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Darling Ingredients Inc.

Animal And Marine Fats And Oils, Hamilton, Michigan. NPDES permit MI0054771 expired Oct 1, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: form A monthly (14 values), form B monthly (23 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (37)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Thermal Dischargedaily maximumreport only (MBTU/hr)all year
Oxygen, dissolved [DO]daily minimum≥ 3 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 110 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 220 lb/dall year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 130 lb/dall year
Solids, total suspendeddaily maximum≤ 260 lb/dall year
Oil & Greasemonthly averagereport only (mg/L)all year
Oil & Greasedaily maximumreport only (mg/L)all year
Oil & Greasemonthly average≤ 60 lb/dall year
Oil & Greasedaily maximum≤ 120 lb/dall year
Nitrogen, total [as N]monthly average≤ 134 mg/Lall year
Nitrogen, total [as N]daily maximum≤ 194 mg/Lall year
Nitrogen, total [as N]monthly average≤ 335 lb/dall year
Nitrogen, total [as N]daily maximum≤ 485 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 80 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 170 lb/dall year
Phosphorus, total [as P]monthly average= 1 mg/Lall year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Chloride [as Cl]daily maximumreport only (mg/L)all year
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 38 ug/Lall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year

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

Same industry: the 26 Food and Kindred Products permits in Michigan.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MI0054771 · MCP: https://passage-data.com/mcp