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Town of Maringouin WWTF

Sewage treatment plant, Maringouin, Louisiana. NPDES permit LA0086771 expired Jul 31, 2024; its limits still apply. Last 12 months: over a limit 12 times (last July 2026), 2 of 13 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (24 values), form Q quarterly (6 values)
Last report on file
July 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 3 of 16 reports late

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

Period endingParameterReportedLimitOver by
March 2026Coliform, fecal general, monthly geometric mean314 #/100mL≤ 200 #/100mL57%
March 2026Solids, total suspended, monthly average22.47 mg/L≤ 15 mg/L50%
March 2026Solids, total suspended, weekly average28 mg/L≤ 23 mg/L22%
April 2026Solids, total suspended, monthly average17.73 mg/L≤ 15 mg/L18%
April 2026Solids, total suspended, weekly average32 mg/L≤ 23 mg/L39%
May 2026Solids, total suspended, monthly average19.28 lb/d≤ 19 lb/d1%
May 2026Solids, total suspended, monthly average23.29 mg/L≤ 15 mg/L55%
May 2026Solids, total suspended, weekly average39 mg/L≤ 23 mg/L70%
June 2026Solids, total suspended, monthly average29.96 mg/L≤ 15 mg/L100%
June 2026Solids, total suspended, weekly average37 mg/L≤ 23 mg/L61%
July 2026Solids, total suspended, monthly average19.95 mg/L≤ 15 mg/L33%
July 2026Solids, total suspended, weekly average27 mg/L≤ 23 mg/L17%

Limits in force (30)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
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. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 13 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 13 lb/dall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 19 lb/dall year
Solids, total suspendedmonthly average≤ 19 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 plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 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/LA0086771 · MCP: https://passage-data.com/mcp