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Magnolia Water Utility Operating Company LLC - Diamondhead Estates Subdivision

Sewerage Systems, Lafayette, Louisiana. NPDES permit LA0074772, in force until Jun 30, 2030. Last 12 months: over a limit 7 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (14 values), form Q quarterly (4 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
10 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
January 2026Solids, total suspended, daily maximum174 mg/L≤ 30 mg/L480%
January 2026Solids, total suspended, monthly average47 mg/L≤ 20 mg/L135%
February 2026Coliform, fecal general, daily maximum680 #/100mL≤ 400 #/100mL70%
April 2026Nitrogen, ammonia total [as N], daily maximum28 mg/L≤ 20 mg/L40%
April 2026Nitrogen, ammonia total [as N], monthly average14.1 mg/L≤ 10 mg/L41%
May 2026Coliform, fecal general, daily maximum9200 #/100mL≤ 400 #/100mL2200%
May 2026Solids, total suspended, monthly average16 mg/L≤ 15 mg/L7%

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/LMay–Dec
Solids, total suspendedmonthly average≤ 20 mg/LJan–Apr
Solids, total suspendeddaily maximum≤ 23 mg/LMay–Dec
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≤ 5 mg/LMay–Dec
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LJan–Apr
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 plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/LMay–Dec

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/LA0074772 · MCP: https://passage-data.com/mcp