Darling Ingredients Inc.

NPDES permit TN0005371 · Minor NON-POTW · effective, expires 2029-11-30 · EPA's file as of 2026-09-19

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Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

9values over a limit
0required values missing, on 0 form(s)
1of 12 forms filed late

Last period with anything received: 2026-08-31. Most often over: E. coli (4), BOD, 5-day, 20 deg. C (3), Coliform, fecal MF, MFC broth, 44.5 C (1).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (34)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CMO AVG <= 52 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 104 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG <= 59 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 119 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG <= 68 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 136 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 64 lb/d all year
001Solids, total suspendedDAILY MX <= 128 lb/d all year
001Solids, total suspendedMO AVG <= 73 lb/d all year
001Solids, total suspendedDAILY MX <= 145 lb/d all year
001Solids, total suspendedMO AVG <= 83 lb/d all year
001Solids, total suspendedDAILY MX <= 166 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, ammonia total [as N]MO AVG <= 41 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 81 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 46 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 92 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 53 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 106 lb/d all year
001Oil and greaseMO AVG <= 29 lb/d all year
001Oil and greaseDAILY MX <= 58 lb/d all year
001Oil and greaseMO AVG <= 33 lb/d all year
001Oil and greaseDAILY MX <= 66 lb/d all year
001Oil and greaseMO AVG <= 38 lb/d all year
001Oil and greaseDAILY MX <= 76 lb/d all year
001Coliform, fecal MF, MFC broth, 44.5 CDAILY MX <= 400 MPN/100mL 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
001Chlorine, total residualDAILY MX <= 2 mg/L all year
001E. coliMO AVG <= 126 #/100mL all year
001E. coliDAILY MX <= 410 #/100mL 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