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City of Winnsboro - Winnsboro Municipal Treatment Plant

Sewage treatment plant, Winnsboro, Louisiana. NPDES permit LA0020281, in force until Sep 30, 2028. Last 12 months: over a limit 2 times (last March 2026), 4 required values missing, 21 of 21 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (12 values), outfall 001 form Q quarterly (10 values), outfall 01A form A quarterly (3 values)
Renewal application due
Apr 3, 2028 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 13 of 28 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
March 2026Aldrin, daily maximum< .00002 lb/d≤ .00001 lb/d100%
March 2026Aldrin, monthly average< .00002 lb/d≤ .000005 lb/d300%

Limits in force (26)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendedweekly average≤ 23 mg/Lall year001
Solids, total suspendedmonthly average≤ 100 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]weekly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]weekly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Aldrinmonthly averagereport only (mg/L)all year001
Aldrindaily maximumreport only (mg/L)all year001
Aldrinmonthly average≤ .000005 lb/dall year001
Aldrindaily maximum≤ .00001 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year001
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 67 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/Lall year01A
Nitrogen, ammonia total [as N]weekly average≤ 10 mg/Lall year01A
Nitrogen, ammonia total [as N]monthly average≤ 33.4 lb/dall year01A

New limits from Oct 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], monthly average2 mg/Ltighter1 mg/L (9 values, 6 below detection)—
Nitrogen, ammonia total [as N], monthly average13.4 lb/dtighter0.64 lb/d (9 values)0.0478×
Nitrogen, ammonia total [as N], weekly average4.8 mg/Ltighter1 mg/L (9 values, 6 below detection)—

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0020281 · MCP: https://passage-data.com/mcp