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Darling Ingredients Inc.

Animal And Marine Fats And Oils, Union City, Tennessee. NPDES permit TN0000931, in force until Aug 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (32 values), outfall 01A form G monthly (10 values), outfall SW3 form Q quarterly (10 values), outfall SW4A form Q quarterly (10 values), outfall SW4B form Q yearly, outfall SW4D form Q yearly, and 1 more form
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 35 reports late

Limits in force (74)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 10.5 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 15.8 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 220 lb/dall year001
Solids, total suspendeddaily maximum≤ 440 lb/dall year001
Solids, total suspendedmonthly average≤ 132 lb/dall year001
Solids, total suspendeddaily maximum≤ 264 lb/dall year001
Solids, total suspendedmonthly average≤ 44 lb/dall year001
Solids, total suspendeddaily maximum≤ 88 lb/dall year001
Nitrogen, total [as N]monthly average≤ 134 mg/Lall year001
Nitrogen, total [as N]daily maximum≤ 194 mg/Lall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 5.3 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 8.8 lb/dall year001
Oil and greasemonthly average≤ 100 lb/dall year001
Oil and greasedaily maximum≤ 200 lb/dall year001
Oil and greasemonthly average≤ 60 lb/dall year001
Oil and greasedaily maximum≤ 120 lb/dall year001
Oil and greasemonthly average≤ 20 lb/dall year001
Oil and greasedaily maximum≤ 40 lb/dall year001
Floating solids, waste or visible foam-visualmonthly averagereport only (N=0;Y=1)all year001
Floating solids, waste or visible foam-visualdaily maximumreport only (N=0;Y=1)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
E. colimonthly average≤ 126 #/100mLall year001
E. colidaily maximum≤ 410 #/100mLall year001
UV Light Workingmonthly averagereport only (pass=0;fail=1)all year001
Coliform, fecal generaldaily maximum≤ 400 MPN/100mLall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year01A
pHvaluereport only (SU)all year01A
Solids, total suspendeddaily maximumreport only (mg/L)all year01A
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year01A
Nitrogen, total [as N]daily maximumreport only (mg/L)all year01A
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year01A
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year01A
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year01A
Flow, in conduit or thru treatment plantmonthly totalreport only (gal/mo)all year01A
E. colidaily maximumreport only (#/100mL)all year01A
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearSW3
pHvaluereport only (SU)all yearSW3
Solids, total suspendeddaily maximumreport only (mg/L)all yearSW3
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearSW3
Oil and greasedaily maximumreport only (mg/L)all yearSW3
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW3
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW3
E. colidaily maximumreport only (#/100mL)all yearSW3
Coliform, fecal generaldaily maximumreport only (MPN/100mL)all yearSW3
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all yearSW3
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearSW4A
pHvaluereport only (SU)all yearSW4A
Solids, total suspendeddaily maximumreport only (mg/L)all yearSW4A
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearSW4A
Oil and greasedaily maximumreport only (mg/L)all yearSW4A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW4A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW4A
E. colidaily maximumreport only (#/100mL)all yearSW4A
Coliform, fecal generaldaily maximumreport only (MPN/100mL)all yearSW4A
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all yearSW4A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW4B
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW4B
E. colidaily maximumreport only (#/100mL)all yearSW4B
Coliform, fecal generaldaily maximumreport only (MPN/100mL)all yearSW4B
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW4D
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW4D
E. colidaily maximumreport only (#/100mL)all yearSW4D
Coliform, fecal generaldaily maximumreport only (MPN/100mL)all yearSW4D
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW4E
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW4E
E. colidaily maximumreport only (#/100mL)all yearSW4E
Coliform, fecal generaldaily maximumreport only (MPN/100mL)all yearSW4E

How strict are these limits?

Cited limits by parameter: Tennessee's rules and the federal ones.

Same industry: the 13 Food and Kindred Products permits in Tennessee.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0000931 · MCP: https://passage-data.com/mcp