Darling Ingredients Inc.

NPDES permit MI0054771 · Minor NON-POTW · administratively continued, expires 2025-10-01 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-10-01 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 22 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 21 days after each monitoring period ends (the most common figure among MI permits in EPA's filings — check your permit).

Limits in force (37)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Thermal DischargeDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MN >= 3 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 110 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 220 lb/d all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG <= 130 lb/d all year
001Solids, total suspendedDAILY MX <= 260 lb/d all year
001Oil & GreaseMO AVG report only all year
001Oil & GreaseDAILY MX report only all year
001Oil & GreaseMO AVG <= 60 lb/d all year
001Oil & GreaseDAILY MX <= 120 lb/d all year
001Nitrogen, total [as N]MO AVG <= 134 mg/L all year
001Nitrogen, total [as N]DAILY MX <= 194 mg/L all year
001Nitrogen, total [as N]MO AVG <= 335 lb/d all year
001Nitrogen, total [as N]DAILY MX <= 485 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 80 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 170 lb/d all year
001Phosphorus, total [as P]MO AVG = 1 mg/L all year
001Phosphorus, total [as P]DAILY MX report only all year
001Chloride [as Cl]DAILY MX report only all year
001Sulfate, total [as SO4]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= 38 ug/L all year
001Coliform, fecal generalDAILY MX <= 400 #/100mL all year
001Outfall observation,visual, y/n responseVALUE report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states