Jump to main content or area navigation.

Contact Us

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 information on the methodology and types of changes identified, see EPA's most recent odd-numbered year Annual Effluent Guidelines Review Report (PDF) (169 pp, 2MB) on the Effluent Guidelines Plan webpage. Because of this review and EPA's methodology for interpreting data and calculating loads, the calculated loads and category rankings may differ from original calculations using DMR and TRI data that have not been updated. Data that have been updated by EPA's annual reviews are indicated by green flags designating that a change has been made to a concentration, quantity, or flow value. A listing of the DMR and TRI data changes from the most recent annual review is available in the Annual Effluent Guidelines Review Report Appendices (PDF) (241 pp, 3.3MB).

Point Source Category Information - Independent and Stand Alone Labs (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
Total Residual Chlorine 251 31.5 31.5
Lead 204 25.5 57.1
Copper 138 17.3 74.5
Chloride 83.1 10.4 84.9
Silver 39.4 4.95 89.9
Cadmium 22.4 2.82 92.7
Mercury 13.7 1.72 94.4
Aluminum 9.79 1.23 95.7
Zinc 7.85 0.98 96.6
Iron 6.58 0.82 97.5

Download All Data

Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
020302020501 Upper Peconic River 102
031001010301 North Bear Branch 67.3
110902020302 Coal Creek-Canadian River 59.02
041201040604 City of North Tonawanda-Niagara River 58.3
020301050504 Green Brook 50.04
011000040303 Milford Harbor-Frontal Long Island Sound 47.06
120401040302 Cole Creek-Whiteoak Bayou 17.6
050600011103 Mouth Olentangy River 16.6
040900050204 Mill Creek 12.4
020501050308 Hodgmans Creek-Cohocton River 11.6

Download All Data

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)
NY0007030 GE GLOBAL RESEARCH CENTER SCHENECTADY, NY 8731 020200041109 Lead 193
FL0715093 UNKNOWN TAMPA, FL 8731 031001010301 Chloride 61.7
NY0001201 ISLECHEM LLC GRAND ISLAND, NY 8731 041201040604 Total Residual Chlorine 58.3
OK0043931 US FAA MIKE MONRONEY AERONAUTICAL CENTER OKLAHOMA CITY, OK 8731 110902020302 Total Residual Chlorine 55.08
CT0090182 NATIONAL MARINE FISHERIES MILFORD, CT 8731 011000040303 Total Residual Chlorine 47.06
NJ0140155 ALCATEL-LUCENT. MURRAY HILL, NJ 8731 020301050504 Copper 44.5
NY0007030 GE GLOBAL RESEARCH CENTER SCHENECTADY, NY 8731 020200041109 Total Residual Chlorine 42.9
NY0005835 U.S. DOE BROOKHAVEN NATL. LAB. - BROOKHAVEN SCIENCE ASSOCIATES UPTON, NY 8731 020302020501 Silver 39.2
NY0007030 GE GLOBAL RESEARCH CENTER SCHENECTADY, NY 8731 020200041109 Copper 35.7
NY0005835 U.S. DOE BROOKHAVEN NATL. LAB. - BROOKHAVEN SCIENCE ASSOCIATES UPTON, NY 8731 020302020501 Copper 33.7

Download All Data

Top of Page

About the Data Glossary Error Correction Contact Us

Jump to main content.