City of Winnsboro - Winnsboro Municipal Treatment Plant

NPDES permit LA0020281 · Minor POTW · effective, expires 2028-09-30 · 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

2values over a limit
4required values missing, on 1 form(s)
24of 24 forms filed late

Last period with anything received: 2026-06-30. Most often over: Aldrin (2).

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 (26)

OutfallParameterStatisticLimitMonths
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 15 mg/L all year
001Solids, total suspendedWKLY AVG <= 23 mg/L all year
001Solids, total suspendedMO AVG <= 100 lb/d all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]WKLY AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]WKLY AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001AldrinMO AVG report only all year
001AldrinDAILY MX report only all year
001AldrinMO AVG <= .000005 lb/d all year
001AldrinDAILY MX <= .00001 lb/d all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantWKLY AVG report only all year
001Chlorine, total residualINST MAX report only all year
001Coliform, fecal generalMOAV GEO <= 200 #/100mL all year
001Coliform, fecal generalWE <= 400 #/100mL all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 15 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 67 lb/d all year
01ANitrogen, ammonia total [as N]MO AVG <= 5 mg/L all year
01ANitrogen, ammonia total [as N]WKLY AVG <= 10 mg/L all year
01ANitrogen, ammonia total [as N]MO AVG <= 33.4 lb/d 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