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Magnolia Water Utility Operating Co., LLC

Sewerage Systems, Youngsville, Louisiana. NPDES permit LA0122343, in force until Feb 14, 2028. Last 12 months: over a limit 3 times (last November 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (28 values), form Q quarterly (4 values)
Renewal application due
Aug 18, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
25 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
November 2025BOD, carbonaceous [5 day, 20 C], daily maximum18 mg/L≤ 15 mg/L20%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average18 mg/L≤ 10 mg/L80%
November 2025Coliform, fecal general, monthly geometric mean218 #/100mL≤ 200 #/100mL9%

Limits in force (44)

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≤ 15 mg/LMay–Dec
Solids, total suspendedmonthly average≤ 15 mg/LMay–Dec
Solids, total suspendedmonthly average≤ 20 mg/LJan–Apr
Solids, total suspendedmonthly average≤ 20 mg/LJan–Apr
Solids, total suspendeddaily maximum≤ 23 mg/LMay–Dec
Solids, total suspendeddaily maximum≤ 23 mg/LMay–Dec
Solids, total suspendeddaily maximum≤ 30 mg/LJan–Apr
Solids, total suspendeddaily maximum≤ 30 mg/LJan–Apr
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≤ 10 mg/LJan–Apr
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan–Apr
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Dec
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LJan–Apr
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LJan–Apr
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/LMay–Dec
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/LMay–Dec
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 (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJan–Apr

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/LA0122343 · MCP: https://passage-data.com/mcp