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 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 - Canned and preserved seafood processing (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
Nitrogen, ammonia total (as N) 447  Original DMR load is 226 72.07 72.07
Chlorine, total residual 139 22.3 94.4
Zinc, total recoverable 22.03 3.55 97.9
Formalin 5.81 0.93 98.9
Copper, total recoverable 5.79 0.93 99.8
Nitrogen, nitrite total (as N) 0.64 0.104 99.9
Nitrogen, nitrate total (as N) 0.15 0.024 99.9
Mercury, total recoverable 0.043 0.0069 100

Download All Data

Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
010600010602 Casco Bay Frontal Drainages 68.5
031700090201 Mississippi Sound-Grand Bay 49.2
170402121005 Mud Creek 16.7
020402060507 Muskee Creek-Maurice River 1.604
010900040702 Barrington River-Warren River 0.79
031700090103 West Fowl River 0.308
120402050300 Austin Bayou 0.22
031602050206 Bon Secour River 0.22
010600031001 Portsmouth Harbor 222  Original DMR load is 0.0065

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)
AS0000019 STARKIST SAMOA INC PAGO PAGO, AS 2091 Ammonia as N 175
ME0001741 B & M BAKED BEAN PLANT PORTLAND, ME 2091 010600010602 Total Residual Chlorine 68.5
AK0037303 TRIDENT SEAFOODS - AKUTAN FACILITY AKUTAN, AK 2092 190301020704 Total Residual Chlorine 36.1
AL0055379 BAYOU LA BATRE INDUSTRIAL FAC BAYOU LA BATRE, AL 2092 031700090201 Ammonia as N 31.5
AS0000019 STARKIST SAMOA INC PAGO PAGO, AS 2091 Zinc 22.03
AL0055379 BAYOU LA BATRE INDUSTRIAL FAC BAYOU LA BATRE, AL 2092 031700090201 Total Residual Chlorine 17.7
IDG132002 CLEAR SPRINGS FOODS INC - FISH PROCESSING PLANT 1 BUHL, ID 2092 170402121005 Ammonia as N 16.7
AK0028657 UNISEA INC DUTCH HARBOR, AK 2091 190301020804 Total Residual Chlorine 14.8
ME0002437 CRAIG BROOK NAT FISH HATCHERY EAST ORLAND, ME 2091 010200051006 Formaldehyde 5.81
AS0000019 STARKIST SAMOA INC PAGO PAGO, AS 2091 Copper 5.79

Download All Data

Top of Page

About the Data Glossary Error Correction Contact Us

Jump to main content.