Darling Ingredients - Linkwood

NPDES permit MD0003247 · Minor NON-POTW · effective, expires 2027-01-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
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

33values over a limit
37required values missing, on 9 form(s)
3of 59 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (20), Nitrogen, total [as N] (5), E. coli (4).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (181)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMAXIMUM <= 90 deg F (alert) all year
001Oxygen, dissolved [DO]MINIMUM >= 6.5 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 4 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, 5-day, 20 deg. CMO AVG <= 4 mg/L Jan, Feb, Mar, Dec
001BOD, 5-day, 20 deg. CDAILY MX report only Jan, Feb, Mar, Dec
001BOD, 5-day, 20 deg. CDAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, 5-day, 20 deg. CMO AVG <= 90 lb/mo Jan, Feb, Mar, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 31 lb/mo Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, 5-day, 20 deg. CDAILY MX <= 180 lb/mo Jan, Feb, Mar, Dec
001BOD, 5-day, 20 deg. CDAILY MX <= 39 lb/mo Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001pHMINIMUM >= 6 SU all year
001pHDAILY MX <= 7.8 SU all year
001Solids, total suspendedMO AVG report only Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMO AVG report only Jan, Feb, Mar, Dec
001Solids, total suspendedDAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedDAILY MX report only Jan, Feb, Mar, Dec
001Solids, total suspendedMO AVG <= 39 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMO AVG <= 110 lb/d Jan, Feb, Mar, Dec
001Solids, total suspendedDAILY MX <= 53 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedDAILY MX <= 220 lb/d Jan, Feb, Mar, Dec
001Oil & GreaseMO AVG report only Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Oil & GreaseMO AVG report only Jan, Feb, Mar, Dec
001Oil & GreaseDAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Oil & GreaseDAILY MX report only Jan, Feb, Mar, Dec
001Oil & GreaseMO AVG <= 13 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Oil & GreaseMO AVG <= 50 lb/d Jan, Feb, Mar, Dec
001Oil & GreaseDAILY MX <= 20 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Oil & GreaseDAILY MX <= 100 lb/d Jan, Feb, Mar, Dec
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]MX MO AV <= 1231 lb/mo all year
001Nitrogen, total [as N]ANNL MAX <= 8477 lb/yr all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= 1.4 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX MO AV <= 3.2 mg/L Jan, Feb, Mar, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 12.2 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 12.2 mg/L Jan, Feb, Mar, Dec
001Nitrogen, ammonia total [as N]MO AVG report only Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Dec
001Nitrogen, Kjeldahl, total [as N]ANNL AVG <= 3.6 mg/L all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG <= 123 lb/mo all year
001Phosphorus, total [as P]ANNL MAX <= 315 lb/yr all year
001Phosphorus, total [as P]DAILY MX 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
001Chlorine, total residualMX MO AV <= .1 mg/L all year
001Chlorine, total residualDAILY MX <= .1 mg/L all year
001E. coliMX MO AV <= 126 MPN/100mL all year
001E. coliDAILY MX report only all year
BGWNitrogen, nitrate total [as N]VALUE report only all year
BGWNitrogen, nitrate total [as N]VALUE report only all year
BGWNitrogen, nitrate total [as N]VALUE report only all year
BGWNitrogen, nitrate total [as N]VALUE report only all year
BGWNitrogen, Kjeldahl, total [as N]VALUE report only all year
BGWNitrogen, Kjeldahl, total [as N]VALUE report only all year
BGWNitrogen, Kjeldahl, total [as N]VALUE report only all year
BGWNitrogen, Kjeldahl, total [as N]VALUE report only all year
BGWNitrogen, Ammonia TotalVALUE report only all year
BGWNitrogen, Ammonia TotalVALUE report only all year
BGWNitrogen, Ammonia TotalVALUE report only all year
BGWNitrogen, Ammonia TotalVALUE report only all year
BGWSolids, total dissolvedVALUE report only all year
BGWSolids, total dissolvedVALUE report only all year
BGWSolids, total dissolvedVALUE report only all year
BGWSolids, total dissolvedVALUE report only all year
BGWColiform, fecal generalVALUE report only all year
BGWColiform, fecal generalVALUE report only all year
BGWColiform, fecal generalVALUE report only all year
BGWColiform, fecal generalVALUE report only all year
MW1Nitrogen, nitrate total [as N]VALUE report only all year
MW1Nitrogen, nitrate total [as N]VALUE report only all year
MW1Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW1Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW1Nitrogen, Ammonia TotalVALUE report only all year
MW1Nitrogen, Ammonia TotalVALUE report only all year
MW1Solids, total dissolvedVALUE report only all year
MW1Solids, total dissolvedVALUE report only all year
MW1Coliform, fecal generalVALUE report only all year
MW1Coliform, fecal generalVALUE report only all year
