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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 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 - 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
Ammonia as N 926  Original DMR load is 835 83.2 83.2
Total Residual Chlorine 92.4 8.31 91.5
Mercury 42.4 3.81 95.3
Zinc 20.2 1.82 97.1
Molybdenum 17.8 1.605 98.7
Copper 7.11 0.63 99.4
Formaldehyde 5.81 0.52 99.9
Nitrite nitrogen, dissolved (as N) 0.64 0.058 99.9
Nitrogen, nitrate dissolved 0.15 0.013 100

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Top Receiving Watersheds (2011)
HUC-12 Code HUC Name Total DMR TWPE (lb-eq/yr)
031602050206 Bon Secour River 582
031700090201 Mississippi Sound-Grand Bay 51.6
080302060104 Roebuck Lake-Yazoo River 8.27
080302060300 7.24
080302060900 5.55
080302070800 4.81
080302071000 2.063
020402060507 Muskee Creek-Maurice River 1.604
080302071600 1.13
010900040702 Barrington River-Warren River 0.79

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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)
AL0048194 CARSON AND CO INC BON SECOUR, AL 2092 031602050206 Ammonia as N 582
AS0000019 STAR-KIST SAMOA TUNA CANNERY PAGO PAGO, AS 2091 Ammonia as N 175
AS0000019 STAR-KIST SAMOA TUNA CANNERY PAGO PAGO, AS 2091 Mercury 42.4
AK0037303 TRIDENT AKUTAN SEAFOOD PROCESSING 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 STAR-KIST SAMOA TUNA CANNERY PAGO PAGO, AS 2091 Zinc 20.2
MS0057550 SUPERIOR FISH PRODUCTS INC. MACON, MS 2092 031601080702 Total Residual Chlorine 19.8
GA0039268 KING & PRINCE SEAFOOD BRUNSWICK, GA 2092 030702030203 Molybdenum 17.8
AL0055379 BAYOU LA BATRE INDUSTRIAL FAC BAYOU LA BATRE, AL 2092 031700090201 Total Residual Chlorine 17.7
AK0028657 UNISEA DUTCH HARBOR FACILITY DUTCH HARBOR, AK 2092 190301020804 Total Residual Chlorine 14.8

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