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Winnfield City of - WWTP

Sewage treatment plant, major discharger, Winnfield, Louisiana. NPDES permit LA0043915, in force until Sep 30, 2031. Last 12 months: over a limit 18 times (last June 2026), 66 required values missing, 10 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.

Last report on file
August 2026
Oct 2024 – Sep 2025
19 values over a limit, 28 required values missing, 11 of 24 reports late

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

All 18 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average14.7 mg/L≤ 10 mg/L47%
October 2025BOD, carbonaceous [5 day, 20 C], weekly average20.4 mg/L≤ 15 mg/L36%
October 2025Nitrogen, ammonia total [as N], monthly average11.08 mg/L≤ 4 mg/L177%
October 2025Nitrogen, ammonia total [as N], weekly average12.15 mg/L≤ 8 mg/L52%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average14 mg/L≤ 10 mg/L40%
November 2025BOD, carbonaceous [5 day, 20 C], weekly average20.9 mg/L≤ 15 mg/L39%
November 2025Nitrogen, ammonia total [as N], monthly average7.22 mg/L≤ 4 mg/L81%
November 2025Nitrogen, ammonia total [as N], weekly average13.8 mg/L≤ 8 mg/L73%
December 2025BOD, carbonaceous [5 day, 20 C], weekly average15.4 mg/L≤ 15 mg/L3%
December 2025BOD, carbonaceous [5 day, 20 C], weekly average15.4 mg/L≤ 15 mg/L3%
December 2025Coliform, fecal general, weekly geometric mean800 #/100mL≤ 400 #/100mL100%
December 2025Coliform, fecal general, weekly geometric mean800 #/100mL≤ 400 #/100mL100%
December 2025Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum0 %≥ 96 %100%
December 2025Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum0 %≥ 96 %100%
June 2026Coliform, fecal general, monthly geometric mean317 #/100mL≤ 200 #/100mL59%
June 2026Coliform, fecal general, monthly geometric mean317 #/100mL≤ 200 #/100mL59%
June 2026Coliform, fecal general, weekly geometric mean1264 #/100mL≤ 400 #/100mL216%
June 2026Coliform, fecal general, weekly geometric mean1264 #/100mL≤ 400 #/100mL216%

Limits in force (48)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 122 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 182 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
BOD, percent removal [total]monthly average minimum≥ 85 %all year
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 96 %all year
Whole Effluent Toxicity [WET] - C. dubiamonthly average minimum≥ 96 %all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7Day Chronic Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubiamaximumreport only (%)all year
Coef Of Var Static Renewal 7Day Chronic Pimephales promelasmaximumreport only (%)all year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0043915 · MCP: https://passage-data.com/mcp