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Darling Ingredients Inc

Animal And Marine Fats And Oils, Butler, Kentucky. NPDES permit KY0111023, in force until Mar 31, 2030. Last 12 months: no values over a limit, 10 required values missing, 1 of 35 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A1 monthly (18 values), outfall 001 form A2 quarterly (5 values), outfall 001 form B1 monthly (22 values), outfall 001 form B2 quarterly (5 values), outfall RN1 form 2 quarterly (10 values), outfall BF1 form 3 twice a year, and 1 more form
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 20 required values missing, 2 of 39 reports late

Limits in force (80)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximum≤ 31.7 deg Call year001
Temperature, water deg. centigradedaily maximum≤ 31.7 deg Call year001
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/Lall year001
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/Lall year001
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 137 lb/dall year001
Solids, total suspendedmonthly average≤ 137 lb/dall year001
Solids, total suspendeddaily maximum≤ 275 lb/dall year001
Solids, total suspendeddaily maximum≤ 275 lb/dall year001
Oil & Greasemonthly average≤ 61.8 lb/dall year001
Oil & Greasemonthly average≤ 61.8 lb/dall year001
Oil & Greasedaily maximum≤ 123 lb/dall year001
Oil & Greasedaily maximum≤ 123 lb/dall year001
Nitrogen, total [as N]monthly average≤ 134 mg/Lall year001
Nitrogen, total [as N]monthly average≤ 134 mg/Lall year001
Nitrogen, total [as N]daily maximum≤ 194 mg/Lall year001
Nitrogen, total [as N]daily maximum≤ 194 mg/Lall year001
Ammonia nitrogen, total, [as N] 30 daymonthly average≤ 2 mg/LMay–Oct001
Ammonia nitrogen, total, [as N] 30 daymonthly average≤ 4 mg/Lall year001
Ammonia nitrogen, total, [as N] 30 daymonthly average≤ 4 mg/LMay–Oct001
Ammonia nitrogen, total, [as N] 30 daymonthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Ammonia nitrogen, total, [as N] 30 daydaily maximum≤ 3 mg/LMay–Oct001
Ammonia nitrogen, total, [as N] 30 daydaily maximum≤ 6 mg/Lall year001
Ammonia nitrogen, total, [as N] 30 daydaily maximum≤ 6 mg/LMay–Oct001
Ammonia nitrogen, total, [as N] 30 daydaily maximum≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Ammonia nitrogen, total, [as N] 30 daymonthly average≤ 84 lb/dMay–Oct001
Ammonia nitrogen, total, [as N] 30 daymonthly average≤ 84 lb/dall year001
Ammonia nitrogen, total, [as N] 30 daymonthly average≤ 84 lb/dMay–Oct001
Ammonia nitrogen, total, [as N] 30 daymonthly average≤ 84 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Ammonia nitrogen, total, [as N] 30 daydaily maximum≤ 168 lb/dMay–Oct001
Ammonia nitrogen, total, [as N] 30 daydaily maximum≤ 168 lb/dall year001
Ammonia nitrogen, total, [as N] 30 daydaily maximum≤ 168 lb/dMay–Oct001
Ammonia nitrogen, total, [as N] 30 daydaily maximum≤ 168 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Fecal coliform, MPN, EC med, 44.5 Cmonthly averagereport only (#/100mL)all year001
Fecal coliform, MPN, EC med, 44.5 Cmonthly averagereport only (#/100mL)all year001
Fecal coliform, MPN, EC med, 44.5 Cdaily maximum≤ 400 #/100mLall year001
Fecal coliform, MPN, EC med, 44.5 Cdaily maximum≤ 400 #/100mLall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year001
Biochemical oxygen demand-5monthly average≤ 108 lb/dall year001
Biochemical oxygen demand-5monthly average≤ 108 lb/dall year001
Biochemical oxygen demand-5daily maximum≤ 216 lb/dall year001
Biochemical oxygen demand-5daily maximum≤ 216 lb/dall year001
pHminimum≥ 6 SUall yearBF1
pHdaily maximum≤ 9 SUall yearBF1
Solids, total suspendedmonthly averagereport only (mg/L)all yearBF1
Solids, total suspendeddaily maximumreport only (mg/L)all yearBF1
Oil & Greasemonthly averagereport only (mg/L)all yearBF1
Oil & Greasedaily maximumreport only (mg/L)all yearBF1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearBF1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearBF1
pHminimum≥ 6 SUall yearBF2
pHdaily maximum≤ 9 SUall yearBF2
Solids, total suspendedmonthly averagereport only (mg/L)all yearBF2
Solids, total suspendeddaily maximumreport only (mg/L)all yearBF2
Oil & Greasemonthly averagereport only (mg/L)all yearBF2
Oil & Greasedaily maximumreport only (mg/L)all yearBF2
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearBF2
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearBF2
pHminimum≥ 6 SUall yearRN1
pHdaily maximum≤ 9 SUall yearRN1
Solids, total suspendedmonthly averagereport only (mg/L)all yearRN1
Solids, total suspendeddaily maximumreport only (mg/L)all yearRN1
Oil & Greasemonthly averagereport only (mg/L)all yearRN1
Oil & Greasedaily maximumreport only (mg/L)all yearRN1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearRN1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearRN1
E. coli30-day geometric meanreport only (#/100mL)all yearRN1
E. coli7-day geometric meanreport only (#/100mL)all yearRN1

How strict are these limits?

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

Same industry: the 29 Food and Kindred Products permits in Kentucky.

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