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ST Mary Parish Water & Sewer No.5

Sewage treatment plant, Four Corners, Louisiana. NPDES permit LA0088765, in force until Mar 31, 2028. Last 12 months: over a limit 10 times (last June 2026), 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (15 values), form Q quarterly (6 values)
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 0 of 16 reports late

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

Period endingParameterReportedLimitOver by
March 2026BOD, 5-day, 20 deg. C, monthly average14 mg/L≤ 10 mg/L40%
April 2026Chlorine, total residual, instantaneous maximum5.2 mg/L≤ .033 mg/L15658%
May 2026BOD, 5-day, 20 deg. C, monthly average16.7 lb/d≤ 13 lb/d28%
May 2026BOD, 5-day, 20 deg. C, monthly average20 mg/L≤ 10 mg/L100%
May 2026BOD, 5-day, 20 deg. C, weekly average37 mg/L≤ 15 mg/L147%
May 2026Coliform, fecal general, weekly average727 #/100mL≤ 400 #/100mL82%
June 2026BOD, 5-day, 20 deg. C, monthly average16 mg/L≤ 10 mg/L60%
June 2026BOD, 5-day, 20 deg. C, monthly average38.5 lb/d≤ 13 lb/d196%
June 2026BOD, 5-day, 20 deg. C, weekly average24 mg/L≤ 15 mg/L60%
June 2026Coliform, fecal general, monthly average208.3 #/100mL≤ 200 #/100mL4%

Limits in force (21)

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≤ 13 lb/dall 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≤ 20 lb/dall 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
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
Enterococcimonthly geometric mean≤ 35 CFU/100mLall year
Enterococciweekly geometric mean≤ 130 CFU/100mLall year
Coliform, fecal generalmonthly average≤ 200 #/100mLall year
Coliform, fecal generalweekly average≤ 400 #/100mLall 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/LA0088765 · MCP: https://passage-data.com/mcp