MW2Nitrogen, nitrate total [as N]VALUE report only all year
MW2Nitrogen, nitrate total [as N]VALUE report only all year
MW2Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW2Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW2Nitrogen, Ammonia TotalVALUE report only all year
MW2Nitrogen, Ammonia TotalVALUE report only all year
MW2Solids, total dissolvedVALUE report only all year
MW2Solids, total dissolvedVALUE report only all year
MW2Coliform, fecal generalVALUE report only all year
MW2Coliform, fecal generalVALUE report only all year
MW3Nitrogen, nitrate total [as N]VALUE report only all year
MW3Nitrogen, nitrate total [as N]VALUE report only all year
MW3Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW3Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW3Nitrogen, Ammonia TotalVALUE report only all year
MW3Nitrogen, Ammonia TotalVALUE report only all year
MW3Solids, total dissolvedVALUE report only all year
MW3Solids, total dissolvedVALUE report only all year
MW3Coliform, fecal generalVALUE report only all year
MW3Coliform, fecal generalVALUE report only all year
MW4Nitrogen, nitrate total [as N]VALUE report only all year
MW4Nitrogen, nitrate total [as N]VALUE report only all year
MW4Nitrogen, nitrate total [as N]VALUE report only all year
MW4Nitrogen, nitrate total [as N]VALUE report only all year
MW4Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW4Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW4Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW4Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW4Nitrogen, Ammonia TotalVALUE report only all year
MW4Nitrogen, Ammonia TotalVALUE report only all year
MW4Nitrogen, Ammonia TotalVALUE report only all year
MW4Nitrogen, Ammonia TotalVALUE report only all year
MW4Solids, total dissolvedVALUE report only all year
MW4Solids, total dissolvedVALUE report only all year
MW4Solids, total dissolvedVALUE report only all year
MW4Solids, total dissolvedVALUE report only all year
MW4Coliform, fecal generalVALUE report only all year
MW4Coliform, fecal generalVALUE report only all year
MW4Coliform, fecal generalVALUE report only all year
MW4Coliform, fecal generalVALUE report only all year
MW5Nitrogen, nitrate total [as N]VALUE report only all year
MW5Nitrogen, nitrate total [as N]VALUE report only all year
MW5Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW5Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW5Nitrogen, Ammonia TotalVALUE report only all year
MW5Nitrogen, Ammonia TotalVALUE report only all year
MW5Solids, total dissolvedVALUE report only all year
MW5Solids, total dissolvedVALUE report only all year
MW5Coliform, fecal generalVALUE report only all year
MW5Coliform, fecal generalVALUE report only all year
MW6Nitrogen, nitrate total [as N]VALUE report only all year
MW6Nitrogen, nitrate total [as N]VALUE report only all year
MW6Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW6Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW6Nitrogen, Ammonia TotalVALUE report only all year
MW6Nitrogen, Ammonia TotalVALUE report only all year
MW6Solids, total dissolvedVALUE report only all year
MW6Solids, total dissolvedVALUE report only all year
MW6Coliform, fecal generalVALUE report only all year
MW6Coliform, fecal generalVALUE report only all year
MW7Nitrogen, nitrate total [as N]VALUE report only all year
MW7Nitrogen, nitrate total [as N]VALUE report only all year
MW7Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW7Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW7Nitrogen, Ammonia TotalVALUE report only all year
MW7Nitrogen, Ammonia TotalVALUE report only all year
MW7Solids, total dissolvedVALUE report only all year
MW7Solids, total dissolvedVALUE report only all year
MW7Coliform, fecal generalVALUE report only all year
MW7Coliform, fecal generalVALUE report only all year
MW8Nitrogen, nitrate total [as N]VALUE report only all year
MW8Nitrogen, nitrate total [as N]VALUE report only all year
MW8Nitrogen, nitrate total [as N]QRTR AVG report only all year
MW8Nitrogen, nitrate total [as N]QRTR AVG report only all year
MW8Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW8Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW8Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW8Nitrogen, Kjeldahl, total [as N]VALUE report only all year
MW8Nitrogen, Ammonia TotalVALUE report only all year
MW8Nitrogen, Ammonia TotalVALUE report only all year
MW8Nitrogen, Ammonia TotalVALUE report only all year
MW8Nitrogen, Ammonia TotalVALUE report only all year
MW8Solids, total dissolvedVALUE report only all year
MW8Solids, total dissolvedVALUE report only all year
MW8Solids, total dissolvedVALUE report only all year
MW8Solids, total dissolvedVALUE report only all year
MW8Coliform, fecal generalVALUE report only all year
MW8Coliform, fecal generalVALUE report only all year
MW8Coliform, fecal generalVALUE report only all year
MW8Coliform, fecal generalVALUE report only all year

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