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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 - Drinking Water Treatment (TRI)

EPA 304M Annual Review icon — Indicates load was altered by EPA’s 304M Annual Review. You can hover over the green flag to see the original load from the TRI data.

Top Chemicals - Toxic-Weighted Pounds (TWPE) (2011)
Chemical Name Direct TRI TWPE (lb-eq/yr) Indirect TRI TWPE (lb-eq/yr) Total TRI TWPE (lb-eq/yr) % of Category TWPE Cumulative % of
Category TWPE
COPPER AND COPPER COMPOUNDS 860 0 860 52.3 52.3
MANGANESE AND MANGANESE COMPOUNDS 783 0 783 47.6 99.9
AMMONIA 0.035 0.12 0.16 0.0098 99.9

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Direct TRI TWPE (lb-eq/yr) Indirect TRI TWPE (lb-eq/yr) Total TRI TWPE (lb-eq/yr)
020700100103 Pimmit Run-Potomac River 0.0025 0 0.0025

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Top Facility Discharges in Toxic-Weighted Pounds (TWPE) (2011)
TRI Facility ID Facility Name City, State NAICS Code HUC-12 Code Top Chemical Top Chemcical Direct TRI TWPE (lb-eq/yr) Top Chemcical Indirect TRI TWPE (lb-eq/yr) Top Chemcical Total TRI TWPE (lb-eq/yr)
20001SCMCM2500F US ARMY CORPS OF ENGINEERS MCMILLAN WTP WASHINGTON AQUEDUC WASHINGTON, DC 221310 COPPER AND COPPER COMPOUNDS 860 0 860
20001SCMCM2500F US ARMY CORPS OF ENGINEERS MCMILLAN WTP WASHINGTON AQUEDUC WASHINGTON, DC 221310 MANGANESE AND MANGANESE COMPOUNDS 783 0 783
53221HWRDP725WH HOWARD PURIFICATION PLANT MILWAUKEE, WI 221310 AMMONIA 0.033 0.12 0.15
20315SCDLC5900M US ARMY CORPS OF ENGINEERS DALECARLIA WTP WASHINGTON, DC 221310 020700100103 AMMONIA 0.0025 0 0.0025
54956NNHWT234SP NEENAH WATER FILTRATION PLANT NEENAH, WI 221310 AMMONIA 0 0 0
53221HWRDP725WH HOWARD PURIFICATION PLANT MILWAUKEE, WI 221310 OZONE 0 0 0
53211LNNWD3000N LINNWOOD PURIFICATION PLANT MILWAUKEE, WI 221310 OZONE 0 0 0
20001SCMCM2500F US ARMY CORPS OF ENGINEERS MCMILLAN WTP WASHINGTON AQUEDUC WASHINGTON, DC 221310 AMMONIA 0 0.00067 0
53211LNNWD3000N LINNWOOD PURIFICATION PLANT MILWAUKEE, WI 221310 AMMONIA 0 0 0

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