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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 - Drinking Water Treatment (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
Iron, total recoverable 24,019  Original DMR load is 23,174,682 1.72 1.72
Chlorine, total residual 416,239  Original DMR load is 20,215,351 29.9 31.6
Sulfide, total (as S) 380  Original DMR load is 693,245 0.027 31.7
Hydrogen sulfide, unionized 1,422  Original DMR load is 258,024 0.102 31.8
Aluminum, total recoverable 177,689 12.7 44.6
Copper, total (as Cu) 117,494 8.45 53.06
Mercury, total recoverable 113,299 8.15 61.2
Lead, total (as Pb) 108,995 7.84 69.06
Aluminum, total (as Al) 93,325 6.71 75.7
Aluminum, acid soluble 74,427 5.35 81.1

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
040400010502 Main Beaver Dam Ditch-Deep River 113,154
020700100103 Pimmit Run-Potomac River 54,855
210100050501 Laguna San Jose, Laguna Torrecilla, Laguna de Pinones D Watersheds 17,526
051002050505 Clarks Run 3,582
031002010205 Alligator Creek 769
020402020602 Ridley Creek 193
080202050503 65.5
050100060501 Upper Redbank Creek 43.4
051402011202 Jackson Creek-Ohio River 12.6

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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)
MO0003727 ST LOUIS CO WATER CO ST. LOUIS, MO 4941 103002000704 Iron 23,174  Original DMR load is 23,173,837
MO0003727 ST LOUIS CO WATER CO ST. LOUIS, MO 4941 103002000704 Total Residual Chlorine 33,375  Original DMR load is 19,832,487
CO0046728 BRIGHTON RO BRIGHTON, CO 4941 101900030409 Sulfide 47.1  Original DMR load is 692,912
FL0454451 PALM COAST WTP #3 - MEMBRANE CONCENTRATE DISPOSAL PALM COAST, FL 4941 Hydrogen sulfide 150  Original DMR load is 256,751
PR0022781 PRASA WTP PTA VIEJA PONCE PONCE, PR 4941 210100040307 Total Residual Chlorine 198,664
ALG640009 SANFORD SPRINGS WTP PIEDMONT, AL 4941 Aluminum 116,096
PR0022853 PRASA NAGUABO WTP NAGUABO, PR 4941 210100050203 Copper 114,460
IN0025763 CROWN POINT MUNICIPAL WWTP CROWN POINT, IN 4941 040400010502 Mercury 113,074
FL0035378 CHARLOTTE HARBOR WATER ASSOCIATION INC PUNTA GORDA, FL 4941 031001011106 Magnesium 63,111
PR0022853 PRASA NAGUABO WTP NAGUABO, PR 4941 210100050203 Lead 60,466

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