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Magnolia Water Utility Operating Co., LLC

Sewerage Systems, New Iberia, Louisiana. NPDES permit LA0127553 expired Aug 15, 2026; its limits still apply. Last 12 months: over a limit 9 times (last June 2026), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (4 values), form A quarterly
Last report on file
September 2026
Oct 2024 – Sep 2025
14 values over a limit, 55 required values missing, 8 of 16 reports late

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

Period endingParameterReportedLimitOver by
February 2026BOD, carbonaceous [5 day, 20 C], monthly average8 mg/L≤ 5 mg/L60%
February 2026Nitrogen, ammonia total [as N], monthly average3.1 mg/L≤ 2 mg/L55%
February 2026Solids, total suspended, daily maximum16 mg/L≤ 10 mg/L60%
February 2026Solids, total suspended, monthly average16 mg/L≤ 5 mg/L220%
May 2026Nitrogen, ammonia total [as N], daily maximum16 mg/L≤ 4 mg/L300%
May 2026Nitrogen, ammonia total [as N], monthly average16 mg/L≤ 2 mg/L700%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average6 mg/L≤ 5 mg/L20%
June 2026Nitrogen, ammonia total [as N], daily maximum44 mg/L≤ 4 mg/L1000%
June 2026Nitrogen, ammonia total [as N], monthly average44 mg/L≤ 2 mg/L2100%

Limits in force (34)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall 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≤ 5 mg/Lall year
Solids, total suspendedmonthly average≤ 5 mg/Lall year
Solids, total suspendeddaily maximum≤ 10 mg/Lall year
Solids, total suspendeddaily maximum≤ 10 mg/Lall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/Lall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year
Flow, in conduit or thru treatment plantdaily minimumreport only (gal/d)all year
Flow, in conduit or thru treatment plantdaily minimumreport only (gal/d)all year
Enterococcimonthly geometric mean≤ 35 CFU/100mLall year
Enterococcimonthly geometric mean≤ 35 CFU/100mLall year
Enterococcidaily maximum≤ 135 CFU/100mLall year
Enterococcidaily maximum≤ 135 CFU/100mLall year
Coliform, fecal generalmonthly average≤ 200 CFU/100mLall year
Coliform, fecal generalmonthly average≤ 200 CFU/100mLall year
Coliform, fecal generaldaily maximum≤ 400 CFU/100mLall year
Coliform, fecal generaldaily maximum≤ 400 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 10 mg/Lall 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/LA0127553 · MCP: https://passage-data.com/mcp