

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